# Selene vs Cycle Sync

The clearest difference is ads: Selene at none against Cycle Sync's shown. Selene also leads on update cadence (monthly vs every 2 months) and iOS requirement (15.1 vs 18.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Selene sells 1 one-off in-app purchase and Cycle Sync sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Selene ships an update monthly, Cycle Sync every 2 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Selene | Cycle Sync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Size | 41 MB | 78 MB |
| Requires iOS | **15.1** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aiofeffect LLC](https://appshunter.io/developer/1833105894) | [Amit Kairon](https://appshunter.io/developer/1750611800) |

## What reviewers say

### Selene

[App page](https://appshunter.io/ios/app/selene-period-tracker/id6757160714)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Selene Lifetime | $1.99 | one-time |


### Cycle Sync

[App page](https://appshunter.io/ios/app/cycle-sync-smart-menstruation/id6772445948)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CycleSync Pro — Weekly | $4.99 | per 7 days |
| CycleSync Pro | $9.99 | per month |
| CycleSync Pro | $59.99 | per year |


## Frequently asked questions

### Is Selene free?

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

### Is Cycle Sync free?

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

### Do Selene or Cycle Sync have ads?

Cycle Sync shows ads; Selene does not.

### Which is updated more often, Selene or Cycle Sync?

Selene ships an update monthly, and Cycle Sync every 2 months. Most recently, Selene was updated on October 16, 2026 and Cycle Sync on October 24, 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.*