Eely.IO is described as 'There are EELY's out there in the ocean, to challenge you and to stop you in the way. If you get hit by another EELY, you go bust. But if you hit them with your tongue, they vanish'. There are more than 50 alternatives to Eely.IO for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Android Tablet. The best alternative is Agar.io, which is free. Other great apps like Eely.IO are Slither.io (Freemium), Osmos (Paid), Thrive (Free, Open Source) and Diep.io (Free).