# Boulder Pass vs サウナログ

The clearest difference is in-app purchases: Boulder Pass at none against サウナログ's 1. Boulder Pass also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.0). サウナログ's advantage is update cadence (every 8 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. サウナログ sells 1 in-app purchase, starting at $1.99 per month. Boulder Pass asks for nothing beyond the download.

Boulder Pass ships an update every 3 weeks, サウナログ every 8 days. The most recent releases landed on September 14, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Boulder Pass | サウナログ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 20 MB | 65 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Williams Kwan](https://appshunter.io/developer/1658651535) | [Yugo Matsuda](https://appshunter.io/developer/1517181379) |

## What reviewers say

### Boulder Pass

[App page](https://appshunter.io/ios/app/boulder-pass/id1658651533)

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

**In-app purchases:** none


### サウナログ

[App page](https://appshunter.io/ios/app/id6446017315)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SaunaLog Premium | $1.99 | per month |


## Frequently asked questions

### Is Boulder Pass free?

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

### Is サウナログ free?

サウナログ is free to download, with in-app purchases available.

### Do Boulder Pass or サウナログ have ads?

サウナログ shows ads; Boulder Pass does not.

### Which is updated more often, Boulder Pass or サウナログ?

Boulder Pass ships an update every 3 weeks, and サウナログ every 8 days. Most recently, Boulder Pass was updated on September 14, 2026 and サウナログ on September 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*