http://www.androidheadlines.com/2015/11/sponsored-app-review-track-mobile-phone. html. https://www.techwibe.com/locator-android-app-trace-contacts. GPS tracker to track a cell phone of one or more contacts by phone number: The contacts must have installed the app, too. Through the app you can send requests for location sharing to defined contacts and groups. You can choose from your mobile contacts of the android address book - the groups from there where also read in by the app and can be used there. So you can track a cell phone of your friend, your family member, your colleague etc. The location tracking can also be disabled easily at every time - either for every single contact or for all contacts together. The app shows also, when a contact last used the app - when he was last online - and shows also the time when a location was last sended and the accuracy of a location. The process of track a cell phone is done through GPS or through another method choosen by you. Android also offers other, non-GPS-based methods which you can choose. Easily invite friends/family: Contacts/Friends/Family can easily be invited to download the Friend Locator/Family Locator-App. Possible ways to invite them are for example SMS, E-Mail etc. The more contacts have installed the app, the more possibilities there are to locate mobile of your contacts. Get notified when contacts arrive: You can create notification zones with location and radius and assign contacts to them. When one of the assigned contacts enters or leaves (you can choose) the zone, you will be notified accustically and visually by the app. So you do not have to wait long if a contact arrives late and are more flexible. Send emergency call in desperate situations: If you come into a desperate situation, for example if you have a accident or you get lost and nobody is near, you can fast and easily send an emergency call to selected contacts with the "Family and Friend Locator"-App that they can help you. Your location is included by the Phone Tracker in the emergency call so others can locate mobile of you - for examle by family members. The GPS Tracker-App also allows you to send the emergency call by SMS so that the receiver not even have to install the app to get informed - he only must own a cell phone. Chat-Function: The Friend Locator/Family Locator-App has also a chat function so you can there directly coordinate with your contacts. With the Phone Tracker you can chat with single contacts or with whole groups to coordinate meeting places and all the other things. No user account needed: To use the app you don`t need a user account like in many other app. You are indentified by your phone number. You must verify it when you first launch the app - but it goes all automatically, no further unnecessary account with username and password needed. The data of the app which goes over network will be encrypted though. So your privacy is protected best. Enjoy one of the best GPS Tracker and locate mobile of your friend or family member.