Best .io Apps & Games

248+ iOS apps & games curated and reviewed

4.4 avg rating
20 free apps & games
Updated August 2026

If you already know Agar.io, this is the deeper bench. 248+ .io apps and games for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.

Compare top .io Apps & Games (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Agar.ioAgar.ioFree4.5★ (221K)YesYesAug 2026
2slither.ioslither.ioFree3.8★ (3K)NoYesAug 2026
3Survivor!.ioSurvivor!.ioFree4.7★ (244K)NoYesAug 2026
4Paper.io 2Paper.io 2Free4.5★ (2.8M)YesYesAug 2026
5diep.iodiep.ioFree3.8★ (20K)YesNoAug 2026
6State.io - Conquer the WorldState.io - Conquer the WorldFree4.6★ (248K)YesYesAug 2026
7Hole.ioHole.ioFree4.6★ (2M)YesYesAug 2026
8Aquapark.ioAquapark.ioFree4.6★ (2.8M)YesYesAug 2026

Top Picks for .io

Agar.io#1

Agar.io by Miniclip.com

Play with friends online
Editor's Choice
🎮 Games
4.5😐(221K ratings)
FreeAdsIn-App Purchases
Agar.io screenshot 1
Agar.io screenshot 2
Agar.io screenshot 3
Agar.io screenshot 4
Agar.io screenshot 5
Agar.io screenshot 6

Grow your cell by consuming smaller cells and avoiding larger ones in this online multiplayer game. Master tactics like splitting and dodging to become the biggest cell. Unlock secret skins with special usernames.

What We Love

  • 🚀 Addictive gameplay
  • 🔥 Iconic game
  • 💎 Great rewards system
  • 🎨 Customizable skins

Room to Improve

  • 🔍 Difficulty for new players
  • 🕰️ Slow progression
  • 💰 Excessive ads and microtransactions
slither.io#2

slither.io by Lowtech Studios LLC

Multiplayer slither game
Strong Contender
🎮 Games
3.8😐(3K ratings)
FreeIn-App Purchases
#41in Games
slither.io screenshot 1
slither.io screenshot 2
slither.io screenshot 3
slither.io screenshot 4
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slither.io screenshot 6

Compete against other players in a multiplayer game where you grow by consuming the remains of defeated opponents. Outmaneuver larger players to win and become the longest slither.

What We Love

  • 🚀 Addictive gameplay
  • 👍 Customizable snake skins
  • 🚀 Offline mode available
  • 👍 No ads (if paid)

Room to Improve

  • 🐛 Frequent lags and freezes
  • 🐛 Glitches causing unfair deaths
  • 🐛 Inability to control snake movements
Survivor!.io#3

Survivor!.io by HABBY

Survive the fun!
Worth Considering
🎮 Games
4.7😊(244K ratings)
FreeIn-App Purchases
#25in Games
Survivor!.io screenshot 1
Survivor!.io screenshot 2
Survivor!.io screenshot 3
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Survivor!.io screenshot 5
Survivor!.io screenshot 6

Battle hordes of zombies as a heroic warrior with unlimited potential. Survive overwhelming odds with one-hand controls and unlimited skill combinations. Face over 1000 monsters at once and clear challenging maps.

What We Love

  • 🚀 No forced ads
  • 👍 Fun and addictive gameplay
  • 💡 Accurate to the ads
  • 🚀 No pay-to-win mechanics

Room to Improve

  • 🐛 Crashes and freezes
  • 🔍 Lack of transparency in difficulty scaling
  • 🔍 Unbalanced boss encounters

More .io apps to explore

4
Paper.io 2
Paper.io 2
Paper.io 2
The world's #1 IO game
Free

Expand your territory by drawing lines and capturing zones in this addictive multiplayer game. Outmaneuver opponents in fast-paced battles, collect unique skins, and aim to conquer the entire map.

Expand territory by drawing trailsCapture zones before enemiesFast-paced online multiplayer
🎮 Games
(2.8M)
free with in-app purchases
5
diep.io
diep.io
diep.io
by VexxusArts Ltd
Free

Engage in massive online multiplayer tank battles. Destroy blocks and other players to gain experience, level up your tank's stats, and upgrade to different classes. Dominate the leaderboard in this fast-paced action game optimized for mobile.

Online multiplayer actionDozens of players per gameFast-paced tank warfare
🎮 Games
(20K)
ad-supported
6
State.io - Conquer the World
State.io - Conquer the World
State.io - Conquer the World
War strategy: Epic battle game
Free

Engage in an abstract real-time strategy game where you command troops to capture territories. Solve tactical puzzles to outwit opponents, expand your influence, and defend your borders in this exciting countries takeover.

Command troops to capture statesSolve strategic puzzlesTactical dot clashes
🎮 Games
(248K)
free with in-app purchases
7
Hole.io
Hole.io
Hole.io
Eat the world
Free

Control a black hole to consume everything in sight, growing larger as you play. Compete against other players in an arena, swallowing buildings and expanding your reach before time runs out. Customize your black hole with different skins.

Consume objects to growCompete against other playersExpand your black hole
🎮 Games
(2M)
free with in-app purchases
8
Aquapark.io
Aquapark.io
Aquapark.io
Best water slide game
Free

Race down a vibrant water slide, aiming to be the first to reach the end. Bump other players during the exhilarating competition for a fun and sunny experience.

