# FitLab Test vs iDIERS

The clearest difference is in-app purchases: FitLab Test at none against iDIERS's 3. iDIERS's advantage is update cadence (every 2 months vs every 90 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. iDIERS sells 3 in-app purchases, starting at $27.49 per month. FitLab Test asks for nothing beyond the download.

FitLab Test ships an update every 90 months, iDIERS every 2 months. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | FitLab Test | iDIERS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 90 months | **Every 2 months** |
| Size | 10 MB | 201 MB |
| Requires iOS | 11.0 | 11 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Health&SportLab](https://appshunter.io/developer/893973549) | [iDIERS GmbH](https://appshunter.io/developer/1483716096) |

## What reviewers say

### FitLab Test

[App page](https://appshunter.io/ios/app/fitlab-test/id1101639148)

**Features:** macOS Compatibility

**In-app purchases:** none


### iDIERS

[App page](https://appshunter.io/ios/app/idiers/id1483717889)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iDIERS Pro 1 Month | $27.49 | per month |
| iDIERS Pro 1 Month | $26.99 | one-time |
| iDIERS Pro 3 Months | $79.99 | one-time |


## Frequently asked questions

### Is FitLab Test free?

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

### Is iDIERS free?

iDIERS is free to download, with in-app purchases available.

### Do FitLab Test or iDIERS have ads?

Neither FitLab Test nor iDIERS shows ads.

### Which is updated more often, FitLab Test or iDIERS?

FitLab Test ships an update every 90 months, and iDIERS every 2 months. Most recently, FitLab Test was updated on October 10, 2026 and iDIERS 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.*