# Butterfly Training vs huoltu

The clearest difference is update cadence: huoltu at every 2 weeks against Butterfly Training's every 4 months. Butterfly Training's advantage is iOS requirement (9.0 vs 15.0). 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.

Butterfly Training ships an update every 4 months, huoltu every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Butterfly Training | huoltu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 40 MB | 38 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BUTTERFLY AERO TRAINING](https://appshunter.io/developer/1481266120) | [NOVODEV](https://appshunter.io/developer/1624779858) |

## What reviewers say

### Butterfly Training

[App page](https://appshunter.io/ios/app/butterfly-training/id1153427889)

**Features:** macOS Compatibility

**In-app purchases:** none


### huoltu

[App page](https://appshunter.io/ios/app/huoltu/id1624779856)

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

**In-app purchases:** none


## Frequently asked questions

### Is Butterfly Training free?

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

### Is huoltu free?

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

### Do Butterfly Training or huoltu have ads?

Neither Butterfly Training nor huoltu shows ads.

### Which is updated more often, Butterfly Training or huoltu?

Butterfly Training ships an update every 4 months, and huoltu every 2 weeks. Most recently, Butterfly Training was updated on November 6, 2026 and huoltu on November 3, 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.*