# 美齐日记 vs Aligner Tracker

The clearest difference is in-app purchases: 美齐日记 at none against Aligner Tracker's 4. 美齐日记 also leads on device support (3 vs 1) and iOS requirement (9.0 vs 16.4). Aligner Tracker's advantage is update cadence (every 4 days vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Aligner Tracker sells 4 one-off in-app purchases. 美齐日记 asks for nothing beyond the download.

美齐日记 ships an update every 5 months, Aligner Tracker every 4 days. The most recent releases landed on October 26, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | 美齐日记 | Aligner Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aligner-tracker-alignerdiary/id6811375012/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 74 MB | 42 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [杭州美齐科技有限公司](https://appshunter.io/developer/1340901249) | [智寅 丁](https://appshunter.io/developer/6811367430) |

## What reviewers say

### 美齐日记

[App page](https://appshunter.io/ios/app/id1340901250)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aligner Tracker

[App page](https://appshunter.io/ios/app/aligner-tracker-alignerdiary/id6811375012)

This clear aligner journal helps you track daily wear, tray changes, and appointments. It allows you to log aligner status, store progress photos, and view wear-time charts. Personalize your experience with themes and multiple languages.

**Highlights:** Log aligner in/out times, Track tray changes and appointments, Store and organize progress photos, View wear-time charts, Customizable themes and languages, Manual and iCloud backups

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 曲奇 | $0.99 | one-time |
| 美式 | $1.99 | one-time |
| 拿铁 | $2.99 | one-time |
| SOE | $3.99 | one-time |


## Frequently asked questions

### Is 美齐日记 free?

美齐日记 is free to download, with no in-app purchases.

### Is Aligner Tracker free?

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

### Do 美齐日记 or Aligner Tracker have ads?

Neither 美齐日记 nor Aligner Tracker shows ads.

### Which is updated more often, 美齐日记 or Aligner Tracker?

美齐日记 ships an update every 5 months, and Aligner Tracker every 4 days. Most recently, 美齐日记 was updated on October 26, 2026 and Aligner Tracker on November 1, 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.*