As I said in another post, a while ago I wrote an inhaler counter app for my own use. It's very simple, and runs on most Java-capable phones (as if you can run Java games) or Android.
Bear in mind that it's something I wrote for myself as a quick solution - it's not a commercial product and isn't supported as such. Nevertheless, I'm happy to answer any questions if you have trouble installing it.
I've got a blog post at frasermckay.co.uk/ with a link to the free download.
Hope this is of use to someone!