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Grow as fast as you can! 
Multiplayer online game where you play as a bacteria that consumes literally everything in its way!

Start the game being a tiny bacteria and eat the smaller ones to grow rapidly. It takes a lot to survive as you should avoid attacks of bigger bacteria as they are eager to eat you as well. When your bacteria is big enough to pose a danger for other players, start hunting them!

The game is quite immersive: you should constantly grow but don't forget to escape from your rivals, as all of them are real people. Every player can become significantly bigger or lose all the progress in a moment, be careful :).

After every game session, you get experience points depending on the finite size of your bacteria and session time. With these points, you can get the level up and unlock some additional features (e.g. bigger initial mass or exclusive skins). 

The more actions you make during a game session, the more experience you get, so don't lapse into despondency, you will be rewarded for all your efforts!
If you die at the very start, be patient, improve your skills and try again :)

Game modes:
- Teams
- Experimental
- InstantMerge
- Crazy
- SelfFeed
- 2vs2
- Ultra
- Battle Royale
- Minions
- Dual
- Unofficial modes

Unique features:
- video replays
- customizations
- separation by the regions
- friends invitation system

Information about the auto-renewable nature of our subscription:
We offer the following subscription options:
Monthly Royal Membership is a monthly subscription for $5.99 (US). The benefits include blocking all the Ads, doubled amount of free and rewarded coins as well as playing field coins, VIP marks in the profile picture and nickname in the chat, 50% off for Boosters and Skins price and 20% boost while gaining experience and 25 % boost to starting mass.
This price is established for the US customers. The pricing for other countries may vary depending on the currency rate, and actual charges may be converted to your local currency depending on the country.
Payment will be charged to iTunes Account at confirmation of purchase
Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current subscription. Account will be charged for renewal within the 24 hours before the end of the current subscription.
Subscriptions may be managed by the user, and auto-renewal may be turned off by going to the user's Account Settings after the purchase.
Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable
Enjoy 3-day free trial to explore all the Royal Membership benefits!

Our community:

Terms and conditions -
Privacy Policy -

What’s New

Version 2.0.9

- fixed custom skins
- fixed mute/unmute
- fixed replays
- bug fixes

Ratings and Reviews

4.5 out of 5
11.3K Ratings

11.3K Ratings

Best .io cell game ,

Noob gamemode

Hi, I gave this app 5 stars because I know it has a lot of potential. I was just wondering if you could make a new game mode with just a single player and bots. So that if the player is new at a .io cell game, they can practice with bots. There could also be a difficulty changer and you can chose if you want to play with bots on different game modes, such as, Bots with Instant Merge. Or Bots on Crazy mode. Stuff like that. I hope you read this and please do reply, I am sorry if I don't reply but I will try my best to find my review every day to check if you replied. Have a great day, and thank you for making an awesome game. :).

Developer Response ,

Hello. Thank you for reply. Game mode with bots is in our future plans, but will be released not soon. You can practice in experimental game mode. Have a nice day too. Good luck. legend ,

Editor read pls

I have already made several reviews and all I ask now is for u to pls try and fix the fact that in bots unofficial mode my bot no longer splits. But it seems to just be me so far and I have tried almost everything I could to fix it but nothing works. So if u can could u please try to fix it

Oops I wrote this review a while ago and I must’ve accidentally sent it when the game asked me to give it a review. I’m not sure if it’s actually a problem anymore but I recently downloaded the game again and everything is working great!

Developer Response ,

Okay, we will look at this trouble. Thanks!

BJGrondell ,

Good game, but it has some issues

I love this game, I love the gamemodes! There are some problems. There are way too many ads, please reduce number of ads or have an option to remove ads. Needs more servers, too many people in each server. The ultra maps are way too small, I can't spawn in without dying instantly. Can you guys make it so we can play against bots in almost all gamemodes? If you do add an option to play with bots when will it be released? I want to see this game succeed, I love this game, please reply soon! :>

Developer Response ,

Hello all of things that your suggest will be released, but now we are working on Google login, because so many people haven't facebook accounts or have trouble with it. Thanks for reply. Have a nice day.

App Privacy

The developer, Mikhail Prysiazhniy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • Identifiers
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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