Rule of 3 - Direct & Inverse
iOS app by LUIS ANGEL RODRIGUEZ MARCOS. Utilities · LUIS ANGEL RODRIGUEZ MARCOS
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.1
- Listing last refreshed
- 2026-09-18
View the original store listing
Store description excerpt
Rule of 3 - Direct & Inverse: solve any proportion in seconds. Type three values and the empty box is calculated automatically. No formulas to remember. HOW IT WORKS - Direct rule of three: the more, the more. If 3 items cost $45, how much do 7 cost? - Inverse rule of three: the more, the less. If 4 workers take 6 hours, how long do 8 take? - The result updates instantly as you type - Your numbers are saved automatically: take a call, come back, everything is still there SIMPLE ON PURPOSE - Works completely offline - No accounts, no ads, no data collection - Free Perfect for shopping, cooking, work and school: scaling recipes, converting units, calculating prices, percentages and much more.
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