# privacy policy · updated 24 Sep 2026
Your numbers stay yours.
Sumi has no accounts, no analytics and no ads. We don't collect, sell or share any personal data.
sheets = on device
Everything you write is stored on your iPhone, iPad or Mac. We have no servers that receive or store your sheets. If you turn on iCloud sync (Sumi Pro, off by default), your sheets are also stored in your own private iCloud account, encrypted by Apple and not readable by us; turning it off keeps them on your device. If you delete the app with sync off, your sheets are deleted with it.
rates = anonymous
To convert currencies, Sumi downloads a public list of exchange rates from our server a few times a day. The request contains no personal information and nothing you have written. Standard server logs (IP address, time) are kept for up to 7 days to prevent abuse, then deleted.
tracking = none
No analytics, advertising or tracking SDKs. No cookies or identifiers. Sumi does not use Apple’s advertising identifier.
clipboard = on request
Sumi only writes to the clipboard when you copy a result or a sheet. It never reads your clipboard.
children = safe
Sumi collects no data from anyone, including children under 13.
Questions: [email protected]
# open-source licenses
Built with
OFL-1.1
JetBrains Mono
Typeface for sheets and numbers. © The JetBrains Mono Project Authors.
github.com/JetBrains/JetBrainsMono MIT
Attribution
Attribution
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