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Anti Mosquito

This sounds farfetched, but it’s gotten some positive wordof-mouth — an app that sends out an ultrasonic tone that repels mosquitos. It will even adjust the pitch so that you can drive away whichever species is local to today’s port of call. picobrothers.com

Wolfram Sun Exposure Reference App

How long can you lie out in the sun until you start to burn? Install this app, and your phone will know. It takes into account your skin type, your sun block’s effectiveness, and local weather conditions to determine your optimum tanning time. It’ll also provide SPF recommendations, a 5- day UV forecast, and the local time for sunrise and sunset. products. wolframalpha.com/referenceapps