# ZoeFlow vs CalTracKs

The clearest difference is in-app purchases: CalTracKs at none against ZoeFlow's 2. ZoeFlow's advantage is update cadence (every 8 days vs monthly) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ZoeFlow sells 2 in-app purchases, starting at $1.99 per month. CalTracKs asks for nothing beyond the download.

ZoeFlow ships an update every 8 days, CalTracKs monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | ZoeFlow | CalTracKs |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Monthly |
| Size | 124 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [BLOOM IT TECH](https://appshunter.io/developer/1887770888) | [SAHAJ SOTI](https://appshunter.io/developer/1879918368) |

## What reviewers say

### ZoeFlow

[App page](https://appshunter.io/ios/app/zoeflow-period-tracker/id6761095101)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $12.99 | per year |


### CalTracKs

[App page](https://appshunter.io/ios/app/caltracks/id6761637079)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZoeFlow free?

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

### Is CalTracKs free?

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

### Do ZoeFlow or CalTracKs have ads?

Neither ZoeFlow nor CalTracKs shows ads.

### Which is updated more often, ZoeFlow or CalTracKs?

ZoeFlow ships an update every 8 days, and CalTracKs monthly. Most recently, ZoeFlow was updated on November 5, 2026 and CalTracKs on November 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.*