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Local notifications allow your app to notify the user about content which does not require the use of a server.

Unlike remote notifications which are triggered from a server, local notifications are scheduled and triggered within an app. Notifications in general are targeted to increase user interaction with the app, inviting or tempting the user to open and interact with it.

UILocalNotification was deprecated in iOS 10. Use the UserNotifications framework instead.

The TRUNCATE statement deletes all data from a table. This is similar to DELETE with no filter, but, depending on the database software, has certain restrictions and optimizations.

iOS notifications are a simple and powerful way to send data in a loosely coupled way. That is, the sender of a notification doesn't have to care about who (if anyone) receives the notification, it just posts it out there to the rest of the app and it could be picked up by lots of things or nothing depending on your app's state.

Source : - HACKING with Swift

Devise is a very powerful gem, it allows you to sign up, sign in and sign out options just after installing. Moreover user can add authentications and restrictions to its applications. Devise also come with its own views, if user wants to use. A user can also customize sign up and sign in forms according to its need and requirement. It should be noted that Devise recommends that you implement your own login if you're new to rails.

Android Location APIs are used in a wide variety of apps for different purposes such as finding user location, notifying when a user has left a general area (Geofencing), and help interpret user activity (walking, running, driving, etc).

However, Android Location APIs are not the only means of acquiring user location. The following will give examples of how to use Android's LocationManager and other common location libraries.

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