View detailed data usage/consumpotion on an iPad (running iOS 11 or later) I want to keep an eye on consumption of the 4 GB data available on a mobile data plan.

All I found thus far is consumption in GB, counting from a certain point in time (which one can easily reset) under Settings app.

What I'd like to see is:


A smaller unit then GB (MB's would be good).
Data consumption on a per day basis.


Is there any way to achieve this?
I'm not sure about iOS 11, but iOS 12 uses MB as the unit if the data consumption is under a GB.

With the cellular data counter in the built-in Settings app, you are limited to the statistics shown and the option to reset counter. There's no way to further breakdown on a day/week/month basis.

You can try searching on the App Store for 3rd-party data monitoring apps. Some service provider provide their own app which tracks data usage over a period of time. If available, it would be best to use it.