Comparison

Idle Zombies vs Idle Alien

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

Head to head
About

Idle Zombies

Defend cities from a relentless zombie horde in this idle defense game. Upgrade your arsenal with earned currency, unlock unique weapons and skills, and battle legendary bosses. It's an easy-to-learn, tough-to-master experience that tests your swiping and tapping skills.

Highlights
  • Idle defense gameplay
  • Upgrade weapons and artillery
  • Battle legendary bosses
  • Unlock unique skills and weapons
  • Crazy Mode for increased challenge
  • Daily login rewards
Read full description

The zombies are invading and only you can defend the cities from total destruction! Surround the gate with the best arsonal you can afford. Swipe away at the zombies with your knife for some extra punch! The more zombies you eliminate the better the guns you can afford! Battle legendary bosses and travel to different cities to defend mankind in this epic idle game. This heartstopping, easy to play, but tough to master zombie tycoon game will test your swiping, focus and tapping skills. Unlock crazy weapons such as an electric fence, air raids, and even a mighty DOG! Can you become the ultimate zombie slayer and save the city? This action packed idle defense game will test your grit. The relentless zombie horde keep coming and it’s up to you to defend the city! How far can you make it? Do you have what it takes to take them down? Upgrade your artillery with the money you earn from slaying the waves of zombies. Travel through space and time defending different locations from the onslaught. The further you get the more challenging the game becomes! Start your adventure now! The one thing you have to ask yourself is: can you handle the CRAZY MODE? Game Features: 1. Crazy Mode This idle game has non-stop adrenaline filled action, and that’s not even mentioning the Crazy Mode. The horde gets stronger and harder. An alarm will go off if they get too close to the gate. Can you stay calm and defend the city? Or will you lose? 2. Battle legendary monsters Gotta slay them all! It will take everything you got to take down the huge epic boss monsters invading the cities! 3. Log on for amazing gifts Need some help progressing? The more you play and defend, the better your rewards you get. 4. Level up your items The more you kill the more money you make. The more you earn the better your equipment becomes. Only then will you become the best zombie slayer in town. 5. Free to play with no WIFI needed! Swipe and tap anytime, anywhere for free! No internet connection is needed! 6. Unique skills and weapons to Unlock! Need help pushing back those zombies? Unlock special abilities like airstrikes or an electric fence to evaporate the dead. Don’t forget the nukes. It's time to become the hero you were destined to become and start defending the world. This is the best incremental zombie simulation there is. Never miss a dull moment with this easy to learn and easy to play game that is almost IMPOSSIBLE to master. Use your guns and knives to slay that horde! Start your mission and never stop destroying! Can you face the walking dead? Visit https://lionstudios.cc/contact-us/ if have any feedback, need help on beating a level or have any awesome ideas you would like to see in the game! From the Studio that brought you Happy Glass, Flip Trickster and Love Balls! Follow us to get news and updates on our other Award Winning titles; https://lionstudios.cc/ Facebook.com/LionStudios.cc Instagram.com/LionStudioscc Twitter.com/LionStudiosCC Youtube.com/c/LionStudiosCC

About

Idle Alien

Engage in a hyper-casual space war by tapping to destroy hostile spaceships. Upgrade your alien heroes to increase damage and unlock new abilities. Enjoy a stress-relieving, offline gaming experience.

