# DOFs Fuglebog vs Rationel

The clearest difference is update cadence: Rationel at every 6 weeks against DOFs Fuglebog's every 6 months. Rationel also leads on iOS requirement (12.0 vs 14.0). 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.

DOFs Fuglebog ships an update every 6 months, Rationel every 6 weeks. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DOFs Fuglebog | Rationel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Size | 8 MB | 158 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dansk Ornitologisk Forening](https://appshunter.io/developer/1170528882) | [Rationel Vinduer](https://appshunter.io/developer/916699877) |

## What reviewers say

### DOFs Fuglebog

[App page](https://appshunter.io/ios/app/dofs-fuglebog/id1170528883)

**In-app purchases:** none


### Rationel

[App page](https://appshunter.io/ios/app/rationel/id1475629436)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DOFs Fuglebog free?

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

### Is Rationel free?

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

### Do DOFs Fuglebog or Rationel have ads?

Neither DOFs Fuglebog nor Rationel shows ads.

### Which is updated more often, DOFs Fuglebog or Rationel?

DOFs Fuglebog ships an update every 6 months, and Rationel every 6 weeks. Most recently, DOFs Fuglebog was updated on October 29, 2026 and Rationel on October 25, 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.*