# SmileDiary - Aligner Tracker — Wear Timer & Progress Photos

> Private clear aligner wear timer and progress tracker with photo and data analysis. (iPhone/iPad app by Nanjing Xiaowei Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/smilediary-aligner-tracker/id6753011249 (this page in markdown: same URL + `.md`)
- Developer: [Nanjing Xiaowei Technology Co., Ltd.](https://appshunter.io/developer/1831757763)
- Category: Medical, Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 11 MB
- Languages: Chinese (Simplified, China), American English
- Released: 2026-02-14
- Data updated: 2026-08-24
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/smilediary-aligner-tracker/id6753011249/reviews.md

## What is SmileDiary?

SmileDiary: The Private, No-Nonsense Tracker for Your Aligner Journey

Tired of apps that want your data more than they want to help you? Finally, an app that genuinely respects your privacy and actually gets what it’s like to wear aligners. Created by someone on their own Invisalign journey, SmileDiary is the simple, secure companion your orthodontic investment deserves.

Why SmileDiary Stands Out:
• Truly Private: Your treatment data stays on your device and your own iCloud. We run no servers and never collect or sell your personal information — only anonymous crash reports help us fix bugs.
• No Ads, Ever: A clean, focused experience with zero third-party advertisements.
• No Registration Needed: Start tracking immediately—no email, no account, no commitment.
• You Own Your Data: Full export functionality keeps you in complete control.
• Multiple Treatment Plans: Manage different courses of aligners seamlessly.

Your All-in-One Aligner Companion
• Smart Wear Timer: One-tap tracking for removal time, real-time daily progress, customizable goals, and automatic statistics.
• Visual Calendar: A color-coded view of your compliance, with notes for pain, attachments, or observations.
• Progress Photos: Guided shots for 6 angles, organized by aligner number, with side-by-side comparison and a built-in editor.
• Detailed Insights: Interactive charts show daily, weekly, and monthly trends. Track compliance rate, total days, and longest streaks.

SmileDiary Pro Unlocks More:
• Home & Lock Screen Widgets for at-a-glance progress.
• Full Apple Watch App — track right from your wrist.
• iCloud Sync — seamless flow across all your Apple devices.

Our Promise: Your journey, your data, under your control.
SmileDiary is built on a simple belief: the details of your smile should be for your eyes only. Like a digital diary, it’s designed to serve you—not to serve you ads or mine your habits.

A Note from the Developer:
“As an actual aligner wearer, I couldn’t find a tracker that was both simple and truly private. So I built SmileDiary—the app I use every day. It’s just me behind this, not a big company. If it helps you on your journey too, please consider leaving a review!”

⎯⎯⎯⎯⎯

Privacy Policy: https://smilediary.app/en/app/smilediary/privacy/
Terms of Use: https://smilediary.app/en/app/smilediary/terms/

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SmileDiary Pro Annual | $12.99 | per year |
| SmileDiary Pro Monthly | $2.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| SmileDiary Pro Lifetime | $19.99 | one-time |



## Frequently asked questions about SmileDiary

### Does SmileDiary have ads?

No, SmileDiary is designed to be ad-free, providing a clean and focused experience without any advertisements or disruptive upsells.

### How much does SmileDiary cost?

The basic version of SmileDiary is free to use. For advanced features like home and lock screen widgets, and Apple Watch integration, a subscription to SmileDiary Pro is available.

### What are the SmileDiary Pro subscription options?

SmileDiary Pro offers a monthly subscription for $2.99 with a 7-day free trial, and an annual subscription for $12.99 with a 7-day free trial.

### Is my data safe with SmileDiary?

Yes, SmileDiary prioritizes privacy. Your data stays on your device, and the app does not collect, track, upload, or sell any personal information.

### Can I use SmileDiary without an account?

Absolutely. SmileDiary requires no registration, email, or commitment to start tracking your aligner journey immediately.

### What devices does SmileDiary support?

SmileDiary is available on iPhone and Apple Watch. iCloud Sync allows for seamless use across all your Apple devices with the Pro subscription.

### How often is SmileDiary updated?

The latest version, 1.0.4, was released on May 19, 2026, indicating regular updates to improve functionality and user experience.

### What are the benefits of SmileDiary Pro?

SmileDiary Pro unlocks home and lock screen widgets for at-a-glance progress, a full Apple Watch app for tracking on your wrist, and iCloud Sync for seamless data flow across Apple devices.

## Version history (last 5 releases)

### 1.0.5 — 2026-08-24

• Aligner change and wear-again reminders are now on by default
• Redesigned upgrade page with a clearer 7-day free trial
• Apple Watch upgrade button now works properly
• Bug fixes and improvements

### 1.0.4 — 2026-05-19

Bug fixes and improvements.

### 1.0.3 — 2026-04-01

- Fixed a crash when editing off-time records
- Fixed a crash when adding aligner batch with full inventory

### 1.0.2 — 2026-03-24

• Fixed an issue where calendar data reloaded multiple times when switching months
• Fixed invisible timer shadow in Dark Mode
• Added "Create Treatment Plan" shortcut on empty timer screen
• Improved VoiceOver accessibility for calendar and photo views
• Home screen logo refinement

### 1.0.1 — 2026-03-12

What's New in v1.0.1:

• SmileDiary Pro — Unlock Home & Lock Screen Widgets, Apple Watch App, and iCloud Sync with a Pro subscription.
• Stability improvements and bug fixes for a smoother experience.

## Apps similar to SmileDiary

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [TrayMate](https://appshunter.io/ios/app/traymate/id6771709567) | — | Free | Medical |
| [Align: Clear Aligner Tracker](https://appshunter.io/ios/app/align-clear-aligner-tracker/id6765844379) | 1.0 (1) | Free | Medical |
| [Aligner Wear Timer - Tray](https://appshunter.io/ios/app/aligner-wear-timer-tray/id6765633330) | — | Free | Medical |

## Related topics

[aligner tracker app](https://appshunter.io/ios/topics/aligner-tracker-app)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*