# REO Mechanical Engineering vs Drone Part 107 Test Prep

The clearest difference is in-app purchases: REO Mechanical Engineering at none against Drone Part 107 Test Prep's 4. Drone Part 107 Test Prep's advantage is update cadence (every 4 days vs every 21 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Drone Part 107 Test Prep sells 4 in-app purchases, starting at $6.99 per 7 days. REO Mechanical Engineering asks for nothing beyond the download.

REO Mechanical Engineering ships an update every 21 months, Drone Part 107 Test Prep every 4 days. The most recent releases landed on September 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | REO Mechanical Engineering | Drone Part 107 Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 4 days** |
| Size | 452 MB | 25 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Rex Banggawan](https://appshunter.io/developer/1516403954) | [FLY SKY PTY LTD](https://appshunter.io/developer/1838696534) |

## What reviewers say

### REO Mechanical Engineering

[App page](https://appshunter.io/ios/app/reo-mechanical-engineering/id1616497471)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Drone Part 107 Test Prep

[App page](https://appshunter.io/ios/app/drone-part-107-test-prep/id6774033567)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Drone Part 107 Full Access | $6.99 | per 7 days |
| Drone Part 107 Full Access | $16.99 | per month |
| Drone Part 107 Full Access | $39.99 | per 3 months |
| Unlock Full Access | $4.99 | one-time |


## Frequently asked questions

### Is REO Mechanical Engineering free?

REO Mechanical Engineering is free to download, with no in-app purchases.

### Is Drone Part 107 Test Prep free?

Drone Part 107 Test Prep is free to download, with in-app purchases available.

### Do REO Mechanical Engineering or Drone Part 107 Test Prep have ads?

Neither REO Mechanical Engineering nor Drone Part 107 Test Prep shows ads.

### Which is updated more often, REO Mechanical Engineering or Drone Part 107 Test Prep?

REO Mechanical Engineering ships an update every 21 months, and Drone Part 107 Test Prep every 4 days. Most recently, REO Mechanical Engineering was updated on September 17, 2026 and Drone Part 107 Test Prep on October 8, 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.*