When an app asks for permission, accept it with caution. However if you're using one of the underlying apps, I can promise you that I only access your photos to do limited actions on your behalf. I can also promise you that I only use the camera when you're expecting it. Contact information is only used in app when it's necessary. App permission is not an invitation to abuse user's privacy.
Downloading an app forfeits your rights to privacy. Most apps use your data to create a better app. At no point will any of my apps collect internal user data. In my apps you will remain anonymous, none of your app sessions are collected.