The Zerocam app has been on iOS since earlier this year and has already amassed a loyal user base that swears by the limited processing look.
With the free tier, you can only take 5 photos per day, but an annual $9.99 or $0.99 fee unlocks truly unlimited process-free photos.
*sigh* I fucking hate those sheeple.
If you want something like graphene or calyx (I.e. with additional de-googling and security improvements), take a look at DivestOS: https://divestos.org/pages/devices#device-blueline
Crdroid (which claims performance improvements, but also has a lot of customization options; reminds me of now deceased resurrection remix) is also good but doesn’t seem to officially support your device. There may be some ports on XDA, tho.
It’s good and everything (although it was a bit rough around the edges here and there), but is a no-go for me personally, unless they’ve changed their license. When I last checked it wad not open source, but merely source available since the license basically said you’re not allowed to modify the source code period. AGPL would’ve been a far better choice
In my case it was soundcore’s app (no, openscq30 didn’t work), so it had a need for network access to update the firmware, for example, I just didn’t want to give it at the moment. As for being poorly made, also not exactly: as I’ve mentioned, android gives this permission by default, and it’s reasonable to assume it stays so. Graphene basically “breaks userspace” here.