# ClusterUck vs PainGo

The clearest difference is review sentiment: ClusterUck at 85% against PainGo's 0%. ClusterUck also leads on in-app purchases (none vs 2) and ratings volume (38 vs 4). PainGo's advantage is update cadence (every 4 weeks vs every 3 months) and rating (5.0 vs 4.8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PainGo sells 2 in-app purchases, starting at $2.99 per month. ClusterUck asks for nothing beyond the download.

PainGo holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ClusterUck has 38 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 85% of ClusterUck's written reviews are positive against 0% of PainGo's, so the app with the better star average is not the one people write more warmly about.

ClusterUck ships an update every 3 months, PainGo every 4 weeks. The most recent releases landed on September 9, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | ClusterUck | PainGo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (38 ratings)](https://appshunter.io/ios/app/clusteruck/id1072769448/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/paingo-headache-diary/id6449453103/reviews)** |
| Number of ratings | **38** | 4 |
| Positive reviews | **84.6% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 7 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 9+ | 12+ |
| Developer | [S.J.M. Kolff](https://appshunter.io/developer/882594477) | [华 水](https://appshunter.io/developer/1727864058) |

## 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


### PainGo

[App page](https://appshunter.io/ios/app/paingo-headache-diary/id6449453103)

This app helps you track and understand your headaches by logging details like timing, duration, severity, triggers, and symptoms. It provides statistical analysis to identify patterns and empowers you to share comprehensive data with your doctor for better diagnosis and treatment.

**Highlights:** Log headache timing, duration, and severity, Record triggers, symptoms, and medications, Analyze headache patterns and frequency, Evaluate medication effectiveness, Share data with healthcare providers, Identify personal triggers and warning signs

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $2.99 | per month |
| 12 Months | $19.99 | per year |


## Frequently asked questions

### Is ClusterUck free?

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

### Is PainGo free?

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

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

PainGo is rated higher. ClusterUck averages 4.8 out of 5 from 38 ratings, while PainGo averages 5.0 from 4 ratings.

### Do ClusterUck or PainGo have ads?

Neither ClusterUck nor PainGo shows ads.

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

ClusterUck ships an update every 3 months, and PainGo every 4 weeks. Most recently, ClusterUck was updated on September 9, 2026 and PainGo on July 23, 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.*