# Aqua Aligner vs Aligner Diary

The clearest difference is in-app purchases: Aqua Aligner at none against Aligner Diary's 3. Aligner Diary's advantage is update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Aligner Diary sells 3 in-app purchases, starting at $0.99 per month. Aqua Aligner asks for nothing beyond the download.

Aqua Aligner ships an update monthly, Aligner Diary weekly. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Aqua Aligner | Aligner Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 87 MB | 47 MB |
| Requires iOS | 15.4 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Smile Genius Limited](https://appshunter.io/developer/1571960051) | [思佳 李](https://appshunter.io/developer/1835312196) |

## What reviewers say

### Aqua Aligner

[App page](https://appshunter.io/ios/app/aqua-aligner/id6502831029)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### 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 Aqua Aligner free?

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

### Is Aligner Diary free?

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

### Do Aqua Aligner or Aligner Diary have ads?

Neither Aqua Aligner nor Aligner Diary shows ads.

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

Aqua Aligner ships an update monthly, and Aligner Diary weekly. Most recently, Aqua Aligner was updated on October 1, 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.*