There is a mobile app called Mobilescope that can monitor your phone to see what each app does and which one is leaking data. This is a service that you can access through their website. I do believe you need to sing up for this service. Here you can monitor the finding and check your apps that you've installed on your mobile device. You'll see if this app is dangerous or not. The app is detailed on the site and whenever an app sends out your personal information from your email account or other things on your phone it sends out an alert. This way the company can monitor all apps on mobile devices. Otherwise, on Android devices, you can monitor and check your app on your devices that are already installed. Go to your Manage Application Screen on your device. You'll need to tap on Setting and select Applications. Select any app from the list and open the app. Scroll down to see what permissions the app has on your device. You will see what the app can access and what personal data it can use or send out. You'll see all the warning signs and what the app can do. If the app has access to your email accounts, contacts, or other personal data, delete it immediately and remove it from your phone. Over 80 percent of all wallpaper apps have access to your personal data and send this information to a server in China. Apple is a bit pickier when it comes to apps than Android is. Most Android apps can easily access your personal information and send it out. it is best to check your apps and see what they can do.