A doctor in your hand

Is there a doctor in the House?

Health-related apps for smart phones are coming of age. Here are some of the latest.

• One of the latest device-and-app creations to pass muster with the federal Food and Drug Administration is iBGStar, a blood glucose meter that attaches to iPhones or iPads for diabetes monitoring. It's a product of Bridgewater, N.J.-based Sanofi, and sells at Apple retail stores and Walgreens drugstores for about $100 and $75, respectively.

• Heart-EKG uses the iPhone's microphone or camera flash to calculate users' average number of heartbeats per minute or to take their pulse, after placing the phone over an artery, and activating the app. Dallas-based Surich Technologies says the app is handy for aerobic workouts, but isn't intended as a lifesaving monitoring device. It's downloadable from iTunes, for $2.99.

• The iHealth Wireless Blood Pressure Wrist Monitor, expected on the market in September, measures users' blood pressure directly from their iPhone, iPad or iPod Touch. Its app records systolic/diastolic numbers, heart rate and pulse wave, and can chart blood pressure readings, says Karyn Anderson, spokeswoman for Mountain View, Calif.-based iHealth Lab.

• AliveCor Heart Monitor has developed an electrode-studded cellphone case that turns the iPhone 4 into an electrocardiogram device that users hold in their hands or place on their chests to detect irregular heart rhythms. Combined with the app, the monitor can analyze, transmit and store an ECG reading for diagnosis. The heart monitor has been through several clinical trials, said physician David Albert, the device's inventor and co-founder of San Francisco-based AliveCor. He hopes to introduce it for veterinarians' use for dogs, cats and horses later this summer. The device doesn't yet have FDA approval.

• A cellphone-based E. coli sensor for water and other fluids is under development by a University of California-Los Angeles research team. Commercial manufacture of the system, which uses a lightweight attachment to the phone's camera, could be only two years away, said team leader Aydogan Ozcan, a UCLA associate professor for electrical engineering.

• San Francisco-based CellScope's otoscope attaches to the phone's camera lens and will enable parents to photograph their child's eardrum, and e-mail the images to medical professionals checking for an ear infection. CEO Erik Douglas says he hopes to get this to market in about a year.