# PrimeCalc vs Binary Calculator SDG

The clearest difference is update cadence: PrimeCalc at every 5 weeks against Binary Calculator SDG's every 12 months. On price, ads, in-app purchases and device support there is nothing between them.

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

PrimeCalc ships an update every 5 weeks, Binary Calculator SDG every 12 months. The most recent releases landed on September 10, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | PrimeCalc | Binary Calculator SDG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 5 weeks** | Every 12 months |
| Size | 12 MB | 12 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yutaka Nakao](https://appshunter.io/developer/1303008060) | [SDG CODE DOO NIS](https://appshunter.io/developer/1343251532) |

## What reviewers say

### PrimeCalc

[App page](https://appshunter.io/ios/app/primecalc-modprime-factor/id1332239791)

**Features:** macOS Compatibility

**In-app purchases:** none


### Binary Calculator SDG

[App page](https://appshunter.io/ios/app/binary-calculator-sdg/id6741471372)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PrimeCalc free?

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

### Is Binary Calculator SDG free?

Binary Calculator SDG is free to download, with no in-app purchases.

### Do PrimeCalc or Binary Calculator SDG have ads?

Both PrimeCalc and Binary Calculator SDG show ads.

### Which is updated more often, PrimeCalc or Binary Calculator SDG?

PrimeCalc ships an update every 5 weeks, and Binary Calculator SDG every 12 months. Most recently, PrimeCalc was updated on September 10, 2026 and Binary Calculator SDG on September 14, 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.*