# Dental Stack vs 22 Hours

The clearest difference is rating: 22 Hours at 3.7 against Dental Stack's 1.0. 22 Hours also leads on device support (3 vs 1) and ratings volume (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

22 Hours holds the better App Store score, 3.7 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Dental Stack ships an update every 4 weeks, 22 Hours every 6 weeks. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Dental Stack | 22 Hours |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/dental-stack/id6451335341/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/22-hours-aligner-tracker/id6764899476/reviews)** |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 72 MB | 12 MB |
| Requires iOS | **16.1** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [DentalStack](https://appshunter.io/developer/1697611393) | [Gazewing LLC](https://appshunter.io/developer/1895955102) |

## What reviewers say

### Dental Stack

[App page](https://appshunter.io/ios/app/dental-stack/id6451335341)

This app helps users track their clear aligner treatment, ensuring they meet daily wear time goals and remember to change aligners on schedule. It allows for progress photo capture and secure sharing with doctors, providing insights and keeping users motivated throughout their orthodontic journey.

**Highlights:** Track daily aligner wear time, Reminders for aligner changes, Capture and share progress photos, Connect and communicate with doctor, View treatment timeline and milestones, Detailed aligner usage insights

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

**In-app purchases:** none


### 22 Hours

[App page](https://appshunter.io/ios/app/22-hours-aligner-tracker/id6764899476)

This app helps users track their clear aligner wear time accurately. It provides simple one-tap logging for aligner insertion and removal, offering insights into daily progress, streaks, and treatment history. The app also includes helpful reminders and progress photo capabilities.

**Highlights:** One-tap aligner wear logging, Daily out-time budget visualization, Streak tracking for goal achievement, Detailed stats and treatment history, Customizable reminders for aligner changes, Progress photo capture and management, Siri integration for hands-free logging

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

**In-app purchases:** none


## Frequently asked questions

### Is Dental Stack free?

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

### Is 22 Hours free?

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

### Which has better reviews, Dental Stack or 22 Hours?

22 Hours is rated higher. Dental Stack averages 1.0 out of 5 from 1 ratings, while 22 Hours averages 3.7 from 3 ratings.

### Do Dental Stack or 22 Hours have ads?

Neither Dental Stack nor 22 Hours shows ads.

### Which is updated more often, Dental Stack or 22 Hours?

Dental Stack ships an update every 4 weeks, and 22 Hours every 6 weeks. Most recently, Dental Stack was updated on September 17, 2026 and 22 Hours on September 23, 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.*