When I first heard of bMagnified I was a bit skeptical. Most of what it claims to do is something you could do free with the camera app by zooming in. I actually ran into one of our older readers, Gabe, and he told me he is in love with the app which made me reconsider. bMagnified makes it super easy on your BlackBerry 7 device to magnify using the camera view though it does work better on Torch, Bold, and Curve models with AutoFocus since the 9900 fixed focus camera will be blurry.
You can find bMagnified in App World for $0.99. I am guessing that it is limited to OS 7.0+ due to API requirements.