You can try this way:

App Store>Updates>Purchased

  1. View the apps you deleted
  2. Find the app which about the same size with NULL app or version that match to the "Null" version
  3. Download the app again
  4. Remove it again and delete the cache

Hope it works for you.

Answer from Mark on Stack Exchange
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Quora
quora.com › What-is-Null-When-I-deleted-an-app-a-message-popped-up-saying-ALLOW-NULL-TO-ACCESS-I-have-an-iPhone-XR-All-firmware-is-updated
What is 'Null'? When I deleted an app, a message popped up saying “ALLOW NULL TO ACCESS”. I have an iPhone XR. All firmware is updated. - Quora
Answer (1 of 4): That is (probably) a programming error of an old app. Those type of error messages come from the way how messages are handled during programming. This is how these messages are created: Some basic message is prepared: for example: ALLOW TO ACCESS
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Apple Community
discussions.apple.com › thread › 6861025
"Null" app can't be deleted - Apple Community
June 16, 2017 - Once re-installed I was able to do a backup to my computer...then I was able to delete it completely! Good Luck! Hope this works for you too. I plugged my phone into my computer, launched iexplorer (I have a paid version; you may be able to do this with a free version), clicked on apps, and any app that looked like a web page ended up being a null app on my phone.
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Google Support
support.google.com › android › thread › 241452010 › don-t-have-full-control
Don't have full control - Android Community
Skip to main content · Android Help · Sign in · Google Help · Help Center · Community · Android · Privacy Policy · Terms of Service · Submit feedback · Send feedback on... This help content & information · General Help Center experience · Next · Help Center · Community · Get started with Android · Android · false · Search · Clear search · Close search · Google apps ·
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Samsung Community
eu.community.samsung.com › samsung community › products › mobile apps & services
A52 5g ghost app - Samsung Community
August 22, 2024 - First try to restart your phone and see if it disappears. If not then try wiping the partition cache https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ ... I had the same experience, restarting the phone ...
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Reddit
reddit.com › r/samsunggalaxy › what is this app? its called 'null'. i have not downloaded any third party app from chrome or anything.
r/samsunggalaxy on Reddit: What is this app? Its called 'null'. I have not downloaded any third party app from chrome or anything.
December 16, 2023 - You surfed the Internet with Chrome, so you can't possibly know that. ... Do wipe cache partition. If this don't work try deleting the last app you downloaded (not updated) from the play store.
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TechRadar
techradar.com › phones › android
How to uninstall apps on Android | TechRadar
December 25, 2024 - It's easy to manage apps on your Android phone by regularly uninstalling those you no longer need. It's a good idea to do this regularly to ensure optimal device performance and also just to make sure that everything on your phone is better organized. Whether you drag and delete apps directly from the home screen, manage multiple apps uninstalls through the Play Store's settings, or individually search and remove apps from within the Play Store itself, you're now on your way to keeping your device clutter-free.
Find elsewhere
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Google Support
support.google.com › android › answer › 13627402
Delete apps on your Android device - Android Help
Some of these steps work only on Android 13 and up. Learn how to check your Android version. Open the Google Play Store app . At the top right, tap the Profile icon. Tap Manage apps & devices Manage. Select the name of the app you want to delete.
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Stack Overflow
stackoverflow.com › questions › 70624963 › why-am-i-getting-null-on-a-method-to-delete-an-android-tablerow
java - Why am I getting null on a method to delete an Android TableRow? - Stack Overflow
The two methods that created the TableRows dynamically for the TableLayouts add a tag based identifier for each row created, so when the deleteTableRows() method is called, the correct row is deleted based upon the tag identifier.
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Tech Advisor
techadvisor.com › home › how-to › phone how-to
How to Delete Apps on Android: Uninstall Any App - Tech Advisor
August 5, 2024 - Scroll through the list of installed apps and tap the one you want to delete. Tap ‘Uninstall’ and confirm your choice. ... If you don’t see an ‘Uninstall’ option, then that means you’re likely looking at a system app that you’re not able to remove entirely from your Android phone or tablet.
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Wikihow
wikihow.com › computers and electronics › software › file manipulation › how to open null files easily: windows, mac, android, ios
How to Open Null Files Easily: Windows, Mac, Android, iOS
March 10, 2025 - Since a file ending with .null isn't going to be important to any apps, it's likely safe to delete. ... Open your file manager on your Android or iOS device.
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Samsung Community
r1.community.samsung.com › philippines › smartphones › galaxy a
Solved: null Application Problem - Samsung Members
January 27, 2025 - hi, what is this? this just popped ... thankyou! My device is Galaxy A06 · Solved! Go to Solution. ... Just restart your phone or force stop one ui home app to fix this....
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OnePlus Community
community.oneplus.com › threads › null-is-using-your-camera-microphone.1412362
NULL is using your camera/microphone
Introducing our new OnePlus Community experience, with a completely revamped structure, built from the ground-up.
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Asurion
asurion.com › connect › tech-tips › how-to-delete-preinstalled-apps-on-android
How to delete pre-installed apps on Android | Asurion
December 1, 2025 - Tired of unused apps taking up space on your Android? Learn how to delete or disable pre-installed apps with this easy step-by-step guide.
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Quora
quora.com › Why-cant-I-delete-the-NULL-app-in-my-iOS-settings
Why can't I delete the NULL app in my iOS settings? - Quora
Answer (1 of 3): App Store>Updates>Purchased 1.view the apps you deleted 2.find the app which about the same size with NULL app 3.download the app again 4.remove it again and delete the cache Summary: Because when you delete the application chose to keep the data, resulting in data remains o...