If you think about it, many phone apps want access to most of your phone. Saves, GPS, chat, pics, speech, data transmission, etc. So it's not that surprising. These just aren't from "recognized" sources, so your phone balks.
Edit: Also, your phone takes any function that any app does and thinks it can potentially do those functions to any related item on your phone. The app wants to make saves? The app can make changes to your phone. The app wants to talk to it's host? The app can transmit any data from your phone. The app wants to know what your phone is capable of AND talks to it's host? The app can transmit all info about your phone and send any of that info to anyone.
None of this is false, either. Just most legitimate apps only transmit what they need to work and be improved. Still, your Chrome / Safari / Silk browsers probably transmit more data about you than any other app on your phone.