Before switching to Roistat, I tried all the alternatives, but in terms of price/functionality/support/integrations, this service is currently the best. There are indeed some challenges with integrations, but, as my experience has shown, this is more related to the developers of external services. Combined with the analytical tools of Yandex.Metrica and Google Analytics, we get a complete set of necessary functions. It works great with call tracking systems. Thanks to this tool, we were able to identify problematic and weak spots in the advertising we ordered from a third-party company, which ultimately led to the termination of the contract with them and allowed us to avoid further wasted expenses.