The Hornady software I dont feel is hard to use or the text too small. For something free? It works pretty well and will generally get you on the target. From there you have to true up any data with any software like this. It offers plenty of flexibility, and you can enter anything you want for velocity, bullet BC, etc. All you can do is try it out. I run it on both my Android phone, and my iPad.
The only one I can think of that might be perfect out of the box would be the Applied Ballistics stuff with the custom drag models they have for each bullet, but thats not a free option by any means.