# REZET vs Chronic Trace

The clearest difference is in-app purchases: REZET at none against Chronic Trace's 2. Chronic Trace's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Chronic Trace sells 2 in-app purchases, starting at $14.99 per month. REZET asks for nothing beyond the download.

REZET ships an update every 6 days, Chronic Trace every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | REZET | Chronic Trace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chronic-trace/id6772760810/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | — | Subscription |
| Size | 35 MB | 64 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MARTIN TESAR](https://appshunter.io/developer/1867994856) | [Chronic Trace, Inc.](https://appshunter.io/developer/6772760812) |

## What reviewers say

### REZET

[App page](https://appshunter.io/ios/app/rezet-nervous-system-toolkit/id6759931581)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chronic Trace

[App page](https://appshunter.io/ios/app/chronic-trace/id6772760810)

This app uses your phone's camera to measure involuntary signals like eye movement, balance, focus, and reaction time. It creates a personal wellness index scored against your baseline to track subtle changes over time without extra hardware.

**Highlights:** Camera-based wellness checks, Measures eye movement, balance, focus, reaction, Personalized baseline scoring, Tracks subtle changes over time, No extra hardware required, Anonymized tracking option

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chronic Trace Monthly | $14.99 | per month |
| Chronic Trace Yearly | $149.99 | per year |


## Frequently asked questions

### Is REZET free?

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

### Is Chronic Trace free?

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

### Do REZET or Chronic Trace have ads?

REZET shows ads; Chronic Trace does not.

### Which is updated more often, REZET or Chronic Trace?

REZET ships an update every 6 days, and Chronic Trace every 3 days. Most recently, REZET was updated on October 31, 2026 and Chronic Trace on October 31, 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.*