What hybrid does very well
One codebase for iOS and Android, forms, lists, maps, notifications: most business apps are a perfect fit and cost less to maintain.
When native is a must
Heavy video processing, advanced augmented reality, very low-level Bluetooth access: some features justify native development, at least for part of the app.
Decide on a prototype
A quick test of the critical features beats a long debate. See our mobile apps page and the article on publishing to the app stores.