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.

  • @hexagonwin
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    24 hours ago

    i think hackers keyboard had a semi full layout option for enabling ctrl keys and such on portrait, though you need a decently large phone for that.