HTC One X — I am in need of a very simple inventory app... Help?

Thanks for reading my post,

I am a copier tech and keep up with a whole lot of parts. My company's inventory system (people involved I think...) is not accurate.

I am looking for an app that will allow me to very quickly scan an item in, or scan an item out. (In other words.. two options, item in: scan: click ok: increment item by one, or the opposite.)

I'm to the point of learning app development... Sheesh.