# XDFLY vs Stamp Stack

The clearest difference is price: XDFLY at Free against Stamp Stack's $3.99. XDFLY also leads on iOS requirement (12.4 vs 15.5). On ads, in-app purchases and device support there is nothing between them.

XDFLY is free to download; Stamp Stack costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | XDFLY | Stamp Stack |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/xdfly/id6449901550/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | — |
| Size | 16 MB | 82 MB |
| Requires iOS | **12.4** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [鹏 杜](https://appshunter.io/developer/1623719348) | [Daniel Goodwin](https://appshunter.io/developer/1830723743) |

## What reviewers say

### XDFLY

[App page](https://appshunter.io/ios/app/xdfly/id6449901550)

Connects to your device's Bluetooth to adjust ESC parameters, view data, and upgrade firmware. Offers a direct link for managing electronic speed controllers.

**Highlights:** Bluetooth ESC connection, Parameter adjustment, Data viewing, Firmware upgrades

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Stack

[App page](https://appshunter.io/ios/app/stamp-stack/id6757575828)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is XDFLY free?

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

### Is Stamp Stack free?

Stamp Stack costs $3.99, with no in-app purchases.

### Do XDFLY or Stamp Stack have ads?

Neither XDFLY nor Stamp Stack shows ads.

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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.*