Jason, TYPO..... "three" should have be "there". Thats what happens when you have old eyes and try to do posts on a phone with small type.
It sounds like you have the same version I have. It has been too long since I messed with an Iphone.
On my Droid Razer:
Start the program up at the main page. Top of page will say "Select Weapon Profile". You will have a list of guns you have entered or came installed. On my phone there is a button at the bottom of the phone, (on the phone not the bullet flight screen) that has three parallel lines. That is what I am calling the "menu" button. When I touch that button a set of boxes pop up from the bottom of the screen; "New", "Modify", "Utilities", "Options". Press "Modify"; a box will pop up that asks "Edit" "Delete". Select "Edit". A screen will appear that will have boxes to enter sight height, click value, click unit and twist. It will also have a box that says "Ammo Profile". Under that it will say New, Edit, Delete. Select "Edit" and a screen will come up that allows you to input range, velocity, caliber, BC, mass, length, angle, temp, altitude, pressure, humidity.
One side note that I thought of while looking through all this. Don't forget to enter the proper measurement in "sight height". Some of the programs automatically populate that with 1.5". That is seldom correct and will mess up the solutions the program gives you. Even a 0.1 will matter. Most of my rifles have a sight height of 2.0 to 2.5", depending on the scope and rings. Use a scale a measure from the center of the bore or action to the center of the scope. I griped for years about my actual drops not matching up the the programs, much of the problem was not entering correct sight height data. For an experiment, put 1.5" in and run a chart out to 1000. Change that a 2.0" and you might be surprised at the difference.
Hope that helps with Bullet Flight. Maybe someone else with an Iphone can jump in here and answer your questions.