225+ iOS apps curated and reviewed
Calculator is the household name in scientific calculator free rpn, but it's far from the only option. We track 225+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (3) | No | No | Sep 2026 | |
| 2 |  | Free | 3.8★ (22) | No | No | Aug 2026 | |
| 3 |  | $0.99 | 2.3★ (3) | No | No | Jul 2026 | |
| 4 |  | $3.99 | 4.8★ (238) | No | No | Sep 2026 | |
| 5 |  | Free | 5.0★ (1) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 4.9★ (7) | Yes | No | May 2026 | |
| 7 |  | $4.99 | — | No | No | Sep 2026 | |
| 8 |  | Free | 4.3★ (332) | No | No | Sep 2026 |
This app offers a comprehensive scientific calculator with advanced functions for math, finance, and engineering. It includes unit and currency conversion, a constants library, and a biorhythm calculator for daily insights. The interface is intuitive and supports multiple calculation modes.
This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.
This calculator app uses Reverse Polish Notation for powerful calculations. It offers customizable color schemes, layouts, and online help, designed for flexibility and usability. All features are unlocked with a one-time purchase.
