You don't need the Reddit app to delete posts — the mobile web browser works well for this. This guide covers deleting Reddit posts via mobile browsers on any phone or tablet.
Open Safari (iPhone), Chrome (Android), or any mobile browser. Go to reddit.com. Sign in to your account.
Tap your avatar or username to go to your profile. Select the Posts or Comments tab to see your history.
Tap the three-dot menu (⋯) on any post and select Delete. This works but is slow for multiple posts.
In your mobile browser, go to karmdit.com. Sign in with Reddit. Use the filter and select features to choose which posts to delete, then tap Delete All.
Yes. Reddit's full website works in mobile browsers, and Karmdit's web app works on any mobile browser. You don't need the Reddit app to delete posts.