An older person addicted to using bunches of apps on his or her smart phone. Especially someone overly eager to share TMI about what apps they use.
An important distinction is the person doesn't just have the apps loaded on their phone, but uses them.
Dude: My grandpa tracks his diet, blood pressure, weight, exercise regimen, stock prices, medication schedule, all the family pictures, and tracks everyone's birthday with his smart phone, but doesn't have a single game on the darn thing.
Dudette: He sounds like a real appasaurus.
Dude: Yeah, but I can't complain too much. He just deposited $50 to my checking account, for my birthday, from his phone. Before he got the phone he never remembered my birthday.