diff --git a/packages/desktop-client/package.json b/packages/desktop-client/package.json
index c53176fac8..d696a4540a 100644
--- a/packages/desktop-client/package.json
+++ b/packages/desktop-client/package.json
@@ -74,7 +74,6 @@
     "sass": "^1.70.0",
     "swc-loader": "^0.2.6",
     "terser-webpack-plugin": "^5.3.10",
-    "ua-parser-js": "^2.0.0",
     "usehooks-ts": "^3.0.1",
     "uuid": "^9.0.1",
     "vite": "^5.2.14",
diff --git a/packages/desktop-client/src/components/mobile/transactions/TransactionEdit.jsx b/packages/desktop-client/src/components/mobile/transactions/TransactionEdit.jsx
index ec20530193..2b4ce69b4c 100644
--- a/packages/desktop-client/src/components/mobile/transactions/TransactionEdit.jsx
+++ b/packages/desktop-client/src/components/mobile/transactions/TransactionEdit.jsx
@@ -29,9 +29,9 @@ import {
   parseISO,
   isValid as isValidDate,
 } from 'date-fns';
-import { UAParser } from 'ua-parser-js';
 
 import { pushModal } from 'loot-core/client/modals/modalsSlice';
+import * as Platform from 'loot-core/client/platform';
 import { setLastTransaction } from 'loot-core/client/queries/queriesSlice';
 import { runQuery } from 'loot-core/client/query-helpers';
 import { send } from 'loot-core/platform/client/fetch';
@@ -75,9 +75,6 @@ import { getPrettyPayee } from '../utils';
 
 import { FocusableAmountInput } from './FocusableAmountInput';
 
-const agent = UAParser(navigator.userAgent);
-const isIOSAgent = agent.browser.name === 'Mobile Safari';
-
 function getFieldName(transactionId, field) {
   return `${field}-${transactionId}`;
 }
@@ -491,7 +488,7 @@ const TransactionEditInner = memo(function TransactionEditInner({
   const [totalAmountFocused, setTotalAmountFocused] = useState(
     // iOS does not support automatically opening up the keyboard for the
     // total amount field. Hence we should not focus on it on page render.
-    !isIOSAgent,
+    !Platform.isIOSAgent,
   );
   const childTransactionElementRefMap = useRef({});
   const hasAccountChanged = useRef(false);
@@ -509,7 +506,7 @@ const TransactionEditInner = memo(function TransactionEditInner({
   const isInitialMount = useInitialMount();
 
   useEffect(() => {
-    if (isInitialMount && isAdding && !isIOSAgent) {
+    if (isInitialMount && isAdding && !Platform.isIOSAgent) {
       onTotalAmountEdit();
     }
   }, [isAdding, isInitialMount, onTotalAmountEdit]);
diff --git a/packages/desktop-client/src/components/modals/EnvelopeBudgetMenuModal.tsx b/packages/desktop-client/src/components/modals/EnvelopeBudgetMenuModal.tsx
index 7dc04f1552..3f9c650fdd 100644
--- a/packages/desktop-client/src/components/modals/EnvelopeBudgetMenuModal.tsx
+++ b/packages/desktop-client/src/components/modals/EnvelopeBudgetMenuModal.tsx
@@ -7,6 +7,7 @@ import { theme } from '@actual-app/components/theme';
 import { View } from '@actual-app/components/view';
 
 import { type Modal as ModalType } from 'loot-core/client/modals/modalsSlice';
+import * as Platform from 'loot-core/client/platform';
 import { envelopeBudget } from 'loot-core/client/queries';
 import { amountToInteger, integerToAmount } from 'loot-core/shared/util';
 
@@ -52,7 +53,11 @@ export function EnvelopeBudgetMenuModal({
   };
 
   useEffect(() => {
-    setAmountFocused(true);
+    // iOS does not support automatically opening up the keyboard for the
+    // total amount field. Hence we should not focus on it on page render.
+    if (!Platform.isIOSAgent) {
+      setAmountFocused(true);
+    }
   }, []);
 
   if (!category) {
diff --git a/packages/desktop-client/src/components/modals/TrackingBudgetMenuModal.tsx b/packages/desktop-client/src/components/modals/TrackingBudgetMenuModal.tsx
index bcb0353318..5d3a99621d 100644
--- a/packages/desktop-client/src/components/modals/TrackingBudgetMenuModal.tsx
+++ b/packages/desktop-client/src/components/modals/TrackingBudgetMenuModal.tsx
@@ -7,6 +7,7 @@ import { theme } from '@actual-app/components/theme';
 import { View } from '@actual-app/components/view';
 
 import { type Modal as ModalType } from 'loot-core/client/modals/modalsSlice';
+import * as Platform from 'loot-core/client/platform';
 import { trackingBudget } from 'loot-core/client/queries';
 import { amountToInteger, integerToAmount } from 'loot-core/shared/util';
 
