# USB Challenge vs Impossible Charge

The clearest difference is rating: Impossible Charge at 4.2 against USB Challenge's 2.5. Impossible Charge also leads on in-app purchases (none vs 1) and ratings volume (25 vs 2). USB Challenge's advantage is ads (none vs shown) and iOS requirement (7.1 vs 15.0). On price and device support there is nothing between them.

Both are free to download. USB Challenge sells 1 one-off in-app purchase. Impossible Charge asks for nothing beyond the download.

Impossible Charge holds the better App Store score, 4.2 against 2.5. That said, the two scores are not equally well evidenced: Impossible Charge has 25 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of USB Challenge's written reviews are positive against 59% of Impossible Charge's.

## The numbers

| Metric | USB Challenge | Impossible Charge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/usb-challenge-speed-thinking-game/id1094237228/reviews) | **[4.2 (25 ratings)](https://appshunter.io/ios/app/impossible-charge/id1120683439/reviews)** |
| Number of ratings | 2 | **25** |
| Positive reviews | 50.0% of reviews | **59.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 116 MB |
| Requires iOS | **7.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rami Moghrabi](https://appshunter.io/developer/1146153124) | [Most Played Games Inc](https://appshunter.io/developer/1119208391) |

## What reviewers say

### USB Challenge

[App page](https://appshunter.io/ios/app/usb-challenge-speed-thinking-game/id1094237228)

Test your reflexes by quickly matching the correct side of a USB plug to its socket. Swipe to insert the plug and keep your device charged before time runs out. A fast-paced game designed to challenge your speed and accuracy.

**Highlights:** Match USB plug sides, Swipe to insert, Timed challenges, Fast reflexes required, Device charging simulation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove ads | $0.99 | one-time |


### Impossible Charge

[App page](https://appshunter.io/ios/app/impossible-charge/id1120683439)

A simple and fun addictive game where players charge batteries. Avoid running out of power by ensuring a good charge. Offers over 400 levels with surprises on later stages.

**Highlights:** Charge batteries, Addictive gameplay, Over 400 levels, Play anywhere, Surprise elements

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

**In-app purchases:** none

**What reviewers like**

- 🤩 Addictive gameplay
- 🧠 Brain challenging
- 👍 Fun and enjoyable
- 🚀 Smooth performance
- 🏆 Great for competition

**What reviewers complain about**

- 😠 Frustrating levels
- ⚖️ Unfair difficulty
- ❓ Confusing mechanics
- 💸 Perceived monetization tactics

**Reported bugs**

- Level 30 impossible to beat
- Level 39 impossible to beat
- Algorithm errors at higher levels
- Game rigged to make users lose
- Specific target numbers unobtainable

**Requested features**

- Add a way to look back on levels
- Update max charge to 1000
- Add celebratory sounds on level completion
- Add an endless mode
- Option to change battery color


## Frequently asked questions

### Is USB Challenge free?

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

### Is Impossible Charge free?

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

### Which has better reviews, USB Challenge or Impossible Charge?

Impossible Charge is rated higher. USB Challenge averages 2.5 out of 5 from 2 ratings, while Impossible Charge averages 4.2 from 25 ratings.

### Do USB Challenge or Impossible Charge have ads?

Impossible Charge shows ads; USB Challenge does not.

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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.*