What’s that one app on your phone that is utterly invaluable to you specifically. Maybe it’s got a super small use-case, but for you, and you alone it’s absolutely invaluable.
I’ll get us started…
It’s a small all that allows me to stitch photos together. I usually use it to stitch screenshots together. It’s got a nice interface and is absolutely fantastic at the one thing I need it to do.
What about you?
Allows you to resize images and arrange them on a page to print. I use it to print coloring pages for my kid.
Kvaesitso
A very different concept for a launcher. It’s very widget focused.
RethinkDNS
Help me to give more control on my Android, configuring a firewall, VPN and canceling acess some apps to internet.
Macrodroid, hands down. Lets you automate almost everything on your phone (and not on your phone), and it’s remarkably friendly to use.
Tick Tick, best reminders app I’ve tried (and I’ve tried a lot)
I use Obtainium to keep a lot of rtuff up to date on Android.
F-droid is great, but Obtainium allows me to keep everything up to date and get it directly from the developers.
For my Retroid Pocket 3 Plus Obtainium has been so good at keeping my emulator hoard up to date.
Never even considered that. But, my handheld is an older one that doesn’t run Android. I’ll remember that next time I’m looking for an upgrade.
This fastest and most convenient launcher ever:
This is always the first app I install on every new phone I purchase.
Any tangible battery improvement?
Netguard.
Gives per app connectivity options.
Findroid - For watching and syncing my Jellyfin library to my phone to watch films and TV on my commute.
Newpipe - I use to sync YouTube videos offline and background play etc.
Spectdroid - I’m a sound designer and having quick access to spectral info is great.
Mini Piano Pro - Always using this to check what key a track is or what a note is.
Fitbit - I use this to track my macros for my weight training.
Kiwi Browser - Browser with Adblock and chrome plugins. I guess I use this a lot to access the front end management apps on my home server.
Genius Scan - Really good pdf scanner.
Tuner (Boss) - Guitar tuner.
Total Commander - Good file manager for my network.
Termux - Terminal emulator.
I think those cover the jist of the question. I like apps like Ampere but don’t think they quite fall into the category you’re enquiring about. I imagine the niche side of your request would put Spectdroid as number one, a bunch of the others are pretty obvious after rereading your question.