CRM with built in Sales Funnel Capabilities – B2C

Hey Everyone,

I'm looking for suggestions for a cost effective CRM with this functionality. It is for a mobile app that is on the site, App Store and Play Store for B2C.

• CRM with Sales Funnel Capabilities
• Track users as they sign up for a 7 day free trial as a lead
• Track users after they sign up convert to contact or client
• Have form connectors
• SMS Marketing
• Sequences, Campagins
• Integration – Native or Zapier

The challenge is that our current build on the App Store and Playstore is revision 1 and has to stay that way with all regions it is already authorized for so how would you suggest the most native way to connect the API?