Text messaging or calling a number from companion app on phone

[aveniron]

I am trying to develop an app that can send a text message or call an emergency contact from the companion app using users phone based on a few triggers. I could not find any documentation or examples related to this topic. It would be great if I can get a few resources that can help me with this question or know if this is even possible in the Fitbit companion app or not.

[JonFitbit · Accepted solution]

You could only do this by calling a Web API from the companion. You could use a service such as Nexmo.

https://developer.nexmo.com/messaging/sms/overview

[aveniron]

I might be asking a very dumb question here. I thought Fitbit app can allow a companion app to place calls or send text messages on the user's behalf.  Does Fitbit app does not have an API to access devices' built-in Messaging API? 

Thank you so much in advance. These answers help me build my first Fitbit app.

[JonFitbit]

No, there's nothing like that in the Companion API.

[EmTe]

Also worth realizing that automatically calling a number or sending an SMS message is not possible at all for iPhone users. The iPhone is more locked down than Android phones.