https://play.google.com/store/apps/details?id=com.evite&hl=en_US&gl=US
Evite: Email & SMS Invitations - Apps on Google Play
sms invitationseviteemailappsgoogle
https://help.zoho.com/portal/en/kb/survey/launch/distribution/sms-distribution/articles/trigger-sms-invitations
Trigger SMS Invitations using Zoho Survey API
What are Trigger SMS Invitations? Triggers are events that cause a certain action to happen when a pre-defined event occurs. With Zoho Survey's SMS triggers,...
sms invitationszoho surveytriggerusingapi