Approach & toolkit to prototype, develop & deploy this custom iOS app for personal use?

Approach & toolkit to prototype, develop & deploy this custom iOS app for personal use?

Context & Purpose:
I have had quite a many injuries/ accidents and my rehab has not been that great due to location & extensive travel. In order to pull things together using a Custom iOS app.

App Product & Features:
I am trying to develop a Custom app just for myself which will have the following:

• A list/ array or database of exercises - very specific workouts & rehab that have been gathered from various programs and sources & physiotherapist
• I'd want to be able to up/ down shift
  
  • Between easier & more difficult exercise variations
  • More & less sets/ reps
• Log the dates & timestamps with the 'data' of exercise, variation, sets & reps performed at the time, for tracking/ history
  
  • Best logged in format that's easy to export, analyze, graph using other apps/ or excel on PC
• Play the 'related' video file when needed if I can't remember exact 'form' of the exercise
  
  • Assume its an iOS compliant media format
  • Stored locally on iOS device in 'file share'
  • Name of file is mapped to exercises in list/ array or db

I read all of the below mentioned links, so I am Open to Suggestions:

• Should I maybe get a version of the dev tools and prototype / wire frame things and play with iOS API capabilities first?
  
  • Which toolkit & APIs would you recommend that I look at to start?
• Then approach one of the ways to following linked ways to deploy it through someone who has Apple Dev program access?
  

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