# 苏云感控 vs SmileDiary

The clearest difference is in-app purchases: 苏云感控 at none against SmileDiary's 3. 苏云感控 also leads on iOS requirement (15.0 vs 17.0). SmileDiary's advantage is update cadence (every 5 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. SmileDiary sells 3 in-app purchases, starting at $2.99 per month. 苏云感控 asks for nothing beyond the download.

苏云感控 ships an update every 5 weeks, SmileDiary every 5 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 苏云感控 | SmileDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/smilediary-aligner-tracker/id6753011249/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 126 MB | 12 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [湖南德雅曼达科技有限公司](https://appshunter.io/developer/1028960763) | [Nanjing Xiaowei Technology Co., Ltd.](https://appshunter.io/developer/1831757763) |

## What reviewers say

### 苏云感控

[App page](https://appshunter.io/ios/app/id1392311030)

**Features:** Vision Pro support

**In-app purchases:** none


### SmileDiary

[App page](https://appshunter.io/ios/app/smilediary-aligner-tracker/id6753011249)

This app helps you track your clear aligner treatment privately and securely. It offers a smart wear timer, visual calendar, progress photos, and detailed insights into your compliance, all without collecting your personal data.

**Highlights:** Private data storage, No registration required, Smart wear timer, Visual compliance calendar, Guided progress photos, Detailed treatment insights, Data export functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmileDiary Pro Monthly | $2.99 | per month |
| SmileDiary Pro Annual | $12.99 | per year |
| SmileDiary Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is 苏云感控 free?

苏云感控 is free to download, with no in-app purchases.

### Is SmileDiary free?

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

### Do 苏云感控 or SmileDiary have ads?

Neither 苏云感控 nor SmileDiary shows ads.

### Which is updated more often, 苏云感控 or SmileDiary?

苏云感控 ships an update every 5 weeks, and SmileDiary every 5 days. Most recently, 苏云感控 was updated on November 2, 2026 and SmileDiary on October 30, 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.*