SunWise UV Index helps you avoid dangerous exposure to ultraviolet rays by sharing each day’s projected UV level in your area. Just plug in your ZIP code. This free app from the federal Environmental Protection Agency will advise you what strength SPF you need. (Android, BlackBerry, and iOS)
Vision Test lets users run through five eye tests to help accurately assess vision strength, then helps locate nearby opticians. Just don’t use the app to skip regularly visiting a pro. (Free; Android and iOS)
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