The Pro version, the one I use, claims to collect no data at all. Not sure how much I trust that.
Maybe it's time to look for a new gallery app...
EDIT:
The open source code has not been updated since 2023, and neither has the Pro app. However the non-pro app has been updated in 2024.
Therefore, it might be safe to use the open source code version on GitHub, but I wouldn't touch the free one on the play store.
I wouldn't use the Pro version on the play store as you would be funding these companies and they could push an update in the future.
EDIT 2:
As mentioned here, a popular fork of many of these now abandoned Simple apps is the Fossify project. If you liked the app I'd recommend looking at that if you want to keep getting security updates at the very least.
Given how many “former” spies from the Israeli Unit 8200 are now in high level positions at Facebook, I’d say any Meta app is a concern for Israeli spying.
And yet, if you look them up you'll find many of them have tens of millions of downloads. It's crazy the types of random shit people thoughtlessly download from the Play Store. The North Korean spy agency also had spyware apps on there until recently, targeting South Korean users.