# Biostress vs Proper Reps

The clearest difference is in-app purchases: Biostress at none against Proper Reps's 3. Proper Reps's advantage is update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Proper Reps sells 3 in-app purchases, starting at $9.99 per month. Biostress asks for nothing beyond the download.

Biostress ships an update monthly, Proper Reps every 10 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Biostress | Proper Reps |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 41 MB | 113 MB |
| Requires iOS | **13.4** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Biostress Lab Ltd](https://appshunter.io/developer/1762589825) | [GigaFit LTD](https://appshunter.io/developer/1721273991) |

## What reviewers say

### Biostress

[App page](https://appshunter.io/ios/app/biostress/id6444656152)

**Features:** macOS Compatibility

**In-app purchases:** none


### Proper Reps

[App page](https://appshunter.io/ios/app/proper-reps/id6451119987)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Experience | $9.99 | per month |
| 3 Month Experience | $19.99 | per 3 months |
| 1 Year Experience | $69.99 | per year |


## Frequently asked questions

### Is Biostress free?

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

### Is Proper Reps free?

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

### Do Biostress or Proper Reps have ads?

Neither Biostress nor Proper Reps shows ads.

### Which is updated more often, Biostress or Proper Reps?

Biostress ships an update monthly, and Proper Reps every 10 days. Most recently, Biostress was updated on October 19, 2026 and Proper Reps on October 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.*