
Prozent – Percent Calculator
VAT, Tip, Margin & % Change
0 ratings
Free
About
Prozent writes every percentage calculation as a sentence you can read at a glance. Enter your numbers and the answer appears at the end: 15 % of 200 = 30.
All eight calculations are on one screen at the same time, so you never have to switch screens to find the right one.
EIGHT CALCULATIONS AT A GLANCE
• Percent of – 15 % of 200 = 30. Also shows 1 % and 10 % of the base, handy for mental maths.
• Plus or minus % – 200 plus 19 % = 238. Switch between plus and minus and see the amount added or saved and the factor (1.19).
• Share in percent – 50 of 200 = 25 %. Also shows the difference and the rest to 100 %.
• Base value – 50 = 25 % of 200. Find the whole amount from a part, with the difference and the rest.
• Change – 200 → 250 = +25 %. Shows the difference, the factor and the way back (−20 %).
• VAT – 100 net + 19 % = 119. Switch between net and gross to calculate in both directions. The VAT amount, net and gross are always shown.
• Tip – 48.50 + 10 % ÷ 2 = 26.68. Add a tip and split the bill: per person, total and tip.
• Margin – Cost 40 price 99 = +59.60 %. Enter cost price and sale price to see margin, markup and profit.
UNDERSTAND THE NUMBERS
Every calculation comes with a one-line explanation. Tap it to read more about the terms, for example why margin and markup are not the same, or why the way back is a different percentage.
QUICK TO USE
• A custom keypad slides up, with quick percentages 5, 7, 10, 15, 19, 20, 25 and 50 % for percentage fields.
• A Next key takes you to the next field, plus Clear and backspace keys.
• Tap a result to copy the plain number. A small bar then lets you share the full sentence, for example “15 % of 200 = 30”.
• Your inputs and settings are remembered.
FREE AND PRIVATE
Prozent is free. No ads, no in-app purchases, no account and no tracking. The app collects no data and works completely offline.
MAKE IT YOURS
• Default tax rate: 19, 7, 20, 25 or 0 %
• Decimal places: automatic, exact, 0, 2 or 4 – “exact” rounds nothing away
• Currency symbol: none or one of 15 – €, $, £, CHF, ¥, ₹, zł, Kč and more (shown on money amounts only)
• Explanations on or off
• Appearance: system, light or dark
• Language: English or German
• Reorder or hide calculations
• Reset everything
EASY TO READ
Large, bold type on a warm, paper-like background with a fine grid and a dark header. Light and dark mode are both included. Prozent follows the text size you set on your iPhone and supports the built-in screen reader.
Made by OS Factory.
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What's New in Prozent
1.0.1
October 18, 2026
After you have used the app for a while, it now asks once whether you would like to rate it – at most once a year. Plus small improvements.





