Support
Need help, found a bug, or want a feature? Email support@thumbs.work and we’ll get back to you.
Frequently asked
How do I do a conversion?
Type it the natural way — “10 km to miles”, “2 cups to ml”, “100 C to F”. Open the Library to see every supported unit, grouped into packs.
What math functions are supported?
A full scientific set: sqrt, log, log10, trig (sin/cos/tan and inverses), factorial (5!), gcd/mod, combinations, and constants like pi and e. Trig is in radians — add “deg” (e.g. sin(90 deg)) for degrees.
How do running totals work?
Numbers on consecutive lines form a block; type “sum” or “average” to total them. A blank line starts a new block. Use “prev” to reference the previous result.
Can I back up or move my thumbs?
Yes — Export from the thumb list to save a JSON backup (also Markdown, CSV, or text), and Import to restore from a file or the clipboard.
Is my data private?
Completely. Everything is stored on your device; there’s no account, tracking, or network. See the Privacy Policy.