# APS Physiology vs SpAR Lab

APS Physiology and SpAR Lab are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

APS Physiology ships an update fortnightly, SpAR Lab every 3 weeks. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | APS Physiology | SpAR Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 87 MB | 137 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [American Physiological Society](https://appshunter.io/developer/1674934435) | [K20 Center - University of Oklahoma](https://appshunter.io/developer/676209138) |

## 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


### SpAR Lab

[App page](https://appshunter.io/ios/app/spar-lab/id6777226868)

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

**In-app purchases:** none


## Frequently asked questions

### Is APS Physiology free?

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

### Is SpAR Lab free?

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

### Do APS Physiology or SpAR Lab have ads?

Neither APS Physiology nor SpAR Lab shows ads.

### Which is updated more often, APS Physiology or SpAR Lab?

APS Physiology ships an update fortnightly, and SpAR Lab every 3 weeks. Most recently, APS Physiology was updated on November 5, 2026 and SpAR Lab on October 28, 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.*