PDF Editing Issues

How to Fix Out of Memory Error in Adobe Acrobat iOS App

Tauseeq Magsi Oct 19, 2026 869 views

Question details

Users experience an 'Out of Memory' error message or a gray screen when attempting to add comments to a PDF file on an iPad or iPhone.

How to Fix Out of Memory Error in Acrobat iOS App

Product: Adobe Acrobat iOS App
Device & OS: iPadOS / iOS
Scenario: Adding comments or annotations to a PDF document using a mobile device.
Observed behavior: The application fails to render the comments, displaying an 'Out of Memory' prompt or a persistent gray screen, even when the PDF file size is relatively small.

Before you start

Ensure your iPad or iPhone has at least 1-2 GB of free storage space, and verify that any unsynced PDF edits are backed up to Adobe Document Cloud or your local files.

Solution 1Recommended

Update Software and Free Up Device Memory

Clear out background processes and ensure your system and app are up to date to eliminate memory leaks or known bugs.

Memory issues on iOS and iPadOS are often caused by having too many background apps open or running outdated software versions that improperly manage device RAM.

Close Unused Apps

Swipe up from the bottom of your iPad or iPhone screen and pause in the middle. Swipe up on all unused app previews to force-close them and free up active RAM.

Update iPadOS/iOS

Go to your device's Settings app, tap 'General', and select 'Software Update'. If an update is available, download and install it.

Update Adobe Acrobat

Open the Apple App Store, tap your profile picture, and scroll down to check for updates. Tap 'Update' next to Adobe Acrobat if available.

Restart Your Device

Hold the power button and volume button, then slide to power off. Wait a few seconds, then turn your iPad or iPhone back on and reopen the PDF.

Update Software and Free Up Device Memory

Quick Tip: A simple device restart is often the fastest way to clear out cached data and resolve temporary 'Out of Memory' bottlenecks.

Solution 2

Isolate the Document and Reinstall the App

Determine if the issue is caused by a specific corrupted PDF file or a corrupted app installation.

Lightweight PDF Editor

Comment on PDFs Smoothly Without Memory Crashes using WPS Office

If you are consistently facing memory issues and gray screens with Adobe Acrobat on your iPad, switch to WPS Office. Its highly optimized, lightweight architecture allows you to open, comment, and annotate PDFs flawlessly without overloading your device's memory.

1. Install WPS Office: Download and install WPS Office for free from the Apple App Store on your iPad or iPhone.
2. Open Your PDF: Launch the WPS Office app, navigate to your file manager or cloud storage, and open the PDF document you wish to edit.
3. Add Your Comments: Tap on the 'Tools' menu at the bottom, select 'Annotation', and start adding comments, highlights, and notes without experiencing memory lag.

Lightweight architecture prevents out-of-memory crashes on iPads and iPhones.Fully compatible with standard Adobe PDF formats and PDF annotations.Intuitive built-in tools to highlight text, draw shapes, and add comments seamlessly.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Acrobat say 'Out of Memory' when my iPad has plenty of storage space?

Storage space (where files are kept) is different from RAM (active memory used to run apps). Even with ample storage, having too many background apps open or a memory leak within the Acrobat app itself can cause the device to run out of RAM.

Will reinstalling the Acrobat iOS app delete my local PDF files?

Yes, if your PDF files are saved strictly in the local 'On My iPad' Acrobat app folder and not synced to Adobe Document Cloud or iCloud, deleting the app will erase them. Always back up your documents before uninstalling.

Can a specific PDF file trigger a memory error on my iPad?

Yes. Complex PDFs containing high-resolution images, multiple overlapping layers, or corrupted rendering elements can overload the mobile app's memory limits during processing, leading to crashes or a gray screen.

PDF Troubleshooting