Of the dozens of bike mounts we’ve tested, the stem-bolt-utilizing Phone Booth is the most secure, weatherproof system we’ve found. You can get the case alone and use your phone with any number of great apps (MapMyRide, BikeBrain, and Strava, for instance) or buy the unit as an all-in-one bike computer that tracks speed, cadence, and heart rate ($330) and even power ($550).
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