# SmileTrack‐Invisalign&Aligner vs Simple Aligner Timer

The clearest difference is in-app purchases: Simple Aligner Timer at none against SmileTrack‐Invisalign&Aligner's 5. Simple Aligner Timer also leads on ads (none vs shown) and update cadence (every 9 days vs monthly). SmileTrack‐Invisalign&Aligner's advantage is iOS requirement (15.0 vs 17.2). On price and device support there is nothing between them.

Both are free to download. SmileTrack‐Invisalign&Aligner sells 5 in-app purchases, starting at $3.00 per month. Simple Aligner Timer asks for nothing beyond the download.

SmileTrack‐Invisalign&Aligner ships an update monthly, Simple Aligner Timer every 9 days. The most recent releases landed on September 18, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SmileTrack‐Invisalign&Aligner | Simple Aligner Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 9 days** |
| Size | 22 MB | 4 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mayu Nishimoto](https://appshunter.io/developer/1888340676) | [YUNOSUKE TAKAHASHI](https://appshunter.io/developer/1895262960) |

## What reviewers say

### SmileTrack‐Invisalign&Aligner

[App page](https://appshunter.io/ios/app/smiletrackinvisalign-and-aligner/id6761232027)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン 月額 | $3.00 | per month |
| プレミアムプラン 年額 | $30.00 | per year |
| コーヒーを送る | $1.00 | one-time |
| 広告を削除 | $1.00 | one-time |
| プレミアムプラン 買い切り | $60.00 | one-time |


### Simple Aligner Timer

[App page](https://appshunter.io/ios/app/simple-aligner-timer/id6763320886)

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

**In-app purchases:** none


## Frequently asked questions

### Is SmileTrack‐Invisalign&Aligner free?

SmileTrack‐Invisalign&Aligner is free to download, with in-app purchases available.

### Is Simple Aligner Timer free?

Simple Aligner Timer is free to download, with no in-app purchases.

### Do SmileTrack‐Invisalign&Aligner or Simple Aligner Timer have ads?

SmileTrack‐Invisalign&Aligner shows ads; Simple Aligner Timer does not.

### Which is updated more often, SmileTrack‐Invisalign&Aligner or Simple Aligner Timer?

SmileTrack‐Invisalign&Aligner ships an update monthly, and Simple Aligner Timer every 9 days. Most recently, SmileTrack‐Invisalign&Aligner was updated on September 18, 2026 and Simple Aligner Timer on September 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*