CalcTape Calculator with Tape

CalcTape is the calculator that works the way you think: type your whole calculation, see every figure, and change anything at any time.

What if a standard calculator, a classic desktop adding machine, and a notes app were rolled into one? That's CalcTape, your companion for everyday math: from a quick sum to a long, multi-step calculation. (CalcTape is not a scientific calculator, and for daily use, who really needs one?)

Ever run a long calculation and wondered:
"Did I enter that last number correctly?"
"Why does the result look off?"

With CalcTape you keep the full overview. Every number and operator stays visible, so you can check your work and correct any figure right in place, with all following results updating automatically. Forgot a value? Just add a new line where it belongs.

Place the cursor anywhere in the calculation and edit it freely, like a note. The moment you change a number or an operator, everything recalculates. Think of it as a spreadsheet with a calculator interface.

WHY YOU'LL LIKE IT
• Edit any figure in place: results update automatically
• See your entire calculation, not just the last result
• Comment your numbers and results, so it still makes sense weeks later
• Build reusable templates: swap the figures, get the answer in a breeze
• Percentages, thousands separators (including Indian digit grouping)
• Several keypad layouts, including a numbers-free function keypad, all reachable from the main screen
• Day, Night and System themes
• Reliable Undo/Redo and smooth editing, even in long calculations

MAKE IT YOURS
Keep only the buttons you actually use on your keypad, and create your own functions, for example to add a specific percentage with a single tap.

FREE VS PRO
CalcTape comes as a free version with the full tape calculator on your worksheet. The free version is for private use only. The Pro upgrade adds:
• Commercial use
• Save calculations as documents and manage multiple files
• Import, export, backup and restore
• Print your calculations
• Share via email and other apps
• Unlimited variables
• Fully customizable keypads: reassign any button, change button sizes, create your own

Found a problem or have an idea? We'd love to hear from you. Telling us your Android version and phone model helps us fix things faster.

Recent changes:
Fixed:
• Cursor jumping into the line above when the indentation adapted while typing.
• Cursor in the wrong place after switching apps.
• Rare freezes with very long documents.
• Crashes when moving the cursor on some devices, after a restart and when opening quick insert.

Thanks for your feedback!