# SmileDiary vs TrayMate

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

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

SmileDiary ships an update every 5 days, TrayMate daily. The most recent releases landed on September 22, 2026 and May 30, 2026 respectively.

## The numbers

| Metric | SmileDiary | TrayMate |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Freemium | — |
| Size | 12 MB | 5 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Nanjing Xiaowei Technology Co., Ltd.](https://appshunter.io/developer/1831757763) | [梓轩 吴](https://appshunter.io/developer/1864791707) |

## What reviewers say

### 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 | $19.99 | one-time |


### TrayMate

[App page](https://appshunter.io/ios/app/traymate/id6771709567)

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

**In-app purchases:** none


## Frequently asked questions

### Is SmileDiary free?

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

### Is TrayMate free?

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

### Do SmileDiary or TrayMate have ads?

Neither SmileDiary nor TrayMate shows ads.

### Which is updated more often, SmileDiary or TrayMate?

SmileDiary ships an update every 5 days, and TrayMate daily. Most recently, SmileDiary was updated on September 22, 2026 and TrayMate on May 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.*