Hmmm, I actually remember some of Android keyboard like that, it had two letters per key, so one tap - first letter, 2 taps - second letter. Allowed for bigger key size.
Worked a lot like a good old phone numpad, just faster. Crashed a lot.
Likely TouchPal: they supported Windows Mobile and Android back in the day :) It supported the "tap N times" feature too, as like a fancier QWERTY-ish T9
Worked a lot like a good old phone numpad, just faster. Crashed a lot.