# PRCalc Tracker vs UnitHub

The clearest difference is update cadence: UnitHub at every 8 days against PRCalc Tracker's every 3 weeks. UnitHub also leads on iOS requirement (15.1 vs 17.6). 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.

PRCalc Tracker ships an update every 3 weeks, UnitHub every 8 days. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PRCalc Tracker | UnitHub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 1 MB | 39 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SEUNGYONG YU](https://appshunter.io/developer/1488562262) | [ClickWebstudio Technologies Inc.](https://appshunter.io/developer/1837851468) |

## What reviewers say

### PRCalc Tracker

[App page](https://appshunter.io/ios/app/prcalc-tracker/id1488562263)

**Features:** macOS Compatibility

**In-app purchases:** none


### UnitHub

[App page](https://appshunter.io/ios/app/unithub-unit-converter/id6752350531)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PRCalc Tracker free?

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

### Is UnitHub free?

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

### Do PRCalc Tracker or UnitHub have ads?

Neither PRCalc Tracker nor UnitHub shows ads.

### Which is updated more often, PRCalc Tracker or UnitHub?

PRCalc Tracker ships an update every 3 weeks, and UnitHub every 8 days. Most recently, PRCalc Tracker was updated on October 8, 2026 and UnitHub on October 9, 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.*