# Bitcoin Puzzle vs Entropy

The clearest difference is in-app purchases: Bitcoin Puzzle at none against Entropy's 4. Bitcoin Puzzle also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (15.1 vs 18.6). Entropy's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Entropy sells 4 one-off in-app purchases. Bitcoin Puzzle asks for nothing beyond the download.

Bitcoin Puzzle ships an update every 4 days, Entropy every 2 weeks. The most recent releases landed on June 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Bitcoin Puzzle | Entropy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bitcoin-puzzle/id6736991533/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 36 MB | 6 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AUS DEV](https://appshunter.io/developer/1760156392) | [Erdener Uyan](https://appshunter.io/developer/1843571074) |

## What reviewers say

### Bitcoin Puzzle

[App page](https://appshunter.io/ios/app/bitcoin-puzzle/id6736991533)

Explore cryptography and Bitcoin by generating and testing private keys against community-funded addresses. This app automates the process, offering a chance to unlock real Bitcoin rewards with minimal effort.

**Highlights:** Automated private key generation, Testing keys against funded Bitcoin addresses, Community-funded Bitcoin rewards, Secure and private participation, Innovative key generation algorithm

**Features:** macOS Compatibility

**In-app purchases:** none


### Entropy

[App page](https://appshunter.io/ios/app/entropy-zero/id6757635585)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Emergency Kit | $0.99 | one-time |
| Hacker Bundle | $2.99 | one-time |
| Developer Access | $4.99 | one-time |
| Survival Mode | $9.99 | one-time |


## Frequently asked questions

### Is Bitcoin Puzzle free?

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

### Is Entropy free?

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

### Do Bitcoin Puzzle or Entropy have ads?

Bitcoin Puzzle shows ads; Entropy does not.

### Which is updated more often, Bitcoin Puzzle or Entropy?

Bitcoin Puzzle ships an update every 4 days, and Entropy every 2 weeks. Most recently, Bitcoin Puzzle was updated on June 10, 2026 and Entropy on September 17, 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.*