# Charge the Robot vs FE Exam Prep

The clearest difference is price: Charge the Robot at Free against FE Exam Prep's $24.99. Charge the Robot also leads on iOS requirement (13.0 vs 17.0). FE Exam Prep's advantage is in-app purchases (none vs 4) and update cadence (every 2 months vs every 5 months). On ads and device support there is nothing between them.

Charge the Robot is free to download; FE Exam Prep costs $24.99 up front. Charge the Robot sells 4 in-app purchases, starting at $7.99 per month. FE Exam Prep asks for nothing beyond the download.

Charge the Robot ships an update every 5 months, FE Exam Prep every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Charge the Robot | FE Exam Prep |
| --- | --- | --- |
| Price | **Free** | $24.99 |
| Rating | **[4.4 (64 ratings)](https://appshunter.io/ios/app/charge-the-robot/id1532398652/reviews)** | — |
| Number of ratings | **64** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 323 MB | 10 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Learny Land](https://appshunter.io/developer/1380183676) | [Kathryn Halterman](https://appshunter.io/developer/1879154277) |

## What reviewers say

### Charge the Robot

[App page](https://appshunter.io/ios/app/charge-the-robot/id1532398652)

Solve logic puzzles by manipulating gears, water, and steam to power a robot. Explore mechanisms and learn the basics of electricity, mechanics, and physics in a stress-free environment. Create and share your own levels.

**Highlights:** Over 100 levels, Free play, no rules or stress, Learn electricity, mechanics, physics, Develop logic and problem-solving skills, 3 distinct worlds: gears, water, steam, Create and share custom levels, Includes a theory section for expanded learning

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Learny Land Pass - Monthly | $7.99 | per month |
| Learny Land Pass - Monthly | $8.99 | per month |
| Learny Land Pass - Annual | $39.99 | per year |
| Learny Land Pass - Annual | $49.99 | per year |


### FE Exam Prep

[App page](https://appshunter.io/ios/app/fe-exam-prep/id6781744226)

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

**In-app purchases:** none


## Frequently asked questions

### Is Charge the Robot free?

Charge the Robot is free to download, with in-app purchases available.

### Is FE Exam Prep free?

FE Exam Prep costs $24.99, with no in-app purchases.

### Do Charge the Robot or FE Exam Prep have ads?

Neither Charge the Robot nor FE Exam Prep shows ads.

### Which is updated more often, Charge the Robot or FE Exam Prep?

Charge the Robot ships an update every 5 months, and FE Exam Prep every 2 months. Most recently, Charge the Robot was updated on October 27, 2026 and FE Exam Prep on October 25, 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.*