Some great reasons to buy DM calculators DM calculators ...

Why DM calculators are better than cell phone apps
The moral of the story It is unwise to pay too much but it's worse to pay too little.
When you pay too much you lose a little money. That's all.
When you pay too little, you sometimes lose everything. Because the thing you bought was incapable of doing the thing it was bought to do.

Some people say you have to be a little crazy to buy an RPN calculator. Well, in that craziness we see genius and that's who we make the world's smallest programmable RPN calculators ever for.