Read this for App Explained

I do not work for nor am affiliated with this app developer.
It is a simple app that does one thing very well.
It allows you to compose long messages via you desktop then send them
to your cell where you have to push the send button.
Really, this is horrible? For an iphone?
You can buy the pro version for $4.99 where they dont attach an annoying
"sent by happy fingers" add on to your texts.
All in all a very clean (and the only way) to simply text long texts with an iphone from your
desk top that works.
I bought the pro and am using it "happily".

Not bobby Fischer about SMS PC HappyFingers : iPhone on your desktop