# ShireSystem Mobile Pro vs Activity Study

The clearest difference is update cadence: Activity Study at every 6 weeks against ShireSystem Mobile Pro's every 4 months. ShireSystem Mobile Pro's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 15.1). On price, ads and in-app purchases there is nothing between them.

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

ShireSystem Mobile Pro ships an update every 4 months, Activity Study every 6 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ShireSystem Mobile Pro | Activity Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 72 MB | 31 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shire Systems Limited](https://appshunter.io/developer/1473791507) | [ReTime](https://appshunter.io/developer/1680752278) |

## What reviewers say

### ShireSystem Mobile Pro

[App page](https://appshunter.io/ios/app/shiresystem-mobile-pro/id1473791508)

**Features:** macOS Compatibility

**In-app purchases:** none


### Activity Study

[App page](https://appshunter.io/ios/app/activity-study/id6463711406)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ShireSystem Mobile Pro free?

ShireSystem Mobile Pro is free to download, with no in-app purchases.

### Is Activity Study free?

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

### Do ShireSystem Mobile Pro or Activity Study have ads?

Neither ShireSystem Mobile Pro nor Activity Study shows ads.

### Which is updated more often, ShireSystem Mobile Pro or Activity Study?

ShireSystem Mobile Pro ships an update every 4 months, and Activity Study every 6 weeks. Most recently, ShireSystem Mobile Pro was updated on October 26, 2026 and Activity Study on October 27, 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.*