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Simple Mobile Tools is being sold to a for-profit firm ZipoApps
(programming.dev)
Simple Mobile apps have been very popular among FOSS enthusiasts. I've personally been using the Gallery, Contacts and the Phone app since a few years now. It's a shame that it has come to this, will be on the lookout for their forks.
Aves Libre is already a far better gallery that you should be using even if this wasn't happening.
It doesn't have a video editor AFAIK. Any FOSS video editors around?
ffmpegin termux ๐https://f-droid.org/en/packages/protect.videoeditor/
That's a video transcoder. Simple Gallery could crop videos, trim videos, merge them, add filters, text, music and what not. Good thing it's forked by one of the devs who plans to maintain it.
It allows you to trim videos, but yes, not any other functions you mention.
I like the interface, but I miss the ability to show/lock hidden albums/folders with fingerprint.