When you create an App with Appy Pie the permissions within the app could vary between 2 and 20. Applications use a lot of permissions including those needed to access the SD card, use the Internet and so on. Google & Apple do a great job of displaying what permissions an app uses before installing.
Now while creating an app, you decide to use the One touch call so your users can call you that will mean Phone/ SMS permissions would need to be added to your app, similarly if you decide to add your office location to your app so that your clients can get turn by turn directions to your office, this will mean that location permissions would need to be added to your app and so on, the point we are trying to make here is that each feature within your app might needs specific permissions. To make the process simpler for our users, we have added a standard set of permissions on all apps so you are not at risk of getting your account suspended because of permission issues.
Update: Now Android gives you the ability to control your app permissions on Android 6.0 and up for details refer to https://support.google.com/googleplay/answer/6270602?hl=en