Should You Store a Crypto Seed Phrase on iPhone?
The usual advice is no: keep a wallet's seed phrase offline, on paper or a metal plate, somewhere safe. If you want a copy on your iPhone, never keep it as a screenshot or a plain note. An encrypted vault is the better place for that copy.
This page is about storage only. It is not financial advice.
Try Cryptile free: join the beta on TestFlight
What do I need to know?
- The phrase is the wallet. Anyone who reads it can usually move the funds, from any device, without your phone.
- A screenshot travels. Photos syncs to iCloud, shared albums, memories and backups.
- Offline copies cannot be hacked remotely. They can be lost, burned or found, so plan for that too.
Why is a screenshot in Photos a bad idea?
A seed phrase screenshot is an ordinary photo. It syncs to every device on your Apple Account and shows up to anyone who scrolls your library.
Apple's iCloud data security overview says Photos and iCloud Backup are not end-to-end encrypted under standard data protection. Apple holds those keys. With Advanced Data Protection on, Photos and iCloud Backup become end-to-end encrypted.
What about Notes or a password manager?
A plain note is as exposed as a photo. A locked note with its own password is much better. Our page on locked notes vs a vault app explains the difference.
Passwords in iCloud Keychain are end-to-end encrypted, according to the same Apple page. See Keychain vs a vault app for what each protects.
What do people usually do?
The most common setup looks like this:
- Write the phrase on paper, by hand. Do not type it into anything that syncs.
- Make a second copy. Paper or a stamped metal plate, which survives fire and water better.
- Keep the copies in two places. For example, a home safe and somewhere you trust away from home.
- Check each copy once. Read it back word by word against the wallet's own check, if it has one.
Follow your wallet maker's own instructions where they differ. They know their recovery process.
If I keep a copy on my iPhone, how do I do it in Cryptile?
- Open Cryptile and draw a pattern of at least 8 cells. A new pattern opens a new, empty vault.
- Write down that vault's 9-word recovery phrase on paper. There is no reset.
- Tap Add → Note (passwords, codes) and type the seed phrase. Do not paste it from the clipboard.
- Lock the vault. It also locks when you leave the app.
Typing beats a photo here. If you must photograph the paper copy, use Add → Take photo so it never enters Photos.
What this doesn't protect against
Malware on your phone can read whatever is on screen while the vault is open. Anyone who watches you draw your pattern can open the vault. A pattern is weaker than a long passphrase. If you lose both your pattern and your Cryptile recovery phrase, the copy is gone. The offline copy still matters most.
Do it with Cryptile
Cryptile encrypts notes, photos and files with AES-256-GCM under a key made on your device from your pattern. There is no account and no server, and the developer never holds your keys.
Cryptile is free for up to 2 vaults, 100 photos and 10 videos. Plus removes the limits and adds search inside the vault and the panic pattern, for $19.99 a year (7-day free trial) or $39.99 once.