Version 1.2 · iPhone and iPad
SilentBox keeps photos, scans, PDFs and any other file encrypted on your iPhone and iPad. Encryption happens on the device. We do not have the key and cannot read your content.
Free for 14 days. Then a one-time purchase — no subscription.
iOS 18 or later · iPhone and iPad · no account
Ten things it was built for. The rest others do too.
Files are encrypted on your device before they’re saved, and the vault keeps no readable copy — not even a thumbnail. The key is created on your device and never leaves it, so we couldn’t open your vault even if someone made us.
A glance unlocks the vault, and it locks again when you leave the app or stop using it. Turn on the front-camera check and it stays open while you’re in front of the screen. Nothing is recorded or sent anywhere.
An album can have its own lock — Face ID, a PIN or your vault password. Until you open it, its items stay out of search, the trash and expiration reminders. A vault inside the vault, for when you hand someone your phone.
Turn on two-step unlock and the vault asks for your PIN every time — even after Face ID or your password. Someone who holds your phone up to your face, or has seen your password, still can’t open it on this device. Forgot the PIN? Your recovery phrase resets it.
Album covers show what’s in each album, and you pick which photo becomes the cover. Hide or blur covers and item previews for the whole vault, a single album or one item. What the album list and the grid reveal is up to you.
Add photos and videos from your library, any file from Files, a new photo from the camera, or a scan that’s cropped and straightened into a multi-page PDF. ID cards and insurance papers can remind you before they expire.
Text is recognized on your device and searched along with file names, and accents don’t get in the way — “skoda” finds “Škoda”. The search data is encrypted alongside your content and never leaves the vault.
Sync is off until you turn it on, and you choose which albums sync. Only encrypted data goes to your own iCloud storage, never to our servers. An album shows a filled cloud only when everything in it has arrived, and tells you when an item is still waiting for another device. An item stays in iCloud until you delete it for good or take its album out of iCloud.
Videos stay in iCloud until you play them, so a second device doesn’t fill up with files you may never watch. Downloads show their progress, and you can stop them at any time.
Put your phone face down and the vault locks. If you like, Mail or Messages opens in its place. You can also block screen capture: screenshots come out black and screen recordings stay covered, from the album list to an open photo.
Export plain files at any time, with their photo metadata intact — free, even after the trial. With the full version, you can also save the whole vault as one encrypted archive and restore it on any device. A vault is only as trustworthy as it is easy to leave.
Security cannot be tried out with a tap, so here at least is what it rests on.
The master key is 256 random bits, never derived from your password — the password only unwraps a copy of it. It exists in memory only while the vault is open; on disk and in the Keychain it is always wrapped.
Import reads in blocks, encrypts in memory and writes nothing but unreadable data. A plaintext copy never lands on disk — not even when you share into it from another app.
File names, albums, dates and extracted text sit in the same envelope as the content. A name like “biopsy-results.pdf” is sensitive on its own.
A forgotten password means lost data — that is a consequence of us not having the key, not a bug. Which is why twelve words on paper belong with the vault, printed when you create it.
A promise we cannot keep is worse than a missing feature. These are the limits, written down before anyone has to ask about them.
Start the free trial in the app. Nothing is charged automatically, and there’s no subscription.
If you don’t buy, your vault still opens, and you can search it and export your files. Only adding items, new albums and sync stop.
Free for 14 days, then a one-time purchase to keep adding. No account, no subscription. Your vault always opens, even if you don’t buy. Requires iOS 18 or later on iPhone or iPad.
SilentBox