[doggodaddo78]

That's called a web browser and a web app.

And then there wouldn't be anything to hog-up 1/3 of a GiB on every customer's phone, and it would always be up-to-date. Just don't ever lose internet access.

[amelius]

How do you expect to hail a taxi when you don't have internet access in the first place?

Does the app use SMS when the internet connection is lost?

[depressedpanda]

Web apps can be cached and run entirely offline.

https://en.m.wikipedia.org/wiki/Progressive_web_application#...

[ohiovr]

Especially getting lost in a cell dead zone.

Its not exactly a web app but it could be made that way with WebRTC.