# Memory Games with Animals vs Billy Box (Stack Attack)

The clearest difference is review sentiment: Memory Games with Animals at 74% against Billy Box (Stack Attack)'s 0%. Billy Box (Stack Attack)'s advantage is update cadence (weekly vs every 4 months) and iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Memory Games with Animals sells 1 one-off in-app purchase and Billy Box (Stack Attack) sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Memory Games with Animals ships an update every 4 months, Billy Box (Stack Attack) weekly. The most recent releases landed on September 29, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Memory Games with Animals | Billy Box (Stack Attack) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (25K ratings)](https://appshunter.io/ios/app/memory-games-with-animals/id631738108/reviews)** | — |
| Number of ratings | **25K** | — |
| Positive reviews | **74.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 20 MB | 57 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergio Licea](https://appshunter.io/developer/469446041) | [Alessandro de Sanctis](https://appshunter.io/developer/694885740) |

## What reviewers say

### Memory Games with Animals

[App page](https://appshunter.io/ios/app/memory-games-with-animals/id631738108)

Enhance your memory with a fun matching pairs game featuring various card categories like animals, dinosaurs, and fruits. Adjust difficulty levels and enjoy a no-ad experience with sound effects and global leaderboards.

**Highlights:** Matching pairs gameplay, Multiple card categories, Adjustable difficulty levels, Over 270 card images, No ads, Sound effects, Game Center leaderboards

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Images | $1.99 | one-time |

**What reviewers like**

- 👍 Good for short-term memory skills
- 👍 Suitable for 2yo to adults
- 👍 Great brain exercise
- 👍 Fun and interesting game

**What reviewers complain about**

- 🐛 Lacks timer and scoring features
- 💰 Paid content required to unlock more features
- 🐛 Unable to advance beyond basic levels

**Reported bugs**

- Game asks for permissions to access contacts without explanation
- Crashes or freezes on some devices

**Requested features**

- Add timer and scoring features
- Unlock more free content
- Improve progress tracking and performance metrics
- Include pictures for older audiences


### Billy Box (Stack Attack)

[App page](https://appshunter.io/ios/app/billy-box-stack-attack/id1146154065)

Arrange boxes in challenging levels based on a classic 90s puzzle game. Test your skills and spatial reasoning in this engaging experience.

**Highlights:** Box stacking puzzle gameplay, Multiple difficulty levels, Inspired by 90s vintage puzzles, Modernized puzzle mechanics, Challenging level design

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Unlimited Lives | $0.99 | one-time |
| Unlock all Worlds | $0.99 | one-time |


## Frequently asked questions

### Is Memory Games with Animals free?

Memory Games with Animals is free to download, with in-app purchases available.

### Is Billy Box (Stack Attack) free?

Billy Box (Stack Attack) is free to download, with in-app purchases available.

### Do Memory Games with Animals or Billy Box (Stack Attack) have ads?

Neither Memory Games with Animals nor Billy Box (Stack Attack) shows ads.

### Which is updated more often, Memory Games with Animals or Billy Box (Stack Attack)?

Memory Games with Animals ships an update every 4 months, and Billy Box (Stack Attack) weekly. Most recently, Memory Games with Animals was updated on September 29, 2026 and Billy Box (Stack Attack) on September 19, 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.*