# Cycle Sync vs Vellum

The clearest difference is in-app purchases: Vellum at none against Cycle Sync's 3. Vellum also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Cycle Sync sells 3 in-app purchases, starting at $4.99 per 7 days. Vellum asks for nothing beyond the download.

Cycle Sync ships an update every 2 months, Vellum every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Cycle Sync | Vellum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 78 MB | 46 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Amit Kairon](https://appshunter.io/developer/1750611800) | [youssef fakih](https://appshunter.io/developer/6784882063) |

## What reviewers say

### 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 |


### Vellum

[App page](https://appshunter.io/ios/app/vellum-period-tracker/id6790039242)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cycle Sync free?

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

### Is Vellum free?

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

### Do Cycle Sync or Vellum have ads?

Cycle Sync shows ads; Vellum does not.

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

Cycle Sync ships an update every 2 months, and Vellum every 3 weeks. Most recently, Cycle Sync was updated on October 31, 2026 and Vellum 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.*