Hi Scott,
thanks for the input. We considered a scheduler at some stage - where you can basically pick a date/ time plus an amount of hours.
We then threw that idea away basically because the assumption was that on-demand will be used with RTK in 95% of all cases (that was the assumption). RTK requires an online connection - therefore the scheduler would only add complexity without benefit.
Plus it may be painful if you book a session and got stuck somewhere (traffic jam, other customer calling etc - the default things that happen when you want to get something done).
Your counting approach is hard to realize on a mobile device - so a counter you can 'trust' is not easy in this context.
I'll still put this request back into the backlog so its on the radar - we may have options here in the future.
Nico