# CU Trails vs Eczema Tracker゜

The clearest difference is in-app purchases: CU Trails at none against Eczema Tracker゜'s 14. CU Trails also leads on iOS requirement (9.0 vs 15.5). Eczema Tracker゜'s advantage is device support (4 vs 2). On price, update cadence and ads there is nothing between them.

Both are free to download. Eczema Tracker゜ sells 14 in-app purchases, starting at $4.95 per month. CU Trails asks for nothing beyond the download.

CU Trails ships an update every 9 months, Eczema Tracker゜ every 7 months. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CU Trails | Eczema Tracker゜ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 7 months** |
| Size | 51 MB | 217 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [The Chinese University of Hong Kong](https://appshunter.io/developer/369070876) | [Digital Therapeutics](https://appshunter.io/developer/1721663167) |

## What reviewers say

### CU Trails

[App page](https://appshunter.io/ios/app/cu-trails/id1332938584)

**In-app purchases:** none


### Eczema Tracker゜

[App page](https://appshunter.io/ios/app/eczema-tracker/id6745561801)

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| flex pass | $4.95 | per month |
| easy pass | $7.99 | per 7 days |
| weather max | $9.99 | per 3 months |
| flex pass | $18.99 | per month |
| carey ai max | $19.99 | per month |
| smart pass | $19.99 | per year |
| yearly access | $19.99 | per year |
| carey ai ultra | $29.99 | per month |
| Premium Yearly | $34.99 | per year |
| yearly access | $39.99 | per year |
| Extended Trial | $39.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $1.99 | one-time |
| carey ai credits | $8.99 | one-time |


## Frequently asked questions

### Is CU Trails free?

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

### Is Eczema Tracker゜ free?

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

### Do CU Trails or Eczema Tracker゜ have ads?

Neither CU Trails nor Eczema Tracker゜ shows ads.

### Which is updated more often, CU Trails or Eczema Tracker゜?

CU Trails ships an update every 9 months, and Eczema Tracker゜ every 7 months. Most recently, CU Trails was updated on October 7, 2026 and Eczema Tracker゜ on October 8, 2026.

---

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