diff --git a/docs/architecture/platform-versions.md b/docs/architecture/platform-versions.md
index 65aa8751b7b..a2ebdb86a22 100644
--- a/docs/architecture/platform-versions.md
+++ b/docs/architecture/platform-versions.md
@@ -91,11 +91,16 @@ History:
 * We dropped iOS 10 support in 2020-10. It was 0.3% of iOS users who
   tried Zulip, and we wanted to use a feature introduced in iOS 11,
   called "named colors".
+* We [dropped iOS 11 support] in 2021-04. It was 0.1% of iOS users
+  who tried Zulip. We started iOS 12 support at 12.1 because Xcode's
+  dropdown for "Deployment Target" didn't have a 12.0.
+<!-- When updating this, please update `docs/developer-guide.md` as well. -->
 
 [dropped-android-j]: https://chat.zulip.org/#narrow/stream/48-mobile/topic/platform.20versions/near/625585
 [dropped iOS 8 support]: https://chat.zulip.org/#narrow/stream/48-mobile/topic/platform.20versions/near/628412
 [dropped iOS 9 support]: https://chat.zulip.org/#narrow/stream/48-mobile/topic/platform.20versions/near/771761
 [dropped-android-k]: https://chat.zulip.org/#narrow/stream/48-mobile/topic/platform.20versions/near/794551
+[dropped iOS 11 support]: https://chat.zulip.org/#narrow/stream/48-mobile/topic/platform.20versions/near/1165087
 
 
 Related observations:
diff --git a/docs/developer-guide.md b/docs/developer-guide.md
index 98f633a1e7f..a479290436c 100644
--- a/docs/developer-guide.md
+++ b/docs/developer-guide.md
@@ -1,7 +1,7 @@
 # Developer guide
 
 We target operating systems >= Android 5 Lollipop (API 21)
-and >= iOS 11.0.  (Details [here](architecture/platform-versions.md).)
+and >= iOS 12.1.  (Details [here](architecture/platform-versions.md).)
 
 ## Why React Native?
 
diff --git a/ios/Podfile b/ios/Podfile
index 2a81fe4902e..171e9cb7590 100644
--- a/ios/Podfile
+++ b/ios/Podfile
@@ -1,6 +1,6 @@
 # This should match the iOS Deployment Target
 # (project > ZulipMobile > Info in Xcode)
-platform :ios, '11.0'
+platform :ios, '12.1'
 
 require_relative '../node_modules/react-native/scripts/react_native_pods'
 require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'
diff --git a/ios/Podfile.lock b/ios/Podfile.lock
index c271aa7fe7c..d8ebea7620f 100644
--- a/ios/Podfile.lock
+++ b/ios/Podfile.lock
@@ -721,6 +721,6 @@ SPEC CHECKSUMS:
   Yoga: 4bd86afe9883422a7c4028c00e34790f560923d6
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a
 
-PODFILE CHECKSUM: 0eb2bf1b0f7972fc7183f5eac73708f76355c614
+PODFILE CHECKSUM: 46ba24e5bbaf52d511ae0e860a6c332e11c21c0b
 
 COCOAPODS: 1.10.1
diff --git a/ios/ZulipMobile.xcodeproj/project.pbxproj b/ios/ZulipMobile.xcodeproj/project.pbxproj
index 837d8bc8f87..34a2829d9c8 100644
--- a/ios/ZulipMobile.xcodeproj/project.pbxproj
+++ b/ios/ZulipMobile.xcodeproj/project.pbxproj
@@ -491,7 +491,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = "";
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.1;
 				LD_RUNPATH_SEARCH_PATHS = "/usr/lib/swift $(inherited)";
 				LIBRARY_SEARCH_PATHS = (
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)\"",
@@ -546,7 +546,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = "";
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.1;
 				LD_RUNPATH_SEARCH_PATHS = "/usr/lib/swift $(inherited)";
 				LIBRARY_SEARCH_PATHS = (
 					"\"$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)\"",
diff --git a/src/webview/js/js.js b/src/webview/js/js.js
index 207c915e04f..7a2d7ddb0c7 100644
--- a/src/webview/js/js.js
+++ b/src/webview/js/js.js
@@ -21,8 +21,8 @@ import { toggleSpoiler } from './spoilers';
  *
  * * (When updating these, be sure to update tools/generate-webview-js too.)
  *
- * * We support iOS 11.  So this code needs to work on Mobile Safari 11.
- *   Graceful degradation is acceptable below iOS 13 / Mobile Safari 13.
+ * * We support iOS 12.  So this code needs to work on Mobile Safari 12.
+ *   Graceful degradation is acceptable below iOS 14 / Mobile Safari 14.
  *
  * * For Android, core functionality needs to work on Chrome 44.
  *   Graceful degradation is acceptable below Chrome 74.
diff --git a/tools/generate-webview-js b/tools/generate-webview-js
index 95a144dd148..6bfa36c56a3 100755
--- a/tools/generate-webview-js
+++ b/tools/generate-webview-js
@@ -43,7 +43,7 @@ const targetPlatforms = {
   // Babel does distinguish `safari` (meaning on macOS, I guess) from `ios`.
   // Some features arrive in e.g. "safari 11.1" but "ios 11.3", or in
   // 13.1 vs 13.4, so the distinction is still relevant.
-  ios: 11,
+  ios: 12,
 };
 
 // Disable the default react-native transformations.