Hello, I have been searching for one of these and I cant find one! I wanted something simple and comparable to ATT Family Map or LIFE360. It has to be undetectable. Mspy, Flexispy, etc have great features but will hog too much data and throw up a red flag (I would pay if I could turn off all features except GPS!). Oh I almost forgot - both target and viewer has to be mobile based ( I can track using my cellphone) Any suggestions?