# ClusterUck vs Achy

The clearest difference is in-app purchases: ClusterUck at none against Achy's 6. Achy's advantage is review sentiment (100% vs 85%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Achy sells 6 in-app purchases, starting at $4.99 per year. ClusterUck asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for ClusterUck against 4.9 for Achy. Both are backed by a comparable volume of ratings — 38 and 18 respectively. Written reviews are what separate them: 85% of ClusterUck's written reviews are positive against 100% of Achy's.

ClusterUck ships an update every 3 months, Achy every 5 months. Both last shipped on September 9, 2026.

## The numbers

| Metric | ClusterUck | Achy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (38 ratings)](https://appshunter.io/ios/app/clusteruck/id1072769448/reviews) | **[4.9 (18 ratings)](https://appshunter.io/ios/app/achy-headache-tracker/id6550894097/reviews)** |
| Number of ratings | **38** | 18 |
| Positive reviews | 84.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | **Free** | Freemium |
| Size | 6 MB | 69 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [S.J.M. Kolff](https://appshunter.io/developer/882594477) | [Atom Spark Software, LLC.](https://appshunter.io/developer/1757755518) |

## What reviewers say

### ClusterUck

[App page](https://appshunter.io/ios/app/clusteruck/id1072769448)

This app provides a comprehensive tool for individuals experiencing recurring headaches to log and monitor their episodes in detail. It allows for tracking duration, pain location, triggers, symptoms, medications, and even weather data. Gain insights into your headache patterns through clear data analysis and easily share reports with healthcare providers.

**Highlights:** Detailed headache episode logging, Track duration, pain location, triggers, Record symptoms and medications, Monitor weather data for insights, Analyze headache patterns with graphs, Export reports in PDF/CSV format

**In-app purchases:** none


### Achy

[App page](https://appshunter.io/ios/app/achy-headache-tracker/id6550894097)

Easily track headache occurrences, symptoms, and potential triggers. Visualize your data with charts and graphs, and generate PDF reports for your healthcare provider. Customize the app to suit your needs and maintain a detailed headache log.

**Highlights:** Headache tracking and logging, Customizable variables, Data visualization with charts, PDF report generation, Calendar view, Data import and export

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wellness Warrior | $4.99 | per year |
| Migraine Maverick | $9.99 | per year |
| Headache Hero | $19.99 | per year |
| Relief Supporter | $0.99 | one-time |
| Comfort Contributor | $2.99 | one-time |
| Pain Relief Partner | $4.99 | one-time |


## Frequently asked questions

### Is ClusterUck free?

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

### Is Achy free?

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

### Which has better reviews, ClusterUck or Achy?

Achy is rated higher. ClusterUck averages 4.8 out of 5 from 38 ratings, while Achy averages 4.9 from 18 ratings.

### Do ClusterUck or Achy have ads?

Neither ClusterUck nor Achy shows ads.

### Which is updated more often, ClusterUck or Achy?

ClusterUck ships an update every 3 months, and Achy every 5 months. Most recently, ClusterUck was updated on September 9, 2026 and Achy on September 9, 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.*