# Prime Checker vs Binary Code Toolkit

The clearest difference is price: Prime Checker at Free against Binary Code Toolkit's $1.99. Prime Checker also leads on update cadence (every 17 months vs every 37 months) and device support (4 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

Prime Checker is free to download; Binary Code Toolkit costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Prime Checker ships an update every 17 months, Binary Code Toolkit every 37 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Prime Checker | Binary Code Toolkit |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/prime-checker/id389112910/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 95.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 17 months** | Every 37 months |
| Monetization | Free | — |
| Size | 3 MB | 10 MB |
| Requires iOS | **12.4** | 13.2 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Heart Solutions, Inc.](https://appshunter.io/developer/389112913) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## 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


### Binary Code Toolkit

[App page](https://appshunter.io/ios/app/binary-code-toolkit/id1602413528)

**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 Binary Code Toolkit free?

Binary Code Toolkit costs $1.99, with no in-app purchases.

### Do Prime Checker or Binary Code Toolkit have ads?

Neither Prime Checker nor Binary Code Toolkit shows ads.

### Which is updated more often, Prime Checker or Binary Code Toolkit?

Prime Checker ships an update every 17 months, and Binary Code Toolkit every 37 months. Most recently, Prime Checker was updated on September 29, 2026 and Binary Code Toolkit on October 3, 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.*