# My Invisalign vs SmileDiary

The clearest difference is in-app purchases: My Invisalign at none against SmileDiary's 3. My Invisalign also leads on chart position (#54 vs unranked). SmileDiary's advantage is update cadence (every 5 days vs monthly). On price, ads, monetization model 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. My Invisalign asks for nothing beyond the download.

My Invisalign ships an update monthly, SmileDiary every 5 days. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | My Invisalign | SmileDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (63K ratings)](https://appshunter.io/ios/app/my-invisalign/id1325633853/reviews)** | — |
| Number of ratings | **63K** | — |
| Positive reviews | 26.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | **#54** | — |
| Size | 305 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Align Technology, Inc.](https://appshunter.io/developer/1023135384) | [Nanjing Xiaowei Technology Co., Ltd.](https://appshunter.io/developer/1831757763) |

## What reviewers say

### My Invisalign

[App page](https://appshunter.io/ios/app/my-invisalign/id1325633853)

**Currently charting:** #54 Top Free · Medical (US App Store)

This app supports individuals interested in or currently undergoing clear aligner treatment. It offers tools to estimate insurance coverage, simulate smile transformations, find orthodontists, and track aligner wear. Patients can also connect with their doctors for virtual care and view treatment plans.

**Highlights:** Insurance coverage estimation, Smile simulation tool, Find a doctor, Aligner wear tracking, Virtual care with doctor, Treatment plan viewing

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

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient timer feature
- 📸 Helpful progress photo tracking
- 💡 Ability to set aligner change reminders
- 🚀 Intuitive and user-friendly interface

**What reviewers complain about**

- 🐛 Timer functionality issues
- 🔍 Lack of customization options
- 🤔 Confusing aligner tracking
- 💤 Unreliable notification system
- 🔄 Inconsistent data sync across devices

**Reported bugs**

- Account login and registration problems
- Inconsistent calendar and aligner tracking
- Crashing and freezing issues after updates
- Inability to manually adjust aligner schedules

**Requested features**

- Allow editing of timer logs on the same day
- Provide option to track time aligners are out vs in
- Integrate with Apple Watch for better accessibility
- Improve photo upload and comparison capabilities
- Enable better communication with orthodontist


### 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 My Invisalign free?

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

### Is SmileDiary free?

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

### Do My Invisalign or SmileDiary have ads?

Neither My Invisalign nor SmileDiary shows ads.

### Which is updated more often, My Invisalign or SmileDiary?

My Invisalign ships an update monthly, and SmileDiary every 5 days. Most recently, My Invisalign was updated on October 16, 2026 and SmileDiary 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.*