I’ll approach this a bit differently as all the great apps have been mentioned.
Greyscale mode
Maybe I’m being esoteric here, but I think this a great counter to addictive usage habits for a device. Our privacy is often compromised by our habits, and social media relies on color and dark patterns to keep us in their data collection machine.
I find that leaving my phone or computer in greyscale makes me rethink how I use my screened devices. It’s easy to say “use your phone less”, but it’s harder to do it consistently.
Also, any good RSS feed app (Feeder is great). It’s shocking how many people use Reddit as their only source of news.
Now I’m wondering if there’s an app, widget or android shortcut to alter greyscale mode as I wish. I’m if there isn’t one already it should be somewhat simple with some “ChatGPT” to setup something like this.
Unison, an extremely underrated tool to sync files across devices over SSH/SFTP. I have very little need for cloud backups with this setup. Of course off-site backup is important in case your house burns down.
QOwnnotes, hands down the best note taking tool out there
Radicale as CalDAV server, plus Evolution (Linux) or aCalendar+DAVx5 (Android) + Tailscale, for free self-hosted personal calendar and TODO list.
Rush, an app to get lyrics for songs. Can detect currently playing songs from notifications automatically
Daily You, take a photo everyday of yourself with a short description so you remember what you have done every day
Quillpad, my note app. Syncs with Nextcloud notes so really practical to use
Thumb-Key as my main keyboard (yes it is weird) and HeliBoard and I want to allow other people to type on my phone
OSS Document Scanner & OSS Card Wallet, really cool replacement for Adobe Scan here
Find My Device with my self-hosted server, but you can the flagship instance which will be already better than Google’s service
Buckwheat, really simple budget manager. (you set an amount and a period and you can then add expenses. you can export to csv to track an actual budget)
Stratum for 2FA
Etar as my calendar, the prettiest I found in my opinion
Bura as my weather app
Moshidon for my Mastodon Client, slighly better than the official app
On Samsung, you can set an accessibility shortcut to greyscale mode and screen dimming. My old Samsung showed this as a tiny icon on the navigation bar.
On my current Graphene Pixel, I put “color correction” in my quick actions when swiping down. Same with the extra dim function for dark rooms.
Most of the time, I develop my own apps when I need something, it’s quite quick to do it with Claude (such as a flac to mp3 converter, a music player, stegano tools etc.)
at least not a convenient way, and I’m fine with that.