diff --git a/docs/protocol/diagrams/ios-notifications.mmd b/docs/protocol/diagrams/ios-notifications.mmd
new file mode 100644
index 0000000000..aede1d3e3e
--- /dev/null
+++ b/docs/protocol/diagrams/ios-notifications.mmd
@@ -0,0 +1,90 @@
+---
+title: "Notifications flow"
+---
+
+sequenceDiagram
+    participant Client
+    participant NTF
+    participant SMP
+    participant Apple
+
+    autonumber
+
+    Note over Client,NTF: iOS setup app first-time
+
+    Client->>NTF:Create token (tknCreated)
+    NTF->>Apple:Send test notification with secret to APNs
+    Apple-->>Client:Send test notification with secret to client
+    Client->>NTF:Verify iOS token (tknVerified)
+
+    Note over Client,NTF: iOS creates link
+
+    alt Create credentials for queue (new client)
+        Client->>SMP:ntfNewCreated
+    else Create credentials for queue (old client)
+        Client->>SMP:ntfCreated
+    end
+
+    Note over Client,SMP: Subscription phase
+
+    Client->>NTF:Create subscription based on credentials (subCreated)
+    
+    alt Subscription request
+        NTF->>SMP:ntfSub
+    else Subscription fail: AUTH
+        NTF->>SMP:ntfSubAuth
+    else Subscription fail: Duplicate
+        NTF->>SMP:ntfSubDuplicate
+    end
+
+    Note over Client,SMP: Notification phase
+
+    loop Every minute
+        SMP-->SMP: Queues with notification<br/>waiting to be delivered (ntfCount1)
+    end
+
+    alt SMP recevies<br/>message with notification
+        SMP->>SMP:msgRecvNtf
+    else Client asks SMP to get new message
+        Client->>SMP:msgGet
+    else Client sents message with notification flag
+        Client->>SMP:msgSentNtf
+    end
+
+    alt SMP recevies get
+        SMP-->>SMP:msgRecvGet
+    else Prohibited
+        SMP-->>SMP:msgGetProhibited
+    else Duplicate
+        SMP-->SMP:msgGetDuplicate
+    else AUTH
+        SMP-->SMP:msgGetAuth
+    else NoMsg
+        SMP-->SMP:msgGetNoMsg
+    end     
+
+    alt Send notification
+        SMP->>NTF:msgNtfs
+    else No subsciptions<br/>(will deliver)
+        SMP->>SMP:msgNtfNoSub
+    else Lost<br/>(no delivery)
+        SMP->>SMP:msgNtfLost
+    else Expired<br/>(no delivery)
+        SMP->>SMP:msgNtfExpired
+    end
+
+    NTF-->>NTF:Received notification (ntfReceived)
+
+    Note over Client,Apple: Final phase
+
+    alt Delivered notification to Apple APNs
+        NTF-->>Apple:ntfDelivered
+    else Failed to deliver
+        NTF-->>Apple:ntfFailed
+    end
+
+    Apple->>Client:Sent notification (visible only via Apple's Console)
+
+    Note over Client,SMP: Confirmation phase
+
+    Client-->>SMP:Client received (msgRecvNtf)
diff --git a/docs/protocol/diagrams/ios-notifications.svg b/docs/protocol/diagrams/ios-notifications.svg
new file mode 100644
index 0000000000..4aa76c3c34
--- /dev/null
+++ b/docs/protocol/diagrams/ios-notifications.svg
@@ -0,0 +1 @@
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x="407">Subscription phase</tspan></text></g><g><line class="loopLine" y2="658" x2="749" y1="658" x1="527"/><line class="loopLine" y2="991" x2="749" y1="658" x1="749"/><line class="loopLine" y2="991" x2="749" y1="991" x1="527"/><line class="loopLine" y2="991" x2="527" y1="658" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="774" x2="749" y1="774" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="885" x2="749" y1="885" x1="527"/><polygon class="labelBox" points="527,658 577,658 577,671 568.6,678 527,678"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="671" x="552">alt</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="676" x="663"><tspan x="663">[Subscription</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="695" x="663"><tspan x="663">request]</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="792" x="638">[Subscription fail:</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="811" x="638">AUTH]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="903" x="638">[Subscription fail:</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="922" x="638">Duplicate]</text></g><g><rect class="note" height="39" width="713" stroke="#666" fill="#EDF2AE" y="1001" x="50"/><text style="font-size: 16px; font-weight: 400;" dy="1em" class="noteText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1006" x="407"><tspan x="407">Notification phase</tspan></text></g><g><line class="loopLine" y2="1050" x2="874" y1="1050" x1="604"/><line class="loopLine" y2="1222" x2="874" y1="1050" x1="874"/><line class="loopLine" y2="1222" x2="874" y1="1222" x1="604"/><line class="loopLine" y2="1222" x2="604" y1="1050" x1="604"/><polygon class="labelBox" points="604,1050 654,1050 654,1063 645.6,1070 604,1070"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1063" x="629">loop</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1068" x="764"><tspan x="764">[Every minute]</tspan></text></g><g><line class="loopLine" y2="1232" x2="824" y1="1232" x1="64"/><line class="loopLine" y2="1559" x2="824" y1="1232" x1="824"/><line class="loopLine" y2="1559" x2="824" y1="1559" x1="64"/><line class="loopLine" y2="1559" x2="64" y1="1232" x1="64"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="1378" x2="824" y1="1378" x1="64"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="1471" x2="824" y1="1471" x1="64"/><polygon class="labelBox" points="64,1232 114,1232 114,1245 105.6,1252 64,1252"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1245" x="89">alt</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1250" x="469"><tspan x="469">[SMP recevies</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1269" x="469"><tspan x="469">message with notification]</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1396" x="444">[Client asks SMP to get new message]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1489" x="444">[Client sents message with notification flag]</text></g><g><line class="loopLine" y2="1569" x2="824" y1="1569" x1="654"/><line class="loopLine" y2="2269" x2="824" y1="1569" x1="824"/><line class="loopLine" y2="2269" x2="824" y1="2269" x1="654"/><line