Looking for the Freelance app developer for notification systems in Houston? First you should check whether you have had a develop profile that has a permission to push remote notification.AlertHouston delivers critical information to Houston residents regarding current conditions, expected impacts, and protective actions. Appointment Booking: OIS facilitates the booking of VISA appointments on behalf of customers. In this tutorial, you'll learn how to configure your app to receive push notifications and to display them to your users or perform other tasks. Add Houston gem to your Gemfile: gem 'houston'. In this tutorial I will show you how to use notifications in your iOS apps and show the new features that iOS 10 introduces. Registering your app with APNs. Communicate with Apple Push Notification service (APNs) and receive a unique device token that identifies your app. Service Alert Collection Update.