# Time Logger for Clinical Study vs Chartrix

The clearest difference is update cadence: Chartrix at every 5 days against Time Logger for Clinical Study's every 6 weeks. Time Logger for Clinical Study's advantage is iOS requirement (8.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Time Logger for Clinical Study ships an update every 6 weeks, Chartrix every 5 days. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Time Logger for Clinical Study | Chartrix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/time-logger-for-clinical-study/id1181993402/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 15 MB | 19 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 12+ | 17+ |
| Developer | [Align Technology, Inc.](https://appshunter.io/developer/1023135384) | [CodersHigh](https://appshunter.io/developer/1881449719) |

## What reviewers say

### Time Logger for Clinical Study

[App page](https://appshunter.io/ios/app/time-logger-for-clinical-study/id1181993402)

This app helps track aligner wear time for participants in clinical studies. It provides a simple way to log usage for research purposes.

**Highlights:** Track aligner wear time, Clinical study support, Log usage data

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

**In-app purchases:** none


### Chartrix

[App page](https://appshunter.io/ios/app/chartrix/id6761618126)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Time Logger for Clinical Study free?

Time Logger for Clinical Study is free to download, with no in-app purchases.

### Is Chartrix free?

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

### Do Time Logger for Clinical Study or Chartrix have ads?

Neither Time Logger for Clinical Study nor Chartrix shows ads.

### Which is updated more often, Time Logger for Clinical Study or Chartrix?

Time Logger for Clinical Study ships an update every 6 weeks, and Chartrix every 5 days. Most recently, Time Logger for Clinical Study was updated on October 9, 2026 and Chartrix on October 4, 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.*