So far I saw, AppSheet got a lot of opportunities, but it overlooked a lot of important issues such as syncing time, multiuser applicability, record refreshment lag, not possible to declare a number type as unique ID, limited data handling capability. I am scared, whether the future of appsheet wouldn’t be like msaccess. Because ms access also had a lot of advanced tools during that time but in terms of multi-user and online accessibility it was worse. I wish AppSheet should give focus on those issue. Actually I can provide a long list of issues with appsheet. Anyway, wish AppSheet all the best.