# SmileRetainr vs Aligner Diary

The clearest difference is update cadence: Aligner Diary at weekly against SmileRetainr's every 2 weeks. Aligner Diary also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. SmileRetainr sells 4 in-app purchases, starting at $0.99 per month and Aligner Diary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

SmileRetainr ships an update every 2 weeks, Aligner Diary weekly. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SmileRetainr | Aligner Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smileretainr-retainer-tracker/id6743392986/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Freemium | — |
| Size | 2 MB | 47 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [楚毅 苏](https://appshunter.io/developer/1799476348) | [思佳 李](https://appshunter.io/developer/1835312196) |

## What reviewers say

### SmileRetainr

[App page](https://appshunter.io/ios/app/smileretainr-retainer-tracker/id6743392986)

This app helps retainer wearers track their usage and set daily goals. It provides smart reminders to ensure consistent wear and protect orthodontic results. Maintain your smile with this easy-to-use tracking tool.

**Highlights:** Track retainer wear time, Set daily wear goals, Smart wear reminders, View wear history, Safeguard orthodontic results

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmileRetainr Pro Monthly | $0.99 | per month |
| SmileRetainr Pro Annual | $6.99 | per year |
| SmileRetainr Pro Lifetime | $2.99 | one-time |
| SmileRetainr Pro Lifetime | $9.99 | one-time |


### Aligner Diary

[App page](https://appshunter.io/ios/app/aligner-diary/id6802318433)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Annual | $3.99 | per year |
| Pro Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is SmileRetainr free?

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

### Is Aligner Diary free?

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

### Do SmileRetainr or Aligner Diary have ads?

Neither SmileRetainr nor Aligner Diary shows ads.

### Which is updated more often, SmileRetainr or Aligner Diary?

SmileRetainr ships an update every 2 weeks, and Aligner Diary weekly. Most recently, SmileRetainr was updated on October 20, 2026 and Aligner Diary on October 5, 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.*