# FlutterCodeX vs Quick Whistle

The clearest difference is in-app purchases: Quick Whistle at none against FlutterCodeX's 1. FlutterCodeX's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. FlutterCodeX sells 1 one-off in-app purchase. Quick Whistle asks for nothing beyond the download.

FlutterCodeX ships an update every 2 months, Quick Whistle every 4 months. Both last shipped on September 21, 2026.

## The numbers

| Metric | FlutterCodeX | Quick Whistle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 4 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Chengdu Feng Chui Ye Technology Co., Ltd](https://appshunter.io/developer/1608679124) | [Finite Fractal Studios](https://appshunter.io/developer/1746186301) |

## What reviewers say

### FlutterCodeX

[App page](https://appshunter.io/ios/app/fluttercodex/id6749268845)

Explore and learn about Flutter widgets with live examples and source code. Manage your learning materials with a built-in Markdown editor.

**Highlights:** Flutter widget examples, View source code, Markdown document management, Learning material storage, Quick lookup of usage

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Edition | $1.99 | one-time |


### Quick Whistle

[App page](https://appshunter.io/ios/app/quick-whistle/id6754262226)

**In-app purchases:** none


## Frequently asked questions

### Is FlutterCodeX free?

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

### Is Quick Whistle free?

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

### Do FlutterCodeX or Quick Whistle have ads?

Neither FlutterCodeX nor Quick Whistle shows ads.

### Which is updated more often, FlutterCodeX or Quick Whistle?

FlutterCodeX ships an update every 2 months, and Quick Whistle every 4 months. Most recently, FlutterCodeX was updated on September 21, 2026 and Quick Whistle on September 21, 2026.

---

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