So I am now the owner of a copy of Quartermaster. I highly suggest that if you purchase the app that you go to their site and give the User Guide a quick read just to avoid any confusion, being in IT, I expected some confusion and after a couple of minutes I decided my life was difficult enough that I would just go read up. Quartermaster appears to be a full-fledged army builder, of course you can build army list and it does a good job of keeping your list legal. I double checked a couple of my builds against the codices just to be sure and they were correct. You can also build templates and share them out so others can use them. Speaking of templates you will need to download them and the User Guide does a good job of telling you how. The templates are user created and the site that was listed has most everything you will need. The couple I looked over seemed to be correct and up to date, those that aren't have the release date of the file clearly listed on the site. The App allows you to publish your army list to the app for viewing, to most of the document viewers on my iPad and to email, if I missed something under publishing I probably wouldn't have used it anyways (sorry).
I can honestly say that of the tablet based army list builders, both free and purchased, quartermaster is the only one I feel was worth the price. I am not saying that I have tried every one out there but after only a couple of minutes and a glance through of the User Guide I was very comfortable with the app. If anyone is interested I linked their website below.