# Headache Diary Pro vs Küng Sauna

The clearest difference is price: Küng Sauna at Free against Headache Diary Pro's $3.99. Küng Sauna also leads on iOS requirement (13.0 vs 15.6). Headache Diary Pro's advantage is update cadence (every 3 months vs every 22 months). On ads, in-app purchases and device support there is nothing between them.

Küng Sauna is free to download; Headache Diary Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Headache Diary Pro ships an update every 3 months, Küng Sauna every 22 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Headache Diary Pro | Küng Sauna |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.5 (19 ratings)](https://appshunter.io/ios/app/headache-diary-pro/id402258244/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | Paid | — |
| Size | 9 MB | 15 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Tim Preuss](https://appshunter.io/developer/1023232972) | [IQONICS GmbH](https://appshunter.io/developer/1592265467) |

## What reviewers say

### Headache Diary Pro

[App page](https://appshunter.io/ios/app/headache-diary-pro/id402258244)

Track your headache pain, symptoms, and potential triggers with this comprehensive mobile diary. Analyze your headache patterns with detailed statistics and export your findings for further review. Helps you gain control over your pain by understanding its characteristics.

**Highlights:** Extensive headache logging, Track pain, symptoms, and triggers, Record medication and effectiveness, Multi-user support, Comprehensive offline statistics, PDF export function

**In-app purchases:** none


### Küng Sauna

[App page](https://appshunter.io/ios/app/kung-sauna/id1597119297)

**In-app purchases:** none


## Frequently asked questions

### Is Headache Diary Pro free?

Headache Diary Pro costs $3.99, with no in-app purchases.

### Is Küng Sauna free?

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

### Do Headache Diary Pro or Küng Sauna have ads?

Neither Headache Diary Pro nor Küng Sauna shows ads.

### Which is updated more often, Headache Diary Pro or Küng Sauna?

Headache Diary Pro ships an update every 3 months, and Küng Sauna every 22 months. Most recently, Headache Diary Pro was updated on November 1, 2026 and Küng Sauna on October 27, 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.*