# Axon vs Sleep Tracker

The clearest difference is in-app purchases: Axon at none against Sleep Tracker's 2. Axon also leads on iOS requirement (13.4 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sleep Tracker sells 2 in-app purchases, starting at $4.99 per month. Axon asks for nothing beyond the download.

Axon ships an update every 2 months, Sleep Tracker every 5 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Axon | Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 27 MB | 47 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Creative Techinnov Software Solutions Inc.](https://appshunter.io/developer/1059255111) | [Ramazan Erikli](https://appshunter.io/developer/1789625854) |

## What reviewers say

### Axon

[App page](https://appshunter.io/ios/app/axon/id1537267523)

Assess and track your cognitive function with quick self-assessments. Establish a baseline, monitor changes over time, and receive detailed reports to proactively manage your cognitive health. Designed for ease of use and data security.

**Highlights:** Quick self-assessment (under 2 minutes), Establish cognitive baseline, Automated tracking of changes, Detailed cognitive function reports, Proactive health management, User-friendly interface, Customizable assessments

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-sleep-diary/id6766016682)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleep Tracker Premium (Monthly) | $4.99 | per month |
| Sleep Tracker Premium (Yearly) | $39.99 | per year |


## Frequently asked questions

### Is Axon free?

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

### Is Sleep Tracker free?

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

### Do Axon or Sleep Tracker have ads?

Neither Axon nor Sleep Tracker shows ads.

### Which is updated more often, Axon or Sleep Tracker?

Axon ships an update every 2 months, and Sleep Tracker every 5 weeks. Most recently, Axon was updated on October 24, 2026 and Sleep Tracker on October 13, 2026.

---

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