# Retainly vs Aligner Diary

Retainly and Aligner Diary are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Retainly sells 1 one-off in-app purchase and Aligner Diary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Retainly | Aligner Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/retainly-retainer-tracker/id6773165727/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 64 MB | 47 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Glenn Francis](https://appshunter.io/developer/1875693789) | [思佳 李](https://appshunter.io/developer/1835312196) |

## What reviewers say

### Retainly

[App page](https://appshunter.io/ios/app/retainly-retainer-tracker/id6773165727)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | one-time |


### 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 Retainly free?

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

### Is Aligner Diary free?

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

### Do Retainly or Aligner Diary have ads?

Neither Retainly nor Aligner Diary shows ads.

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

Retainly ships an update weekly, and Aligner Diary weekly. Most recently, Retainly was updated on October 24, 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.*