I think the Members Mobile App would be optimal when the following enhancements are implemented.
1. Add a Donations button
2. Add the Online Store
3. Give members the ability to see their payment and donation history
4. Give members the ability to see their purchase history from the Online Store
5 Give members the ability to print invoices, receipts
6. Give members the ability to see emails sent to them as well as the ability to delete them
7. Give Admin the ability to add specific page(s) from their website for viewing