100% Percent Calculator
Tip, tax, discount & margin
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Ask in plain English, split any bill, and see foreign prices in your own currency. 3.0 is the biggest update ever — with the new on-device AI Assistant.
The percent calculator that asks you the right question, instead of making you remember the formula.
WHAT YOU CAN CALCULATE
• Discount: how much off, or the final price after X% off
• Sales tax / VAT: add or remove tax from a price
• Tips: how much to leave, or what percentage someone tipped you
• Profit margin & markup: for shop owners pricing inventory
• "What percent is X of Y" and the rest of the basics
REAL-LIFE USE CASES
At the till deciding if "30% off" is actually a good deal. Adding VAT to a quote for a client. Splitting a restaurant bill after a couple of drinks (we've all been there). Pricing your own products with the right margin. The app is built around "what are you trying to figure out?" — not "here are all the buttons, good luck."
CONVERTERS
• Length and imperial ↔ metric, built in
• Live currency conversion with daily exchange rates (Pro)
PRO — ONE-TIME PURCHASE
Pro is a single purchase. No subscription, ever.
• Calculation history — tap any past result to copy it
• Custom default values per calculator (e.g. always pre-fill your usual tax rate)
• Live currency converter
• Unlimited favorite calculators (free users get one)
• Pick your accent color
Built and maintained by a one-person indie studio. Buying Pro once keeps the lights on.
Changing currencies is finally simple! Separate rows for what you're converting from and what you're converting to, so either one takes a single tap.
NEW
• Seven more currencies: Czech koruna, Hungarian forint, Icelandic króna, Israeli shekel, Malaysian ringgit, Philippine peso and Romanian leu.
• After each update, a short summary of what changed opens automatically. Read it again any time from Settings, or switch it off there.
IMPROVED
• The currency converter has its own From and To rows, so changing either side is one tap.
• Tap any currency code to search the full list by name or code.
• Travel Mode is down to the essentials: pick your two currencies and turn it on.
FIXED
• The Russian ruble and the Taiwan dollar have been removed. The daily exchange rates never covered them, so choosing either produced no result.
The developer, Thomas Andre Johansen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Thomas Andre Johansen
- Size
- 5.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 15 more
- English, Danish, Dutch, French, German, Italian, Japanese, Korean, Norwegian Bokmål, Portuguese, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 100% Pro $19.99
- Large $2.99
- Small $0.99
- Medium $1.99
- Copyright
- © 2026 Thomasaj.com