• Seal: Allows me to download YouTube videos, Instagram reels, etc. It’s a simple and pretty front end for yt-dlp.
• Fossify Calendar: Finally kicked Google Calendar to the curb. No fuss calendar app.
• AVNC: Allows me to remotely control my laptop from my phone. Requires installation of VNC software on the laptop (I’m using TightVNC).
• Binary Eye: Barcode/QR code scanner with history.
• Loop Habit Tracker: Helps me keep track of habits – eg. going to the gym X times a week.
• Island: Allows me to create a clone of app. Useful for apps that don’t support multi-accounts.
• Simple Time Tracker: I use it to keep track of how long I spend playing a game, since I like documenting the info for HowLongToBeat.com

Other than these, K9 Mail and NewPipe.