Highlights
  • Tap to attack spaceships
  • Upgrade alien heroes
  • Boost damage and gold
  • Offline gameplay
  • Stress-relieving mechanics
  • Unlock new aliens
Features
Read full description

In a galaxy far far away A bunch of hostile spaceships are traveling across universe seeking for destruction Angered by their actions, Alien race rises to fight the oppression They train and start to awakened their inner energy, becoming the Heroes Those Heroes now fly across the universe to protect their homeland So the war continues Idle Alien is a hyper casual game with alien and space theme. Easy to play, stress releasing, and no network required. Control Alien as a Hero to destroy all spaceships. Open more Alien enjoy more fun. HOW TO PLAY: 1 - Tap spaceship to attack 2 - Hide Alien to help you 3 - Update Alien to get more damage 4 - Destroy all spaceships to win level BOOST SYSTEM: 1 - Tap Boost: x10 your tap damage 2 - Double Damage: x2 all Alien damage 3 - Double Gold: x2 money 4 - Double Speed: x2 Speed for all Aliens. If you love the game. Give us your lovely comment. Our page: https://www.facebook.com/idlealien/ Enjoy The Game.

Screenshots

Idle Zombies4 screens
Idle Alien4 screens

Verdict

The call

The clearest difference is review sentiment: Idle Alien at 100% against Idle Zombies's 54%. Idle Alien also leads on in-app purchases (none vs 10) and update cadence (every 11 days vs every 3 weeks). Idle Zombies's advantage is ratings volume (67K vs 123) and rating (4.8 vs 4.5). 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 Zombies sells 10 one-off in-app purchases. Idle Alien asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Idle Zombies holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Idle Zombies has 67K ratings behind it against 123, so its average is the more settled of the two. Written reviews complicate that: 54% of Idle Zombies's written reviews are positive against 100% of Idle Alien's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Idle Zombies ships an update every 3 weeks, Idle Alien every 11 days. The most recent releases landed on September 26, 2026 and July 4, 2026 respectively.

Scorecard7 real differences · 3 level
Idle Zombies versus Idle Alien: the parameters behind the verdict, then further details
ParameterIdle ZombiesIdle Alien
PriceFreeFree
Rating4.8 (67K ratings) — better4.5 (123 ratings)
Positive reviews53.8% of reviews100.0% of reviews — better
Number of ratings67K — better123
Update frequencyEvery 3 weeksEvery 11 days — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.3 — better15.6
Further details — not scored
Size144 MB295 MB
Age rating12+17+
DeveloperLion StudiosViet Game Development Corporation

Customer experience

Idle Zombies

All ratings67,418 ratings
Positive93.6%
Neutral3.4%
Negative3.0%
Written reviews591 reviews
Positive53.8%
Neutral8.5%
Negative37.7%

Idle Alien

All ratings123 ratings
Positive87.0%
Neutral7.3%
Negative5.7%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Idle Zombies

Reported bugs

4 issues
  • Weapons freezing at high upgrade levels
  • Offline revenue not tracking correctly
  • Resets causing loss of progress
  • Ads not working as intended

Requested features

4 requests
  • Auto-upgrade option for weapons
  • More variety in weapon types and abilities
  • Offline progress improvements
  • Better boss fight mechanics

Idle Alien

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Idle Zombies

One-time10
  • Micro Diamond Package$0.99
  • Gift For New Player$0.99
  • Super Weapon Package$0.99
Show 7 more
  • Weapons of destruction$0.99
  • DAM of Knife x 99$0.99
  • Much More Money$1.99
  • No Ad Forever$2.99
  • Week Package$2.99
  • Super Discount Package$9.99
  • City Pass$9.99
None

Idle Alien

No in-app purchases

Questions

Is Idle Zombies free?
Idle Zombies is free to download, with in-app purchases available.
Is Idle Alien free?
Idle Alien is free to download, with no in-app purchases.
Which has better reviews, Idle Zombies or Idle Alien?
Idle Zombies is rated higher. Idle Zombies averages 4.8 out of 5 from 67K ratings, while Idle Alien averages 4.5 from 123 ratings.
Do Idle Zombies or Idle Alien have ads?
Both Idle Zombies and Idle Alien show ads.
Which is updated more often, Idle Zombies or Idle Alien?
Idle Zombies ships an update every 3 weeks, and Idle Alien every 11 days. Most recently, Idle Zombies was updated on September 26, 2026 and Idle Alien on July 4, 2026.

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