# Boulder Logbook vs SendLog

The clearest difference is update cadence: SendLog at every 3 weeks against Boulder Logbook's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Boulder Logbook ships an update every 7 months, SendLog every 3 weeks. The most recent releases landed on September 17, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Boulder Logbook | SendLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Size | 25 MB | 21 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Martin List](https://appshunter.io/developer/1160761022) | [Robert Ruzitschka](https://appshunter.io/developer/1810539508) |

## What reviewers say

### Boulder Logbook

[App page](https://appshunter.io/ios/app/boulder-logbook/id6444243441)

**Features:** macOS Compatibility

**In-app purchases:** none


### SendLog

[App page](https://appshunter.io/ios/app/sendlog/id6745050437)

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

**In-app purchases:** none


## Frequently asked questions

### Is Boulder Logbook free?

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

### Is SendLog free?

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

### Do Boulder Logbook or SendLog have ads?

Neither Boulder Logbook nor SendLog shows ads.

### Which is updated more often, Boulder Logbook or SendLog?

Boulder Logbook ships an update every 7 months, and SendLog every 3 weeks. Most recently, Boulder Logbook was updated on September 17, 2026 and SendLog on September 29, 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.*