I looked at several monitoring apps before choosing Flexispy for their ability to monitor many aspects of the target phone. The installation instructions were very straight forward and was accomplished quickly. I was quickly able to obtain necessary information on the target phone. I wish I had known about the different "rooted" requirements for the Androids, many of the features were unavailable without these settings, but I obtained enough information with the features available to still make the purchase cost effective. I enjoyed the GPS feature, but quickly learned that it uses cell phone towers to ping locations in rural areas, not a problem but a little confusing at first. I would recommend this service!