I want to send pictures and messages to users phone numbers without making them install the app. I am using firebase for storage ( swift iOS) : <p>currently twilio.com offers a service where you can send messages and pictures through a phone number, I want to know is there any API or service that I can use to send my stored user data to their cell phone without making them install the app, I am not trying to Create a separate admin feature. </p>

<p>I don't want to create an admin feature,I want to see if I can send data to user phone-number without making them install the app.</p>
