Hackers Keyboard has that via ctrl+z, but only in horizontal mode. For this only i had my Galaxy S3 in horizontal per default. But can’t do that with modern phones’ aspect ratio and i’m missing undo since then.

Edit: i’ll go with Heliboard for now.

  • M137
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    27 hours ago

    This has been one of my major complaints moving from iOS to Android, iOS has (had?) the “shake phone to undo”, and I used it often. So far no keyboard I like enough to use as my main has had undo easily accessible, it annoys me several times a week.