For more detail this asset from the Unity Asset Store: Click Here
This is a paid asset, but now you can download iOS Etcetera Plugin for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
iOS Etcetera Plugin v2.24
“If possible, please buy the package to support the developer”
Every feature that didn’t warrant it’s own plugin has a home here! The feature list is huge including: native alerts, localized strings, single and two field customized prompts, web view, mail composer, SMS composer, programmatic screenshots, native activity views, rate this app popup, photo/camera picker, image resizing, and push notifications (optionally with Urban Airship or Push.IO). Now with direct access to the shared iOS pasteboard allowing you to get/set data.
There is something in this plugin that will save development time and provide a polished experience for every game!