It would be helpful to have the Start Index parameter in the local storage aggregates as well. 

Right now it is only available for the server aggregates, meaning that if we want to implement the pagination functionality for local entities, we need to iterate through the list to make it work, which is not ideal.

The standard pattern for mobile is the OnScrollEnding action, but for a tablet focused app, that pattern may not be the best fit. For tablets, it's also common to use the table widget, which doesn't have the OnScrollEnding functionality enabled, making the pagination the best alternative.