When you say "2 platform app" are you referring to a multi-sided platform? or specifically a 2 sided marketplace? Like Uber that has a driver and a passenger? If this is the case I recommend you reading about multisided platforms — https://www.amazon.com.br/Matchmakers-New-Economics-Multisided-Platforms/dp/1633691721. Once you read it I will be glad to talk with you with this VIP link https://clarity.fm/mgalli/crack806-multisided but keep in mind I am not an expert, just a leaner too that can offer some little help.