Your smartphone may not be rugged or waterproof like outdoor GPS devices but it can very well get you out of trouble and help you find your way. There are plenty of awesome GPS and maps apps available for hiking, camping, and other outdoor activities. The Trimble TopoCharger is a handy solution that brings a ton of useful topo maps to your phone and has a backup-battery also.
The TopoCharger case turns your iPhone into an outdoor GPS device. It includes a 1440 mAh battery to run your iPhone for longer. The case is designed for the iPhone 4, 4S, and 5. The maps are stored in a removable chip so you can order maps for your own state or get more when you need to without any issues. Android users get outdoor maps too.. The TopoCharger case sets you back $169.
Speaking of outdoor accessories for iPhone, the Vaavud wind meter happens to be a handy device to measure wind speed using your smartphone. It does not have any electric parts and is resistant to water, sand, dirt, and the elements. This iPhone wind meter has a wind range of 2 m/s to 25 m/s. It allows you to see live wind readings from other users. What’s not to like?