# Robox Duck vs Entropy

The clearest difference is update cadence: Robox Duck at weekly against Entropy's every 2 weeks. Robox Duck also leads on iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Robox Duck sells 10 in-app purchases, starting at $4.00 per month and Entropy sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Robox Duck ships an update weekly, Entropy every 2 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | Robox Duck | Entropy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (51 ratings)](https://appshunter.io/ios/app/robox-duck-tap-and-earn/id6754204331/reviews)** | — |
| Number of ratings | **51** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 119 MB | 6 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RoboxOne OU](https://appshunter.io/developer/1659907857) | [Erdener Uyan](https://appshunter.io/developer/1843571074) |

## What reviewers say

### Robox Duck

[App page](https://appshunter.io/ios/app/robox-duck-tap-and-earn/id6754204331)

Tap a virtual duck to earn cryptocurrency tokens. Boost your duck's earnings and invite friends for bonuses. This game offers a simple and rewarding way to engage with play-to-earn mechanics.

**Highlights:** Tap duck to earn ROX tokens, Boost duck for faster earnings, Invite friends for bonus rewards, Instant reward withdrawal, Play-to-earn crypto game

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Boost 5X - 1 month | $4.00 | per month |
| Boost 10X - 1 month | $8.00 | per month |
| Boost 20X - 1 month | $16.00 | per month |
| Boost 40X - 1 month | $31.99 | per month |
| Boost 30X - 3 months | $56.90 | per 3 months |
| Boost 10X - 1 month | $8.29 | one-time |
| Boost 5X - 3 months | $9.79 | one-time |
| Boost 20X - 1 month | $16.49 | one-time |
| Boost 30X - 3 months | $58.90 | one-time |
| Boost 50X - 3 months | $97.90 | one-time |


### Entropy

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

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

**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 Robox Duck free?

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

### Is Entropy free?

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

### Do Robox Duck or Entropy have ads?

Neither Robox Duck nor Entropy shows ads.

### Which is updated more often, Robox Duck or Entropy?

Robox Duck ships an update weekly, and Entropy every 2 weeks. Most recently, Robox Duck was updated on November 5, 2026 and Entropy on November 5, 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.*