If you don't like to type on glass, you always have the option of adding a Bluetooth keyboard to your iPad, but that means adding bulk and weight to a machine whose chief attraction is its compact, lightweight design.
A silicon membrane, Touchfire, offers another option. It's a clear membrane that stretches over your iPad screen to add raised keys.
While the raised keys help touch typists orient their fingers, keep in mind these keys don't click like real ones; they just add a bit of feel.
But the Touchfire does have an advantage over a real keyboard. It is so slim that it can be left on your iPad underneath the cover, without interfering with the cover's magnetic closure.
If you choose, you can glue on some auxiliary magnets that come with the Touchfire, so that it can stick to the iPad's cover when not in use.
Because the Touchfire is a stretchy membrane, it doesn't line up perfectly with the iPad keys, although it does well enough. You may have to occasionally tug it back into place.
The Touchfire costs $50. If you want to spend less money, there's the $35 TacType, which has a rigid frame to hold the keys in place more accurately.
Both have received mostly good reviews from users on Amazon.com, but people who expected a true keyboard experience were disappointed.
In the end, the decision may not be which membrane keyboard to buy, but whether what you really want is an actual keyboard, with its added weight and all.
This article originally appeared in The New York Times.