# RetinTrack A vs 肠道森林

The clearest difference is in-app purchases: 肠道森林 at none against RetinTrack A's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RetinTrack A sells 2 in-app purchases, starting at $0.99 per month. 肠道森林 asks for nothing beyond the download.

RetinTrack A ships an update fortnightly, 肠道森林 every 10 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RetinTrack A | 肠道森林 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/retintrack-a/id6804353678/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Freemium | — |
| Size | 1 MB | 22 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [瞳灵 胡](https://appshunter.io/developer/6799178471) | [苍昊 姚](https://appshunter.io/developer/6780296010) |

## What reviewers say

### RetinTrack A

[App page](https://appshunter.io/ios/app/retintrack-a/id6804353678)

This app helps you manage your retinol skincare routine with a smart 90-day calendar. It provides personalized recommendations based on your skin type and experience, with automated reminders and Apple Calendar sync. Track your progress and adjust your schedule as your skin adapts.

**Highlights:** Personalized 90-day skincare calendar, Smart automated reminders, Customizable concentration and frequency, Apple Calendar sync, Progress tracking, Skin type and experience algorithm

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A+C | $0.99 | per month |
| A+C International | $8.99 | per year |


### 肠道森林

[App page](https://appshunter.io/ios/app/id6812831084)

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

**In-app purchases:** none


## Frequently asked questions

### Is RetinTrack A free?

RetinTrack A is free to download, with in-app purchases available.

### Is 肠道森林 free?

肠道森林 is free to download, with no in-app purchases.

### Do RetinTrack A or 肠道森林 have ads?

Neither RetinTrack A nor 肠道森林 shows ads.

### Which is updated more often, RetinTrack A or 肠道森林?

RetinTrack A ships an update fortnightly, and 肠道森林 every 10 days. Most recently, RetinTrack A was updated on November 6, 2026 and 肠道森林 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.*