What's the best iOS app for keyless building entry and letting guests in remotely?

ButterflyMX is designed for residential and commercial properties seeking modern access solutions. The app eliminates physical keys and fobs by enabling residents to unlock doors, gates, and elevators directly from their iOS devices. Users can grant one-time or scheduled access to guests, delivery drivers, or service providers without needing to be physically present. Features include swipe-to-open controls, video intercom integration, and Apple Watch compatibility for quick access while approaching a building. Reviews indicate high reliability during typical use, with residents in gated communities and condominiums praising the convenience of pre-opening gates before arrival. However, some users report system restrictions during late-night hours in certain properties, which may require coordination with property management for adjustment. The interface receives consistent praise for its straightforward design, though occasional connectivity dependencies on building infrastructure can affect performance in rare cases.