Reminders App is one of the most useful and underrated app on your iPhone and it comes installed on every iPhone. In this video, I’ll show you everything you need to know to use the reminders app.

You can invite someone to Signal using the "Invite Friends" menu in the app, which will send a text message or email.

You can forward a text message from your Android phone using most popular texting apps, like the Verizon Message+ app.