>> You can confirm this by looking closely at other apps in your class to see if there really is a scenario where you could get eg 4 digits of downloads in one day.

I am not sure how you could confirm this since Apple doesn't publish the number of downloads that an App gets in a day for a particular app or set of apps.

>> I also think it's a weakness that it's not available outside iOS as it would be very hard for any company to standardise around you vs something all their drivers can use.

It is also available on Android.

>> It may also be a drawback that drivers have to pay for you themselves, or are companies able to pay subscriptions for them?

Yeah, I am planning on making more of an offering for companies, however, in initial research it has been very difficult to 1) Find companies that need to do mileage tracking and 2) Find the right person to talk to and (3) actually sell them on a package.