@@ -52,7 +53,11 @@ export function TrackingBudgetMenuModal({
   };
 
   useEffect(() => {
-    setAmountFocused(true);
+    // iOS does not support automatically opening up the keyboard for the
+    // total amount field. Hence we should not focus on it on page render.
+    if (!Platform.isIOSAgent) {
+      setAmountFocused(true);
+    }
   }, []);
 
   if (!category) {
diff --git a/packages/loot-core/package.json b/packages/loot-core/package.json
index 583c37bda0..edccefdbb9 100644
--- a/packages/loot-core/package.json
+++ b/packages/loot-core/package.json
@@ -36,6 +36,7 @@
     "mitt": "^3.0.1",
     "reselect": "^4.1.8",
     "slash": "3.0.0",
+    "ua-parser-js": "^2.0.0",
     "uuid": "^9.0.1"
   },
   "devDependencies": {
diff --git a/packages/loot-core/src/client/__mocks__/platform.web.ts b/packages/loot-core/src/client/__mocks__/platform.web.ts
index a65bd002e6..5417b58c65 100644
--- a/packages/loot-core/src/client/__mocks__/platform.web.ts
+++ b/packages/loot-core/src/client/__mocks__/platform.web.ts
@@ -3,3 +3,5 @@ export const isPlaywright = false;
 export const OS: 'windows' | 'mac' | 'linux' | 'unknown' = 'unknown';
 export const env: 'web' | 'mobile' | 'unknown' = 'unknown';
 export const isBrowser = false;
+
+export const isIOSAgent = false;
diff --git a/packages/loot-core/src/client/platform.electron.ts b/packages/loot-core/src/client/platform.electron.ts
index aee5e87a99..fc10d98eee 100644
--- a/packages/loot-core/src/client/platform.electron.ts
+++ b/packages/loot-core/src/client/platform.electron.ts
@@ -15,3 +15,5 @@ export const OS: 'windows' | 'mac' | 'linux' | 'unknown' = isWindows
       : 'unknown';
 export const env: 'web' | 'mobile' | 'unknown' = 'unknown';
 export const isBrowser = false;
+
+export const isIOSAgent = false;
diff --git a/packages/loot-core/src/client/platform.ts b/packages/loot-core/src/client/platform.ts
index a65bd002e6..5417b58c65 100644
--- a/packages/loot-core/src/client/platform.ts
+++ b/packages/loot-core/src/client/platform.ts
@@ -3,3 +3,5 @@ export const isPlaywright = false;
 export const OS: 'windows' | 'mac' | 'linux' | 'unknown' = 'unknown';
 export const env: 'web' | 'mobile' | 'unknown' = 'unknown';
 export const isBrowser = false;
+
+export const isIOSAgent = false;
diff --git a/packages/loot-core/src/client/platform.web.ts b/packages/loot-core/src/client/platform.web.ts
index 7d81d477d5..dfae65bfe5 100644
--- a/packages/loot-core/src/client/platform.web.ts
+++ b/packages/loot-core/src/client/platform.web.ts
@@ -1,3 +1,5 @@
+import { UAParser } from 'ua-parser-js';
+
 const isWindows =
   navigator.platform && navigator.platform.toLowerCase() === 'win32';
 
@@ -13,3 +15,6 @@ export const OS: 'windows' | 'mac' | 'linux' | 'unknown' = isWindows
     : 'linux';
 export const env: 'web' | 'mobile' | 'unknown' = 'web';
 export const isBrowser = true;
+
+const agent = UAParser(navigator.userAgent);
+export const isIOSAgent = agent.browser.name === 'Mobile Safari';
diff --git a/upcoming-release-notes/4651.md b/upcoming-release-notes/4651.md
new file mode 100644
index 0000000000..22670fceb4
--- /dev/null
+++ b/upcoming-release-notes/4651.md
@@ -0,0 +1,6 @@
+---
+category: Bugfix
+authors: [MatissJanis]
+---
+
+Mobile: fix focusing on budget amount in iOS.
diff --git a/yarn.lock b/yarn.lock
index 5685248582..3908f7af5e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -201,7 +201,6 @@ __metadata:
     sass: "npm:^1.70.0"
     swc-loader: "npm:^0.2.6"
     terser-webpack-plugin: "npm:^5.3.10"
-    ua-parser-js: "npm:^2.0.0"
     usehooks-ts: "npm:^3.0.1"
     uuid: "npm:^9.0.1"
     vite: "npm:^5.2.14"
@@ -14488,6 +14487,7 @@ __metadata:
     terser-webpack-plugin: "npm:^5.3.10"
     ts-node: "npm:^10.9.2"
     typescript: "npm:^5.8.2"
+    ua-parser-js: "npm:^2.0.0"
     uuid: "npm:^9.0.1"
     webpack: "npm:^5.94.0"
     webpack-bundle-analyzer: "npm:^4.10.1"