This would be a bad approach, because you are essentially trying to brute force your way around a roadblock (no supported open data format) the supermarket intentionally designed. It would be easy for them to block your bot with Captchas, rate limits or IP blocking or just sue you.
That won’t solve the software side. My previous phone was still working, but then Google fucked up the software. The first because it required some new ssl standard for all connections that the phone didn’t support. The other one because google added a whole lot of local Infos, pictures and features to the map that could not be disabled, therefore rendering my Navi to a unresponsive, slow and battery draining app I could no longer use. And then there where some apps that would not run because my os was to old.