Water slide racingMultiplayer competitionBump other players
🎮 Games
(2.8M)
free with in-app purchases
9
Harvest.io
Harvest.io
Harvest.io
Farming arcade & simulator
Free

Drive a tractor across fields to harvest crops in this io-style farming simulator. Grow your trailer by collecting resources, but avoid colliding with yourself or other players. Enjoy satisfying gameplay with colorful graphics and competitive races.

Tractor-based crop harvestingSnake-like mechanicsIO-style arcade gameplay
🎮 Games
(48K)
free with in-app purchases
10
Fish Eater.io
Fish Eater.io
Fish Eater.io
Swallow and Evolve
Free

Dive into an underwater world as an ordinary fish. Battle, eat, grow, and evolve to conquer the ocean. Merge with other fish, fight sharks, and ascend to become the ultimate overlord of the sea.

Battle and eat to growEvolve your fishMerge and gain power
🎮 Games
(58K)
free with in-app purchases
11
Snowball.io™
Snowball.io™
Snowball.io™
Push Off Your Opponents
Free

Engage in an addictive game with simple controls. Grow a snowball and knock opponents off the playfield. Strategize with one giant ball or many small ones, using direct bumps or precise shots.

Simple swipe controlsGrow snowballsPush opponents off
🎮 Games
(461K)
ad-supported
12
Snake.io - Fun Online Snake
Snake.io - Fun Online Snake
Snake.io - Fun Online Snake
New Battle Royale Snake Games
Free

Grow your snake by consuming other players and become the largest on the board. Use strategic boosts and precise controls to outmaneuver opponents and survive as long as possible in this engaging battle royale.

Grow and dominate the boardSmooth gameplayNo lag connectivity
🎮 Games
(471K)
free with in-app purchases
13
Paper.io 3D
Paper.io 3D
Paper.io 3D
Enter the new dimension!
Free

Experience a unique drawing game in a new 3D dimension. Expand your territory by coloring unique shapes while avoiding other players. Collect stars to unlock new levels and bonuses.

3D drawing experienceCreate your zoneAvoid other players
🎮 Games
(305K)
free with in-app purchases
14
Crowd City
Crowd City
Crowd City
The real crowd experience!
Free

Lead a growing crowd through the city, absorbing more people to become the largest. Outmaneuver and crush opponents with your overwhelming numbers to dominate the town. Experience the thrill of real crowd dynamics in this engaging game.

Gather people across the cityBecome the biggest crowdCrush opponents
🎮 Games
(1M)
free with in-app purchases
15
mope.io
mope.io
mope.io
The official mobile app
Free

Embark on a survival adventure in a vast world, growing larger by consuming food and other players. Evolve into powerful creatures and dominate the leaderboard. Experience the thrill of the popular browser game, now accessible on your mobile device.

Multiplayer survival gameplayGrow by consuming foodEvolve into different animals
🎮 Games
(3.5K)
ad-supported
16
ZombsRoyale.io
ZombsRoyale.io
ZombsRoyale.io
100-Player 2D Battle Royale
Free

Compete in a 2D battle royale game with up to 100 players in real-time. Choose from various game modes, including solo, duo, squad, and limited-time events like zombie survival and crystal destruction. Customize your character with over 1000 cosmetics and climb leaderboards.

100-player real-time battle royaleMultiple game modes (Solo, Duo, Squad)Limited-time game modes
🎮 Games
(136K)
free with in-app purchases
17
Dune!
Dune!
Dune!
Smoothest game ever!
Free

Navigate a challenging jumping game where precision is key. Score points by jumping above the line, but be mindful of increasingly difficult landings. Avoid crashing to maintain a smooth gameplay experience.

Score by jumping above the lineIncreasing landing difficultyAvoid crashing
🎮 Games
(544K)
free with in-app purchases
18
Paper.io
Paper.io
Paper.io
Cover all the other colors
Free

Conquer territory by expanding your colored area. Outmaneuver opponents and avoid having your tail touched. Victory is achieved by claiming all available space in this simple yet strategic game.

Conquer territoryOutmaneuver opponentsStrategic gameplay
🎮 Games
(156K)
free with in-app purchases
19
Arrow.io
Arrow.io
Arrow.io
Battle Royale,Multiplayer PvP
Free

Engage in fast-paced multiplayer battles as a pixelated character. Aim and shoot arrows to defeat opponents worldwide. Discover random skill upgrades with each update for unpredictable gameplay.

Virtual control lever for movementDefeat opponents with arrowsRandom skill upgrades
🎮 Games
(3.4K)
free with in-app purchases
20
Brutal.io
Brutal.io
Brutal.io
Online io arena
Free

Engage in real-time 2D physics battles in an online arena. Control a car with a flail, outmaneuver opponents, and use strategic physics-based tactics to win. Avoid sentinels that steal energy.

Real-time online battles2D physics gameplayCar and flail control
🎮 Games
(5.1K)
ad-supported

FAQ about .io

What are the best .io apps & games for iPhone?
Agar.io tops our .io apps & games ranking as of August 2026, with a 4.5-star average from 221K App Store ratings, and it's free to download.
Yes — 20 of the top .io apps & games we rank are free to download, including Agar.io and slither.io.
Agar.io shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 248+ .io apps & games on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Agar.io is an online multiplayer game where players control a cell and aim to grow larger by consuming smaller cells. The objective is to survive and become the biggest cell in the game by strategically eating other players while avoiding those larger than you.
You control your cell using touchscreen controls designed for mobile devices. Eat smaller cells to grow, and use tactics like splitting and dodging to catch other players or escape danger. The game is played online with players from around the world.

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