Just in time for Black Friday, PopSci's new Tech Buyer's Guide iPhone app is available free in the App store. It's a portable version of the Tech Buyer's Guide here on the site, so it's packed with product recommendations and buying advice across 17 categories of tech, from netbooks to DSLRs to Blu-ray players. In addition, each product has a Price Check button, so you can tell instantly if the price you're looking at in a store really is the best one. It's the perfect shopping companion.
Download the app for free here [link opens iTunes].
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.