# Felgo 4 QML Dev App vs ShellTime.xyz

The clearest difference is in-app purchases: Felgo 4 QML Dev App at none against ShellTime.xyz's 2. Felgo 4 QML Dev App also leads on iOS requirement (16.0 vs 26.2). ShellTime.xyz's advantage is update cadence (weekly vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. ShellTime.xyz sells 2 in-app purchases, starting at $14.99 per month. Felgo 4 QML Dev App asks for nothing beyond the download.

Felgo 4 QML Dev App ships an update every 6 months, ShellTime.xyz weekly. Both last shipped on October 9, 2026.

## The numbers

| Metric | Felgo 4 QML Dev App | ShellTime.xyz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Size | 132 MB | 16 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [FELGO GmbH](https://appshunter.io/developer/606142210) | [乐 贺](https://appshunter.io/developer/1537827917) |

## What reviewers say

### Felgo 4 QML Dev App

[App page](https://appshunter.io/ios/app/felgo-4-qml-dev-app/id1669213808)

**Features:** Vision Pro support

**In-app purchases:** none


### ShellTime.xyz

[App page](https://appshunter.io/ios/app/shelltimexyz/id6757661383)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShellTime Pioneer Monthly | $14.99 | per month |
| ShellTime Pioneer Yearly | $149.99 | per year |


## Frequently asked questions

### Is Felgo 4 QML Dev App free?

Felgo 4 QML Dev App is free to download, with no in-app purchases.

### Is ShellTime.xyz free?

ShellTime.xyz is free to download, with in-app purchases available.

### Do Felgo 4 QML Dev App or ShellTime.xyz have ads?

Neither Felgo 4 QML Dev App nor ShellTime.xyz shows ads.

### Which is updated more often, Felgo 4 QML Dev App or ShellTime.xyz?

Felgo 4 QML Dev App ships an update every 6 months, and ShellTime.xyz weekly. Most recently, Felgo 4 QML Dev App was updated on October 9, 2026 and ShellTime.xyz on October 9, 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.*