# KireiCycle vs Cycle Sync

The clearest difference is update cadence: KireiCycle at every 4 days against Cycle Sync's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KireiCycle sells 2 in-app purchases, starting at $0.99 per 7 days 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.

KireiCycle ships an update every 4 days, Cycle Sync fortnightly. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | KireiCycle | Cycle Sync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 19 MB | 55 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Starcrown Inc](https://appshunter.io/developer/1082624152) | [Amit Kairon](https://appshunter.io/developer/1750611800) |

## What reviewers say

### KireiCycle

[App page](https://appshunter.io/ios/app/kireicycle/id6762587066)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kireicycle Pro 週額 | $0.99 | per 7 days |
| Kireicycle Pro 年額 | $17.99 | per year |


### 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 KireiCycle free?

KireiCycle 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 KireiCycle or Cycle Sync have ads?

Neither KireiCycle nor Cycle Sync shows ads.

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

KireiCycle ships an update every 4 days, and Cycle Sync fortnightly. Most recently, KireiCycle was updated on October 2, 2026 and Cycle Sync on September 29, 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.*