The Formula Calculator
Sidney Thom Reference iPhoneiPadiPod touch
The Formula Calculator is a free Reference app for iPhone and iPad by Sidney Thom. Requires iOS 15.0. Updated October 19, 2026.
- Price
- Free
- on the App Store
- Size
- 9 MB
- Age 4+
- Updated
- Oct 19
- 2026 · v1.3.3
Screenshots
About The Formula Calculator
Select a formula, enter the values – the app calculates the rest. Units convert automatically. Formula Calculator is a formula library and a calculator in one. Instead of looking things up in a handbook and then calculating separately, both happen in the same view. Built for the trades, master craftsman training, engineering and study. Over 200 formulas, including: Geometry and areas, volume, mechanics and strength of materials, heat, fluid mechanics and pumps, electrical engineering, acoustics, hydraulics, chemistry and physics. Use the formulas, instead of leaving everything to AI: Periodic table (use molar mass directly), density table, building materials, formula symbols as in a technical handbook, unit converter with SI prefixes. Charts such as LogPH and h-x. Search finds formulas, elements and groups – for example Ohm, area of a circle, alkali metals or the periodic table. • Fully offline • No account, no ads, no tracking • Light and dark mode • German and many other languages • Saves recent calculations Developed by a German master craftsman. Available languages: German, English, French, Spanish, Portuguese, Italian, Dutch, Polish, Czech, Slovak, Hungarian, Romanian, Croatian, Danish, Swedish, Norwegian, Finnish, Turkish, Russian, Ukrainian, Arabic, Hebrew, Hindi, Thai, Vietnamese, Indonesian, Chinese, Japanese, Korean Also on Apple Watch: a simplified version for quick lookup or calculations with units.
What’s new
Version 1.3.3 · Updated October 19, 2026
Bugs fixed - better design
App privacy
The developer, Sidney Thom, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to The Formula Calculator
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| The Formula Calculator | – | Free | October 19, 2026 | |
| BIG KAISER | 5.0 / 5 (4) | Free | May 21, 2026 | Compare |
| Museum Folkwang | – | Free | Jun 27, 2026 | Compare |
| Kuran Bilmek Kelime Mana Meal | 5.0 / 5 (11) | Free | Sep 19, 2026 | Compare |
| TeacherTool Complete | – | Free | Oct 1, 2026 | Compare |
| Coin Identifier・Snap & Scanner | 4.4 / 5 (53) | Free | Feb 19, 2025 | Compare |
| Triangle & Angle calculator | 4.1 / 5 (217) | Free | Oct 2, 2025 | Compare |