Hi Po Lu, I am testing out spaced repetition systems which work fully within Emacs and also on Android. When I tried org-drill, it failed to recognize my key inputs. After digging, I found that on Android read-key-sequence simply returns [text-conversion], instead of whatever key sequence was actually pressed. Running an old version of Android Emacs from F-Droid; please forgive me if this is already fixed: GNU Emacs 30.0.50 (build 1, aarch64-unknown-linux-android22) of 2024-02-12 Internet searching for "Emacs" and "text-conversion" only resulted in finding commit d4d9db8dc6e. Thank you! Joseph P.S. Sending this email from a phone, so I can't add you with X-Debbugs-Cc.