Base on the requirement, I assume that a ionic hybrid application which could be exported android and ios would suffice.
I have recently delivered a hybrid application for a Church with cool features such as meeting schedules, task management, chat, file uploads etc. The tech stack as follows: Ionic 2, Angular 2, Firebase, Node, Stripe, Twilio.
Experience details:
I have got 10+ years of web and mobile application development. Expertise in design and development of enterprise applications. Worked in multiple domains: Healthcare, telecom, manufacturing, corgo, mining, construction. Some of the Fortune listed clients I have worked with: Dignity Health, Kiewit, Rio Tinto, Etisalat, Valmont, Cosco Marine Engineering.