I would be glad to work with the developer on this. The app constantly signs you out and has some annoying bugs. It needs to be more polished. The time is now as Marriott and Starwood merging will mean the Marriott app will likely benefit. If this app strengthens then Hyatt can begin to pull value from other members top tier clients like myself (Starwood and Marriott top tier member moving to Hyatt).
TxCrocodile about World of Hyatt, v2.7