Stridalizer
TECH SPECS 
DescriptionThese sensor-packed insoles tell you exactly what’s going on with your runs. If you carry your phone, you can access real-time tracking, stress-maps and alerts during your run. Or, leave your phone behind, sync your data and review your running form and performance afterwards.
BatteryUp to 20 hours battery life
RechargeableYes
Water resistanceSplashproof
SensorsPassive piezoeletric sensors
Sensors on both feetYes
Other
FUNCTIONS 
Activity trackingDistance, pace, calories, steps. The app shows you a stress map, or the pressure experienced on your feet and knees. This is important if you want to avoid injury.
Real time dataReal-time notifications on the stress experienced on your feet and knees, overpronation and overstriding. Should you overstride or overexert yourself too much during a run, the app will send out an immediate alert.
Other
LINKS 
View onAmazon
Amazon US rating
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