Back when I carried around a Palm Pilot, Tricorder was a humorous diversion that didn't do much more than proudly proclaim to those around me: "This guy's a complete nerd." Oh, and it kept my kid amused when we waited in Doctor's offices, and such. Ah, but Android phones do so much more than PDAs ever dreamed of! They have actual sensors built into them. So it's only natural that Tricorder became something more than a gimmick. It's an actual utility. Scan for Wifi signals. Detect magnetic north. Measure decibel levels (like when the kids are running around screaming). Measure g-forces (Mythbusters, take note...). Determine which way is up (useful for instances where you've had too much Romulan Ale). Measure cell tower signal strength. Look at the sun without burning your corneas.(via SOHO images from the internet) Pick up Orion Slave Girls and take them back to your base- okay, I made that last one up. Tricorder does it all. Just like James T. Kirk- back when Star Trek was about kicking *ss and not talking people to death. This amazing program is right out of the 24th Century, because it's FREE. And it runs a paltry 547kb. Now if only someone would write a "Phaser" app that would turn my Android into a non-lethal stun gun. That would be something.