Janus Calculator
Geoffrey Domm Productivity iPhoneiPadiPod touch
Janus Calculator is a free Productivity app for iPhone and iPad by Geoffrey Domm. Rated 2.0/5 from 1 ratings. Requires iOS 26.2. Updated April 29, 2026.
- Rating
- 2.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 1 MB
- Age 4+
- Updated
- Apr 29
- 2026 · v2.3
Screenshots
About Janus Calculator
Two-sided calculator. Side A uses Standard Notation, Side B uses Reverse Polish Notation. Both calculators are programmable, include various finance and scientific functions, and the values of 45 physical constants. Also includes a Black-Scholes option calculator, including calculation of implied values for each of the inputs.
What’s new
Version 2.3 · Updated April 29, 2026
Update to IOS26
App privacy
The developer, Geoffrey Domm, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Janus Calculator | 2.0 / 5 (1 rating) | Free | April 29, 2026 | |
| Squiddle | 5.0 / 5 (1) | Free | May 11, 2026 | Compare |
| progr dashboard | – | Free | May 26, 2025 | Compare |
| Calc-50 | 3.7 / 5 (3) | Free | Dec 25, 2025 | Compare |
| Sokuten: Survey Calculator | – | Free | Oct 6, 2026 | Compare |
| RPN-67 Pro | 4.3 / 5 (6) | 4.99 USD | Apr 9, 2026 | Compare |
| Calculator of Formulas | 5.0 / 5 (1) | Free | Jan 25, 2026 | Compare |
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