# s.a.d.e vs Ailyn

The clearest difference is in-app purchases: Ailyn at none against s.a.d.e's 2. Ailyn also leads on update cadence (every 2 days vs every 5 days). s.a.d.e's advantage is iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. s.a.d.e sells 2 in-app purchases, starting at $4.99 per month. Ailyn asks for nothing beyond the download.

s.a.d.e ships an update every 5 days, Ailyn every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | s.a.d.e | Ailyn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 37 MB | 22 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [ERDINC SARI](https://appshunter.io/developer/1855628338) | [Ankita Satpathy](https://appshunter.io/developer/1896614132) |

## What reviewers say

### s.a.d.e

[App page](https://appshunter.io/ios/app/sade-period-tracker/id6760249797)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Annual Premium | $49.99 | per year |


### Ailyn

[App page](https://appshunter.io/ios/app/ailyn-cycle-syncing/id6800214297)

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

**In-app purchases:** none


## Frequently asked questions

### Is s.a.d.e free?

s.a.d.e is free to download, with in-app purchases available.

### Is Ailyn free?

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

### Do s.a.d.e or Ailyn have ads?

Neither s.a.d.e nor Ailyn shows ads.

### Which is updated more often, s.a.d.e or Ailyn?

s.a.d.e ships an update every 5 days, and Ailyn every 2 days. Most recently, s.a.d.e was updated on October 31, 2026 and Ailyn on October 31, 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.*