Dozens of Apps for Physical Education. In that post I highlighted the work that Kevin Shephard at Support REAL Teachers has done to develop apps through the free Glide service. Glide enables anyone who can create a Google Sheet to create a mobile app. You can start building an app from scratch or you can use one Glide's free templates to get started.
One of the templates that Glide offers is for building a staff directory app. The directory template can be used to include pictures of staff members, contact information, and brief bios of staff members.
You can find more Glide tutorials here.
Applications for Education
My first thought when seeing the directory template was to create a staff directory app that included not only the basic contact information for staff members but also where students and parents can find teachers' websites and supply/ materials lists. Depending upon the school you might also add teaching or course schedules to the directory app.