Mobile apps that work offline as well as online present an interesting set of challenges. Use immutable data structures, historical models, MVVM, and pub/sub to build apps that help people work and play together.
Rich, compelling mobile applications bring users closer to their data. They respond quickly, even if the network connection is slow or unavailable. They help users to collaborate with one another: a change made on one device by one user is automatically visible on other devices. And when something goes wrong, they help the user recognize the problem and correct it. Your users expect more from their mobile apps; build one that they will love.
Mathematician and software developer, Michael L Perry applies formal proof to creating reliable software. He has developed a method starting from the works of the greats (Meyer, Rumbaugh, Knuth), and embodied it in his open-source frameworks (Update Controls and Correspondence).