# MachXDrone vs Engine Displacement Calc

The clearest difference is price: MachXDrone at Free against Engine Displacement Calc's $4.99. MachXDrone also leads on iOS requirement (12.0 vs 17.0). Engine Displacement Calc's advantage is update cadence (every 6 weeks vs every 5 months). On ads, in-app purchases and device support there is nothing between them.

MachXDrone is free to download; Engine Displacement Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MachXDrone ships an update every 5 months, Engine Displacement Calc every 6 weeks. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | MachXDrone | Engine Displacement Calc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[2.9 (36 ratings)](https://appshunter.io/ios/app/machxdrone/id1602139783/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 12 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Yilushi Technology Co.,ltd](https://appshunter.io/developer/1760309976) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### MachXDrone

[App page](https://appshunter.io/ios/app/machxdrone/id1602139783)

Control a toy drone with your smartphone. View real-time camera feeds in normal or VR mode, and capture photos and videos directly within the app's album.

**Highlights:** Remote drone operation, Real-time camera streaming, Normal and VR viewing modes, Photo and video capture, In-app media album

**Features:** macOS Compatibility

**In-app purchases:** none


### Engine Displacement Calc

[App page](https://appshunter.io/ios/app/engine-displacement-calc/id6761711493)

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

**In-app purchases:** none


## Frequently asked questions

### Is MachXDrone free?

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

### Is Engine Displacement Calc free?

Engine Displacement Calc costs $4.99, with no in-app purchases.

### Do MachXDrone or Engine Displacement Calc have ads?

Neither MachXDrone nor Engine Displacement Calc shows ads.

### Which is updated more often, MachXDrone or Engine Displacement Calc?

MachXDrone ships an update every 5 months, and Engine Displacement Calc every 6 weeks. Most recently, MachXDrone was updated on October 24, 2026 and Engine Displacement Calc on October 18, 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.*