Comparison

Idle Tap Zoo vs Stack Up Sushi

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Idle Tap Zoo

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
Read full description

Tap, collect and raise your very own zoo animals in Idle Tap Zoo, the incremental idle zoo clicker game! Raise zoo animals and upgrade them to increase their birth rate and value, then sell them for a profit to expand your business with just a tap! Use your profits to build your own custom zoo! Manage a zoo simulation and improve it with the small upgrades like bathrooms and food stalls to attract more visitors and become the ultimate business manager. More visitors means more money, and before you know it, you'll be able to expand your zoo with aquariums and safari rides! In this idle game, your zoo will continue to grow and make you money that can be used to unlock new zoo animals like monkeys, pandas, gorillas and lions! Become a business manager and trade your animals in bulk at the trading post for gems. Use gems to research permanent upgrades for large boosts and continue to expand your zoo all with a simple tap! How much will your zoo be worth? Idle Tap Zoo Features: Build Your Zoo • Manage a zoo that can be customized exactly to your liking! Create the perfect business simulation! • Create a dream zoo and open it to visitors to begin increasing your income and grow your business empire • Customize your zoo with special decorations, fun rides, and all of your favorite zoo animals! • Create a jungle habitat for the monkeys and gorillas! Create a lush bamboo forest for your tigers and pandas! Raise Animals • Raise zoo animals – Buy and sell your favorite zoo animals • Raise animals and manage their population based on their birth and death rate percentage • Stock your food with bananas for the gorillas and monkeys and bamboo for the pandas! • Upgrade each zoo animals to help its survival rate and sell price • Trade your zoo animals at the trade post for gems which can be used to boost your progress Idle Progress • A unique incremental/idle game experience without too much clicking • The idle clicker game that lets you grow and learn – read fun zoo facts! • Idle Progress – Your zoo will continue to grow and make money while you're gone * Enjoy an idle safari in your pocket-return to the game to purchase rare attractions! Expand Your Zoo • Manage a zoo and tap to invest in improvements that can permanently increase zoo animals’ birth rate • Be the zoo manager and increase the maximum time the zoo can run without you. Run a perfect zoo simulation! • Build your zoo to be the best and earn as many achievements as possible Build your dream zoo filled with fun rides, great attractions and all of your favorite zoo animals! Tap to raise rare animals like monkeys, pandas and lions OH MY! Continue to expand your zoo in the best idle clicker simulation game, Idle Tap Zoo! Download Idle Tap Zoo today to start managing a zoo! Idle Tap Zoo does not require an internet connection, and only watch ads if you want. See this game and other incremental, idle, tapper and clicker games on the incremental games subreddit

About

Stack Up Sushi

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
Read full description

· · · · · · Game Feature · · · · · · · » Simply touch to play the game » Free to play » Just play this game on your 10 minutes of free time :) » Satisfying graphics Developer - Best Hyper Casual Game Developer South Korea

Screenshots

Idle Tap Zoo4 screens
Stack Up Sushi4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Idle Tap Zoo versus Stack Up Sushi: the parameters behind the verdict, then further details
ParameterIdle Tap ZooStack Up Sushi
PriceFreeFree
Rating4.7 (604 ratings) — better2.0 (1 ratings)
Positive reviews74.9% of reviews — better0.0% of reviews
Number of ratings604 — better1
Update frequencyMonthly — betterEvery 19 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.5 — better
Further details — not scored
Size120 MB155 MB
Age rating4+4+
DeveloperTech Tree Games LLCMondayOFF

Customer experience

Idle Tap Zoo

All ratings602 ratings
Positive93.7%
Neutral3.3%
Negative3.0%
Written reviews283 reviews
Positive74.9%
Neutral11.7%
Negative13.4%

Stack Up Sushi

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Idle Tap Zoo

Reported bugs

5 issues
  • 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

6 requests
  • More animal species and habitats
  • Ability to see visitors in the zoo
  • Bulk selling option
  • Cross-device progress sync
  • More customization options
Show 1 more
  • Faster breeding and progression

Stack Up Sushi

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Idle Tap Zoo

One-time8
  • Small Gem Pack$4.99
  • Medium Gem Pack$9.99
  • Rare Animal Pack$9.99
Show 5 more
  • Disable Ads$9.99
  • Large Gem Pack$19.99
  • Species Pack$19.99
  • Massive Gem Pack$29.99
  • Epic Animal Pack$29.99
None

Stack Up Sushi

No in-app purchases

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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