The sum of your life.
One private account for every Sum app, end-to-end encrypted by design. Start with SumMoney: your money, summed up, privately, on your iPhone and Mac.
The suite
Every Sum app shares one account, one sign-in and the same rules about your data: sealed on your devices, with a key only you hold.
Private by design
Only you hold the key.
Your ledger is sealed on your own devices before it syncs. The SumOne relay only ever holds it sealed, so it can't open it. It keeps the newest sealed copy so a new device can catch up, and clears older ones out within 90 days. We can't read your ledger, and we can't give anyone a readable copy.
End-to-end encrypted
Your ledger is sealed on your device with a key only you hold. The relay that syncs it only ever sees ciphertext.
Local first
Your ledger lives on your devices and works offline, instantly. Sync keeps your iPhone and Mac in step whenever they're online.
Recoverable by you
Your Emergency Kit brings your ledger back on a new device: sign in, enter your twelve words, and your sealed copy comes down. Only you hold the key, so keep the kit somewhere safe.
A few features you choose, like connecting a bank, mean we hold a little on your behalf. The security page lists exactly what, and how each piece is protected.
One account
Sign in once. Every Sum app knows it's you.
One email, one code, one subscription managed on the web. Your account works on every device you own.
No passwords
Sign in with a one-time code sent to your email. Nothing to remember, nothing to leak.
Billing on the web
Your subscription is managed at sumone.app, never through an app store: one place for your plan, your invoices and your card. Early members get the founding rate.
Share with your people
Share an account with your partner or family. Only the people you invite can open it, and they see it on their own devices.