- Updated German (old) alphabet to spell "2" as "zwo" (as preferred in radio communication to avoid confusion between "zwei" and "drei") [thanks, Ralph]

- Extended the history length to 20 items [thanks, G.L.]

- Added Austrian and Swiss spelling alphabets [thanks, Y.R.]

- Added new German spelling alphabet (2022+) [thanks, Nikolas]

- Added Phoenix PD spelling alphabet [thanks, D.F.]

- Added input history
- Refined user interface
- Removed ad banner

(Starting from this version, the app requires at least iOS 13.)