Imawa (今は) is a Watch app that teaches you to read the date and time in Japanese. It contains various short and long date/time formats and shows you how to read it in kanji, hiragana and romaji.
With enough practice you’ll finally remember all the oddities like 六分 = ろっぷん not ろくふん.
Version history
1.30
2022-10-03
Added katakana
1.20
2022-09-17
Date and time automatically syncs with system clock.
1.10
2022-08-27
Added haptic feedback for when you tap on a date/time to change its format.
1.0
2022-08-21
Download Imawa - Japanese Date/Time on Android and iPhone for free