Best Io Game

246+ iOS apps & games curated and reviewed

4.5 avg rating
20 free apps & games
Updated September 2026

Looking for free io game? 20 of our 246+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Io Game (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Agar.ioAgar.ioFree4.5★ (221K)YesYesSep 2026
2Survivor!.ioSurvivor!.ioFree4.7★ (244K)NoYesSep 2026
3Paper.io 2Paper.io 2Free4.5★ (2.9M)YesYesSep 2026
4slither.ioslither.ioFree3.8★ (3K)NoYesSep 2026
5Do Not Fall .ioDo Not Fall .ioFree4.6★ (36K)YesYesSep 2026
6Hole.ioHole.ioFree4.6★ (2M)YesYesSep 2026
7diep.iodiep.ioFree3.8★ (20K)YesNoSep 2026
8Harvest.ioHarvest.ioFree4.5★ (48K)YesYesSep 2026

Top Picks for Io Game

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
  • 🔒 Lack of account portability
  • 🐛 Frequent crashes and lag
  • 🕹️ Unbalanced gameplay (teamers, macros)
Survivor!.io#2

Survivor!.io by HABBY

Survive the fun!
Strong Contender
🎮 Games
4.7😊(244K ratings)
FreeIn-App Purchases
#19in Games
Survivor!.io screenshot 1
Survivor!.io screenshot 2
Survivor!.io screenshot 3
Survivor!.io screenshot 4
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
  • 👍 Generous rewards for free players
  • 👍 Smooth graphics and performance

Room to Improve

  • 🐛 Crashes and freezes
  • 🔍 Lack of transparency in difficulty scaling
  • 🔍 Unbalanced boss encounters
  • 🔍 Repetitive level design
  • 🔍 Overwhelming screen clutter
  • 🔍 Unsatisfactory progression system
Paper.io 2#3

Paper.io 2 by Voodoo

The world's #1 IO game
Worth Considering
🎮 Games
4.5😐(2.9M ratings)
FreeAdsIn-App Purchases
#11in Games
Paper.io 2 screenshot 1
Paper.io 2 screenshot 2
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Paper.io 2 screenshot 5

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.

What We Love

  • 🚀 Smooth gameplay
  • 👍 Fun and addictive
  • 🎨 Variety of skins and characters
  • 📱 Works offline

Room to Improve

  • 🔍 Glitches and bugs causing loss of progress
  • 💸 Excessive ads, even after paying for ad removal
  • 🤖 Unclear if playing against real players or bots
  • 🕰️ Frustrating mid-game ads interrupting gameplay

More Io Game apps to explore

FAQ about Io Game

What is the best io game for iPhone?
Agar.io tops our io game ranking as of September 2026, with a 4.5-star average from 221K App Store ratings, and it's free to download.
Yes — 20 of the top io game we rank are free to download, including Agar.io and Survivor!.io.
Agar.io shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 246+ io game on the iOS App Store as of September 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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