Gammatochi Egg Game
This game is for the ios and android devices. When the player downloads the app they are given an egg to look after, if the player looks after the egg it will soon hatch into a small creature of some sort. The type of creature depends on the average temperature the phone was at while in the egg. The software will use the phones thermometer to figure this out. If it was quite cold the creature will be for likely to grow fur and be more acclimated to cold areas, while if is hot scaly skin is more likely to from as it evolves.
Similar to the old Tammagotchi games the player must care for his pets needs to watch it grow up. Along with the basic playing things like playing games with your pet and feeding it, its evolution will also depend on where you are located in the world though gps and the temperature of where you live/go. It will also use the phones gyroscope/pedometer to judge how active the pet is. These things will also affect the pets personality. If you don't exercise with your pet if will grow lazy and become angry when you take your phone places (there also moving it). There will heaps more of these sort of interactions.
Eventually your pet will reach max evolution (or die) and will lay an egg so you can start again.
Image Source: https://talesofadequacy.wordpress.com/2013/04/03/i-am-curious-gene/