Here are the latest iPhone/iPod touch/iPod/iPad apps announced. You can find ’em at the Apple App Store (http://www.itunes.com/appstore/).

MultiEducator has announced JFK Historymaker 1.0 for iOS devices. It’s an US$3.99 encyclopedic, multimedia biography of President John F. Kennedy. Featuring 36 chronologically ordered chapters, there are 250 high resolution photographs, the full text of over 200 speeches, more than 60 pages of biographical information, and over 35 video clips. The reference app is fully searchable.

iHanWel has released BackDoctor 1.0 for iOS, a video instruction and exercise course to alleviate and prevent back pain. Developed by physicians and physiotherapists, the app includes a Beginner Program, Advanced Program, Speed Program, Cervical Spine Program, and Lumbar Column Program. It features a video demonstration of each exercise with optional timer function, three educational videos, an exercise calendar, and tips on specific problems. BackDoctor 1.0 for iPhone/iPod touch is $4.99, and BackDoctorHD 1.0 for iPad is $9.99.

James Hollender has introduce the free iCals Lite app for the iPhone, iPod touch and iPad. It’s based on the USDA National Nutrient Database for Standard Reference. It allows users to find out the calories in a large number of food servings.