# Prime Checker vs GraphMath

The clearest difference is update cadence: GraphMath at fortnightly against Prime Checker's every 17 months. GraphMath also leads on ratings volume (12 vs 3). Prime Checker's advantage is iOS requirement (12.4 vs 15.6). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Prime Checker against 5.0 for GraphMath. Both are backed by a comparable volume of ratings — 3 and 12 respectively. Written reviews are what separate them: 96% of Prime Checker's written reviews are positive against 100% of GraphMath's.

Prime Checker ships an update every 17 months, GraphMath fortnightly. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Prime Checker | GraphMath |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/prime-checker/id389112910/reviews) | [5.0 (12 ratings)](https://appshunter.io/ios/app/graphmath/id1582680101/reviews) |
| Number of ratings | 3 | **12** |
| Positive reviews | 95.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 3 MB | 6 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heart Solutions, Inc.](https://appshunter.io/developer/389112913) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Prime Checker

[App page](https://appshunter.io/ios/app/prime-checker/id389112910)

This app performs advanced mathematical calculations for numbers, including integer factorization, Euler's totient function, and solving specific Diophantine equations. It utilizes advanced algorithms for factorization and primality testing.

**Highlights:** Integer factorization, Euler's totient function, Primitive root calculation, Diophantine equation solver, Primality testing

**Features:** macOS Compatibility

**In-app purchases:** none


### GraphMath

[App page](https://appshunter.io/ios/app/graphmath/id1582680101)

This powerful graphing calculator visualizes complex mathematical functions in 2D and 3D. Explore Cartesian, cylindrical, and spherical coordinates with animated graphs and detailed tables of points. It offers features like derivatives, integrals, and intersections for comprehensive mathematical analysis.

**Highlights:** 3D graphing (Cartesian, Cylindrical, Spherical), 2D graphing (Cartesian, Polar, Parametric), Animated graphs, Detailed point tables, Derivative and integral calculations, Intersection point finding, Undo/redo functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prime Checker free?

Prime Checker is free to download, with no in-app purchases.

### Is GraphMath free?

GraphMath is free to download, with no in-app purchases.

### Which has better reviews, Prime Checker or GraphMath?

Prime Checker and GraphMath are both rated 5.0 out of 5 on the App Store, from 3 and 12 ratings respectively.

### Do Prime Checker or GraphMath have ads?

Neither Prime Checker nor GraphMath shows ads.

### Which is updated more often, Prime Checker or GraphMath?

Prime Checker ships an update every 17 months, and GraphMath fortnightly. Most recently, Prime Checker was updated on September 29, 2026 and GraphMath on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*