249+ iOS apps curated and reviewed
The best free calculator apps on iPhone average 4.6★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.9★ (243K) | Yes | No | Sep 2026 | |
| 2 |  | Free | 3.0★ (8.9K) | No | No | Sep 2026 | |
| 3 |  | Free | 4.2★ (1.4K) | No | No | Sep 2026 | |
| 4 |  | Free | 4.7★ (1.7M) | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 4.9★ (409K) | Yes | No | Sep 2026 | |
| 6 |  | Free | 4.7★ (15K) | Yes | Yes | Sep 2026 | |
| 7 |  | Free | 4.7★ (14K) | Yes | No | Sep 2026 | |
| 8 |  | Free | 4.7★ (83K) | No | Yes | Sep 2026 |
Perform essential arithmetic operations with a straightforward calculator app. Its large buttons and clear display ensure ease of use, supporting both portrait and landscape orientations.
This app offers both basic and scientific calculators for quick solutions to mathematical expressions. It also features a "Math Notes" function that allows users to type or write out equations and see them solved inline, with support for variables and graphing.
A straightforward and reliable calculator application designed for iPad and iOS 9. It offers a standard calculation experience with a charming piano sound effect and is optimized for high-resolution screens.
