Needs major improvement

This was the most perfect medical/illness diary app I have found in close to four years. I could easily create a list of my pills, as I took a painkiller as needed I could select it, it would add a time stamp and go on "todays" date, same with my symptoms. I could add any of my personal symptoms and select them from the list as they occurred and it would be added to "today" on the calendar. Ive used this for over three years to take to my weekly doctor appts and could easily scroll through the calendar and read off things in order. Or, when I took a painkiller, I would know how long to wait to see if when it kicked in it worked or I needed another. OR before I had this, sometimes I forgot I took a pill, would take another and realize later (through a haze) that I doubled up by accident. This was never optimized for the iphone 5 but it functioned. Now it doesnt work at all on iphone 6 plus. So far Ive bought two similar apps only to find out they dont do what this app does at all. Im so upset. This program is irreplaceable and Im wondering how easy it would be to learn to create apps myself to duplicate this lifesaver.

Kat0711 about iHealthTrax (formerly Illness Tracker), v1.9