Use cases
Real situations, real privacy
Most private-photo problems aren't about hackers — they're about everyday moments. Here's how Arca handles the ones people run into most.
Handing over your phone
Showing one photo shouldn't expose your whole library — or your vault.
Read moreSelling your iPhone
Don't let private photos ship out with your old device.
Read moreShared & family devices
Private photos on a device other people unlock every day.
Read moreOut of iCloud
Some photos shouldn't sync anywhere. Keep them fully local.
Read moreWhy the everyday cases are the ones that matter
Almost nobody loses private photos to an attacker who broke encryption. They lose them the ordinary way: a phone handed over unlocked, a trade-in that was never properly wiped, a shared iCloud account nobody thought about, a repair that required the passcode.
That distinction changes what a defence has to do. Against a remote attacker, a strong passcode is most of the answer. Against the everyday cases, the passcode is already surrendered — you handed the phone over, or the shop needed it, or the photos synced somewhere before you thought to stop them. What helps is a second boundary inside the device: photos that stay encrypted whether or not the phone is unlocked, and that never pass through the Camera Roll on their way in.
Each page below takes one of those situations, describes what iOS does and does not protect on its own, and explains where a vault changes the outcome. Where the built-in tools are genuinely sufficient, they say so.
If you want the underlying design instead of the situations, the security page covers how the encryption works, and the comparisons cover how it differs from other vault apps.
Your photos. Truly private.
Download Arca and lock your first photos away in under a minute. No account, no cloud, no one but you.
Free to download · iPhone · iOS 18+