Hi! I'm implementing the Push Notifications in my first app and I would use OneSignal. I have some doubts: I must then create the following certificates? - Development: Apple Push Notification service SSL (Sandbox) - Production: Apple Push Notification service SSL (Sandbox & Production) Or only Production? OneSignal requires me: - Sandbox Push Certificate .p12 - Production Certificate .p12 When I go to create the certificate, I will appear "Creating a Certificate Signing Request (CSR)", I have in my Keychain 2 certificates previously created for Development and Distribution, I can use them or do I need to create from scratch because because must link only to 1 app? My first app is already on App Store, so Push Notifications is for build ad app update. In conclusion, you think OneSignal is a good service to the Push Notification? Is safe upload their certificates? Thanks!