MEDICAL iPHONE APPS

Here are some medical related iPhone apps that you may want to consider using.  Don't forget to investigate before you purchase.

* JetLag RX. You input your travel destination, your usual bedtime and so on. The app recommends a schedule for eating, sleeping and exposure to light in order to land in the new time zone with a minimum of jet lag, based on modern jet-lag research. (Not yet available in the iTunes app store; $10)

* Uhear. Clever, self-administered test for hearing loss. (Free)

* SoundAMP. Turns the iPhone into a hearing aid. Amplifies and processes voices to make them clearer. Even has a 30-second replay button that can save you from having to say "What?" so often. ($9.99)

* ProLoQuo2Go. It's a speech synthesizer for patients who have trouble speaking; you tap big fat icons to put sentences together. You can also save common phrases into a special Quick Set. For an app, the price is shockingly high. But its competition is an $8,000 PC-based system that's decidedly not mobile. ($190)

* Period Tracker, Period Tracker Companion. The title says it all. This little app helps women predict the onset of each month's period, and wirelessly syncs with the man's app (Companion) so that he can know exactly when "to be a little extra nice and special." (Lite version, free; Companion, $1)

* Lose It! This beautifully designed weight-loss app has an astounding number of followers, if the outpouring of enthusiasm on Twitter is any indication. You tap to record everything you eat. It's actually kind of fun, because the program contains every food item you can imagine, including brand-name packaged food and restaurant-chain menus. For each one, the app lists the complete nutritional information.

You also indicate what exercise you get each day, using a similarly complete list of activities. Finally, you tap in your weight each day. Probably because the app focuses you so well on staying true to your goals, its fans say it truly works. (Free)

* Eyeglasses. As an over-40-year-old, I've become addicted to this app. It simply turns the iPhone 3GS into a magnifying glass. Hold it in front of some tiny type--on a menu, a receipt, a ticket, a medicine bottle--and Eyeglasses, after a moment of autofocusing, shows you a magnified version of it on the screen. Keeping your hand steady is tough, and the 6X and 8X images sort of fall apart--but the 2X and 4X views have saved me more than once. ($3)

* Retina. It's for color-blind people like me. You hold it in front of something--clothes in your closet, for example--and it tells you by name what color you're seeing. I love this one more for the concept than the execution; it says black is "too dark" and white is "too bright," for example, and it really needs more differentiation between various *degrees* of red or whatever. Tinted room light (of the sort that requires white-balance adjustments on a camera) can flummox it. But as an early example of an "augmented reality" app, it's very exciting. (Free)