Hi
I am a full stack developer based in Singapore with rich experience in mobile app development using different tech stacks like backend: nodejs, adonisjs, python djano front-end: reactjs, angularjs mobile: android native (Java & kotlin), iOS (Objective-C & Swift), flutter, react-native.
Based on your requirements, I can look into existing mobile app source code and can alter timetable logic to load pdf file and also make it downloadable.
I am available to start immediately. Please share more information to start with.