00 · Introduction
The calculator that remembers.
A tape calculator for iPhone. Every calculation stays on the tape and can be corrected at any time. Free, no ads, no tracking. Full for a one-time price.
iPhone · iPad · Apple Watch · free
The app does this.
01Tape
Every calculation stays.
The tape remembers every step. Go back to any row, change a number, add a note or exclude an item. The result updates at once. And you always see where it came from.
- Correct any line
- A note on every line
- Exclude an item without deleting it
- Repeated = (5 + 3 = = =)
- Memory M+ M− MR MC
02Say it
Say it. It does the math.
Type or dictate a sentence and DIGITCA pulls out the numbers, the operations and the context. It writes them to the tape as separate lines, so even a spoken calculation can be checked.
- Text and voice
- VAT, tip, discount
- Numbers in words: one hundred fifty
- English, Czech and more languages
03Converter
161 currencies. Ten unit categories.
Convert a currency right in the middle of a calculation and carry on without retyping. Crypto, kilometers, degrees or liters to gallons are just as easy.
- 161 currencies and crypto
- Rates update online
- Offline: last known rates
- The result goes straight to the tape
04Archive and vault
Save it. Come back. Lock it.
Name every tape, save it and reopen it whenever you like, say half a year later at tax time. Whatever nobody else should see goes into the vault.
- Named tapes
- Vault behind Face ID or PIN
- Password-protected tapes, AES-256 encryption
05Export
Calculate. Pass it on.
Send the whole calculation as a PDF, a spreadsheet or text. The recipient sees every item, not just the final number. And if you like, the tape becomes a video too.
- CSV with semicolon or comma by language
- Video for Reels and Stories
- No watermark in Full
06Scientific mode
Sin. Cos. Tan. And 27 more.
Swipe left on the keyboard and work with logarithms, roots or trigonometry. The tape keeps running, nothing to switch, nothing lost.
- Degrees and radians
- Ans: the result straight back as input
- Brackets and EE
- x̄ and σ from the tape
07Palettes
Twenty palettes.
Four are free, Full unlocks the rest. Click one and the calculator changes color, just like in the app.
08Price
Once and for ever.
DIGITCA
Free to download
- Tape with corrections and notes
- Natural language and voice
- Converter: 161 currencies, 10 categories
- Scientific mode
- 4 palettes, Flat and ABS keys
- Archive for one tape
- Share as an image or .digitca file
- No ads, no tracking
DIGITCA Full
€4.99 · one-time · Family Sharing
- 16 more palettes
- 19 app icons
- Acrylic and Machined keys
- 6 number fonts, 5 sound packs
- Unlimited archive + vault
- Export: PDF, CSV, video, card, print
- No watermark, no subscription
Free to download. Unlock Full inside the app.
★Reviews
“At first I thought: nice enough calculator. Then I found the currencies. Then the temperature converter and tons of other units. And suddenly I’m looking at more designs, sharing options and so on. Great app!”
It remembers, it calculates, you can dictate to it. It handles the vast majority of what a person needs today with ease! Exporting intermediate and final results is just a very pleasant bonus.
Super minimalist calculator (and more) that’s a joy to use. Everything runs smoothly with zero clutter, the ideal choice for anyone who appreciates clean design.
Great calculator, does what it promises. Beautiful themes, a pleasure to use.
?Questions
What is a tape calculator?
A tape calculator displays each calculation on a separate line, similar to a classic adding machine with a paper tape. Unlike a standard calculator, it remembers the full history of a calculation, which can be edited at any point.
How is DIGITCA different from the iPhone's built-in calculator?
DIGITCA saves every step of a calculation to a tape that can be edited or shared at any time. It also supports natural language and voice input, a scientific mode, a converter for 161 currencies and 10 unit categories, a named tape archive, and export to PDF, CSV or video.
Is DIGITCA free?
DIGITCA is free to download. For free you get the editable tape, voice input, the converter, scientific functions and an archive for one saved tape. DIGITCA Full, a one-time purchase, adds an unlimited archive, the vault, the full export set and more looks. No subscription.
Does DIGITCA work offline?
Yes. All calculations, tape editing and export work offline. Currency rates update when connected to the internet, but the app works with the last saved rates as well.
Does DIGITCA have a scientific mode?
Yes. The scientific mode has thirty functions: trigonometry including inverse and hyperbolic variants, logarithms (also with a custom base), powers and roots, factorial, nCr, nPr, mod, π, e, Ans, plus mean and standard deviation of the tape. Parentheses and EE notation are there too. Activate it by swiping left on the standard keyboard.
Which devices does DIGITCA support?
DIGITCA runs on iPhone and iPad with iOS 17 or later, with a standalone calculator on Apple Watch. The DIGITCA Full purchase supports Family Sharing.
§Author
Why DIGITCA looks the way it does.
You grew up with calculators that were things. They had weight, they clicked, they smelled of plastic. The digits glowed orange on a black display and there was something reassuring about them that today's apps have lost.
Aesthetics aren't a luxury. They're respect for the person holding the app.
DIGITCA is a tribute to the old, reliable machines that simply calculated. No subscription, no account, no ads and no unnecessary tracking.
They just calculated.
