Glad to see many apps I already use here! Just to add ones I haven’t seen mentioned:

• Lichess - the best chess
• Paseo - simple step counter
• Wikipedia - duh
• Gmaps WV - for when other maps fail
• Openreads - amazing and underloved books / reading tracker
• SherpaTTS - offline text to speech
• Whisper+ - offline speech to text
• FairEmail - email client
• Fcitx5 - Chinese keyboard
• AnkiDroid - Anki flashcards