The official guide for World of Pets:

Explore, hatch, and raise your very own pets!

• Meet, play, and trade with friends and other players.
• Play the pet mini-game and earn rewards for the best pets.
• Take on quests and discover the story of this fun RPG adventure game.
• Customize your character and your pets.
• Collect and level up unique pets and customize them with funky skins and accessories!
• Discover new lands and new pets!
• Discover secret areas and discover hidden secrets!
• Complete quests and play with friends and other players.
• Play multiplayer mini-games and compete with other players.
• Have fun, meet new friends, and play this amazing adventure game.

World of Pets is an online game, it's free, and you can play it on your mobile device.