# APS Physiology vs LabProtocol

The clearest difference is in-app purchases: APS Physiology at none against LabProtocol's 1. APS Physiology also leads on device support. On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. LabProtocol sells 1 in-app purchase, starting at $2.99 per month. APS Physiology asks for nothing beyond the download.

APS Physiology ships an update every 2 weeks, LabProtocol every 11 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | APS Physiology | LabProtocol |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 2 weeks | **Every 11 days** |
| Size | 87 MB | 34 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 17+ | 4+ |
| Developer | [American Physiological Society](https://appshunter.io/developer/1674934435) | [TOMAS SAROUN](https://appshunter.io/developer/1889510357) |

## What reviewers say

### APS Physiology

[App page](https://appshunter.io/ios/app/aps-physiology/id6759407893)

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

**In-app purchases:** none


### LabProtocol

[App page](https://appshunter.io/ios/app/labprotocol/id6761419953)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LabProtocol Pro | $2.99 | per month |


## Frequently asked questions

### Is APS Physiology free?

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

### Is LabProtocol free?

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

### Which is updated more often, APS Physiology or LabProtocol?

APS Physiology ships an update every 2 weeks, and LabProtocol every 11 days. Most recently, APS Physiology was updated on October 1, 2026 and LabProtocol on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*