I am looking for your tips and advices regarding the presonalized notifications based on local conditions.
I have an app where customer can perform a search for product or service and i would like to store that string in order to perform periodicaly search for it and when product is found to send that customer back a notification (push or local?) that product is available.
I assume that i need database to store those text strings and notification service. ...But how to connect those two?
Any ideas what to use? Mixpanel or Onesignal + Firebase or my own server MySQL or mongoDB?
What is the bast solution to achieve this?