I've been using a small suite of apps on my iPad to study Japanese (日本語).

☞ https://apps.apple.com/app/id939540371 Language Drops

☞ https://apps.apple.com/app/id570060128 Duolingo

☞ https://apps.apple.com/app/id290664053 Japanese (dictionary)

I spend about a half hour per day on it. The first two apps are oriented around five minute sessions. I pause to use the dictionary so I can practice entering hiragana (input method / keyboard) to find the kanji (漢字) which shows similar words, kanji stroke order, and plenty of example sentences (with romaji, kanji, and furigana).

My current lesson streak is just over 90 days long.