Office Apps Not Opening

How to Fix OneNote Not Opening on iPhone or iPad

Emma BrownEmma Brown Oct 21, 2026 869 views

Question details

The user needs to troubleshoot and resolve an issue where the Microsoft OneNote application freezes or fails to launch on their mobile Apple device.

How to Fix OneNote Not Opening on iPhone or iPad
Product
Microsoft OneNote
Device & OS
iOS or iPadOS
Scenario
Attempting to launch or access notes within the Microsoft OneNote application on a mobile Apple device.
Observed behavior
The OneNote application freezes, crashes immediately upon launch, or completely fails to open.
Before you start

Ensure your device is connected to a stable Wi-Fi or cellular network, as OneNote requires an active internet connection to authenticate and sync your notebooks.

Solution 1Recommended

Force Close and Reopen OneNote

A simple force restart of the application can clear temporary glitches or background freezes preventing it from opening.

Often, background app processes can get stuck, causing the app to become unresponsive when you try to bring it to the foreground. Force closing the app terminates these stuck processes.

1
Open the App Switcher

Swipe up from the bottom edge of your iPhone or iPad screen and pause slightly in the middle of the screen to reveal all open applications.

2
Locate OneNote

Swipe right or left to find the OneNote app preview card among your running apps.

3
Force Close

Swipe up on the OneNote app preview card to force close it.

4
Relaunch the App

Return to your home screen and tap the OneNote icon to reopen the application.

Force Close and Reopen OneNote
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  1. 1. Download WPS Office: Search for WPS Office in the Apple App Store and download the free application.
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Frequently Asked Questions

Will deleting OneNote from my iPhone delete all my notes?

Deleting the app removes local app data. If your notes were successfully synced to your Microsoft OneDrive account before the app stopped working, they will restore once you reinstall and log back in. However, unsynced offline notes may be lost. This is why offloading the app is recommended over fully deleting it.

Why does OneNote keep crashing immediately after opening?

Immediate crashes are typically caused by a corrupted app cache, a pending iOS system update, or a glitch in the background synchronization process. Offloading the app or updating your device's iOS version usually resolves the crashing.

How can I access my OneNote files if the iPad app refuses to open?

You can safely access your synced notes by logging into OneNote on the web via Safari or another browser, or by opening the OneNote desktop application on your PC or Mac.