# Idle Tap Zoo vs Stack Up Sushi

The clearest difference is review sentiment: Idle Tap Zoo at 75% against Stack Up Sushi's 0%. Idle Tap Zoo also leads on rating (4.7 vs 2.0) and update cadence (monthly vs every 19 months). Stack Up Sushi's advantage is in-app purchases (none vs 8) and iOS requirement (12.5 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Idle Tap Zoo sells 8 one-off in-app purchases. Stack Up Sushi asks for nothing beyond the download.

Idle Tap Zoo holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Idle Tap Zoo has 604 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Idle Tap Zoo's written reviews are positive against 0% of Stack Up Sushi's.

Idle Tap Zoo ships an update monthly, Stack Up Sushi every 19 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Idle Tap Zoo | Stack Up Sushi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (604 ratings)](https://appshunter.io/ios/app/idle-tap-zoo/id1327502235/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/stack-up-sushi/id1627379907/reviews) |
| Number of ratings | **604** | 1 |
| Positive reviews | **74.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 19 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 120 MB | 155 MB |
| Requires iOS | 15.0 | **12.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tech Tree Games LLC](https://appshunter.io/developer/1175843955) | [MondayOFF](https://appshunter.io/developer/1448226898) |

## What reviewers say

### Idle Tap Zoo

[App page](https://appshunter.io/ios/app/idle-tap-zoo/id1327502235)

Build and manage your dream zoo by tapping to raise and upgrade animals. Expand your park with attractions and decorations, earning profits even while you're away. Trade animals for gems to unlock permanent boosts and create unique habitats.

**Highlights:** Build and customize your zoo, Raise and upgrade zoo animals, Earn profits while idle, Expand with rides and attractions, Trade animals for gems, Unlock permanent upgrades

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Gem Pack | $4.99 | one-time |
| Medium Gem Pack | $9.99 | one-time |
| Rare Animal Pack | $9.99 | one-time |
| Disable Ads | $9.99 | one-time |
| Large Gem Pack | $19.99 | one-time |
| Species Pack | $19.99 | one-time |
| Massive Gem Pack | $29.99 | one-time |
| Epic Animal Pack | $29.99 | one-time |

**What reviewers like**

- 👍 Cute and fun game
- 🚀 Addictive gameplay
- 💡 Unique idle game concept
- 👍 Great for passing time
- 👍 Generous with in-game rewards

**What reviewers complain about**

- 🐛 Bugs and glitches
- 💰 Expensive in-app purchases
- ⏱️ Slow progression and pacing
- 🔍 Difficult to read small text and numbers
- 🔍 Lack of optimization for iPhone X

**Reported bugs**

- Geckos have 0% breeding rate
- Cthulhu level stuck at 3
- Restore purchases not working
- Crashes on iPhone X
- Ads still show up after purchase

**Requested features**

- More animal species and habitats
- Ability to see visitors in the zoo
- Bulk selling option
- Cross-device progress sync
- More customization options


### Stack Up Sushi

[App page](https://appshunter.io/ios/app/stack-up-sushi/id1627379907)

A simple, free-to-play game designed for quick play sessions. Enjoy satisfying graphics and intuitive touch controls. Perfect for filling short gaps in your day.

**Highlights:** Simple touch controls, Free to play, Short play sessions, Satisfying graphics, Hyper casual gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Idle Tap Zoo free?

Idle Tap Zoo is free to download, with in-app purchases available.

### Is Stack Up Sushi free?

Stack Up Sushi is free to download, with no in-app purchases.

### Which has better reviews, Idle Tap Zoo or Stack Up Sushi?

Idle Tap Zoo is rated higher. Idle Tap Zoo averages 4.7 out of 5 from 604 ratings, while Stack Up Sushi averages 2.0 from 1 ratings.

### Do Idle Tap Zoo or Stack Up Sushi have ads?

Both Idle Tap Zoo and Stack Up Sushi show ads.

### Which is updated more often, Idle Tap Zoo or Stack Up Sushi?

Idle Tap Zoo ships an update monthly, and Stack Up Sushi every 19 months. Most recently, Idle Tap Zoo was updated on October 21, 2026 and Stack Up Sushi on October 24, 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.*