10-Key Calculator

Will-i-am.dev

Contains adsIn-app purchases

About this app

10-Key Calculator, also called a ten key, brings the feel of a real adding machine to your phone. Type numbers, hit plus or minus, and watch a running total build on a scrolling paper tape, just like the printing calculators used for decades in bookkeeping and accounting.

Built for anyone who tallies numbers off a bank statement, spreadsheet, or receipt pile: bookkeepers, CPAs, small business owners, and anyone who wants a fast, no-clutter way to add up a column of figures. No account required, no unnecessary permissions. The free version includes a small ad below the keypad; 10-Key+ removes it entirely.

10-Key+ unlocks the full toolkit for a one-time purchase, no subscription:

• Multiply and divide, plus tax calculations (TAX+/TAX−) at your own rate
• Save and name multiple tapes, and switch between them any time
• Label any entry, and edit or delete past lines without losing your running total
• Reference numbers (invoice or check numbers) that print without affecting the total
• Optional Cloud Backup to your own Google Drive, so your tapes survive a lost or new phone

Clean greenbar ledger styling. Fast digit entry. Your running total, always visible.

What’s new

The Free tier now shows a short note about 10-Key+ when an ad can't load, instead of blank space. Windows and web Free users see the same note.