class="loopLine" y2="2269" x2="654" y1="1569" x1="654"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="1734" x2="824" y1="1734" x1="654"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="1875" x2="824" y1="1875" x1="654"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="1998" x2="824" y1="1998" x1="654"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="2121" x2="824" y1="2121" x1="654"/><polygon class="labelBox" points="654,1569 704,1569 704,1582 695.6,1589 654,1589"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1582" x="679">alt</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1587" x="764"><tspan x="764">[SMP</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1606" x="764"><tspan x="764">recevies</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1625" x="764"><tspan x="764">get]</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1752" x="739">[Prohibited-</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1771" x="739">]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="1893" x="739">[Duplicate]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2016" x="739">[AUTH]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2139" x="739">[NoMsg]</text></g><g><line class="loopLine" y2="2279" x2="824" y1="2279" x1="527"/><line class="loopLine" y2="2862" x2="824" y1="2279" x1="824"/><line class="loopLine" y2="2862" x2="824" y1="2862" x1="527"/><line class="loopLine" y2="2862" x2="527" y1="2279" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="2414" x2="824" y1="2414" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="2555" x2="824" y1="2555" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="2696" x2="824" y1="2696" x1="527"/><polygon class="labelBox" points="527,2279 577,2279 577,2292 568.6,2299 527,2299"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2292" x="552">alt</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2297" x="700.5"><tspan x="700.5">[Send</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2316" x="700.5"><tspan x="700.5">notification-</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2335" x="700.5"><tspan x="700.5">]</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2432" x="675.5">[No subsciptions</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2451" x="675.5">(will deliver)]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2573" x="675.5">[Lost</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2592" x="675.5">(no delivery)]</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2714" x="675.5">[Expired</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="2733" x="675.5">(no delivery)]</text></g><g><rect class="note" height="39" width="913" stroke="#666" fill="#EDF2AE" y="2950" x="50"/><text style="font-size: 16px; font-weight: 400;" dy="1em" class="noteText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2955" x="507"><tspan x="507">Final phase</tspan></text></g><g><line class="loopLine" y2="2999" x2="949" y1="2999" x1="527"/><line class="loopLine" y2="3185" x2="949" y1="2999" x1="949"/><line class="loopLine" y2="3185" x2="949" y1="3185" x1="527"/><line class="loopLine" y2="3185" x2="527" y1="2999" x1="527"/><line style="stroke-dasharray: 3, 3;" class="loopLine" y2="3097" x2="949" y1="3097" x1="527"/><polygon class="labelBox" points="527,2999 577,2999 577,3012 568.6,3019 527,3019"/><text style="font-size: 16px; font-weight: 400;" class="labelText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3012" x="552">alt</text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="3017" x="763"><tspan x="763">[Delivered notification to Apple APNs]</tspan></text><text style="font-size: 16px; font-weight: 400;" class="loopText" text-anchor="middle" y="3115" x="738">[Failed to deliver]</text></g><g><rect class="note" height="39" width="713" stroke="#666" fill="#EDF2AE" y="3243" x="50"/><text style="font-size: 16px; font-weight: 400;" dy="1em" class="noteText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3248" x="407"><tspan x="407">Confirmation phase</tspan></text></g><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="129" x="305">Create token (tknCreated)</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="162" x2="534" y1="162" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="166" x="76">1</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="177" x="737">Send test notification with secret to APNs</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="210" x2="934" y1="210" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="214" x="539">2</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="225" x="508">Send test notification with secret to client</text><line style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" y2="258" x2="79" y1="258" x1="937"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="262" x="937">3</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="273" x="305">Verify iOS token (tknVerified)</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="306" x2="534" y1="306" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="310" x="76">4</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="415" x="405">ntfNewCreated</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="448" x2="734" y1="448" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="452" x="76">5</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="508" x="405">ntfCreated</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="541" x2="734" y1="541" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="545" x="76">6</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="615" x="305">Create subscription based on credentials (subCreated)</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="648" x2="534" y1="648" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="652" x="76">7</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="726" x="637">ntfSub</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="759" x2="734" y1="759" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="763" x="539">8</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="837" x="637">ntfSubAuth</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="870" x2="734" y1="870" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="874" x="539">9</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="948" x="637">ntfSubDuplicate</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="981" x2="734" y1="981" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="985" x="539">10</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1100" x="739">Queues with notification</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1119" x="739">waiting to be delivered (ntfCount1)</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,1152 C 799,1142 799,1182 739,1172"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1156" x="739">11</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1300" x="739">msgRecvNtf</text><path style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" d="M 739,1333 C 799,1323 799,1363 739,1353"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1337" x="739">12</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1423" x="405">msgGet</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="1456" x2="734" y1="1456" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1460" x="76">13</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1516" x="405">msgSentNtf</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="1549" x2="734" y1="1549" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1553" x="76">14</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1656" x="739">msgRecvGet</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,1689 C 799,1679 799,1719 739,1709"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1693" x="739">15</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1797" x="739">msgGetProhibited</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,1830 C 799,1820 799,1860 739,1850"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1834" x="739">16</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="1920" x="739">msgGetDuplicate</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,1953 C 799,1943 799,1983 739,1973"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="1957" x="739">17</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2043" x="739">msgGetAuth</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,2076 C 799,2066 799,2106 739,2096"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2080" x="739">18</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2166" x="739">msgGetNoMsg</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" stroke="none" stroke-width="2" class="messageLine1" d="M 739,2199 C 799,2189 799,2229 739,2219"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2203" x="739">19</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2366" x="640">msgNtfs</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="2399" x2="542" y1="2399" x1="737"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2403" x="737">20</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2477" x="739">msgNtfNoSub</text><path style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" d="M 739,2510 C 799,2500 799,2540 739,2530"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2514" x="739">21</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2618" x="739">msgNtfLost</text><path style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" d="M 739,2651 C 799,2641 799,2681 739,2671"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2655" x="739">22</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2759" x="739">msgNtfExpired</text><path style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" d="M 739,2792 C 799,2782 799,2822 739,2812"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2796" x="739">23</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="2877" x="539">Received notification (ntfReceived)</text><path style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" d="M 539,2910 C 599,2900 599,2940 539,2930"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="2914" x="539">24</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3049" x="737">ntfDelivered</text><line style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" y2="3082" x2="934" y1="3082" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="3086" x="539">25</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3142" x="737">ntfFailed</text><line style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" y2="3175" x2="934" y1="3175" x1="539"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="3179" x="539">26</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3200" x="508">Sent notification (visible only via Apple's Console)</text><line style="fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine0" y2="3233" x2="79" y1="3233" x1="937"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="3237" x="937">27</text><text style="font-size: 16px; font-weight: 400;" dy="1em" class="messageText" alignment-baseline="middle" dominant-baseline="middle" text-anchor="middle" y="3297" x="405">Client received (msgRecvNtf)</text><line style="stroke-dasharray: 3, 3; fill: none;" marker-start="url(#sequencenumber)" marker-end="url(#arrowhead)" stroke="none" stroke-width="2" class="messageLine1" y2="3330" x2="734" y1="3330" x1="76"/><text class="sequenceNumber" text-anchor="middle" font-size="12px" font-family="sans-serif" y="3334" x="76">28</text><text y="-25" x="406.5">Notifications flow</text></svg>
\ No newline at end of file
diff --git a/docs/protocol/simplex-chat.md b/docs/protocol/simplex-chat.md
index c74465f6fe..45b75efd52 100644
--- a/docs/protocol/simplex-chat.md
+++ b/docs/protocol/simplex-chat.md
@@ -342,3 +342,7 @@ This threat model compliments SMP, XFTP, push notifications and XRCP protocols t
 *cannot:*
 
 - prove that two group members with incognito profiles is the same user.
+
+## Sub-protocol for push notifications
+
+![iOS notifications](./diagrams/ios-notifications.svg)