HomeAppsHealth & FitnessFrontier XApps like Frontier X Here are some great alternatives to Frontier X by Fourth Frontier Technologies Private Limited : Welltory: Heart Rate Monitor ★4.6 Heart Rate Monitor ★4.6 CardioX AI ★3.6 Heart Rate Monitor ★4.4 Heart Rate Monitor - HeartIn ★4.3 Bioheart ★4.6 Heart Rate Monitor ★4.0 Heart Rate Monitor BPM Tracker ★4.4 Heart Monitor: Measure BP & HR ★4.0 FITIV Pulse Heart Rate Monitor ★4.0 Heart Rate Pro - Health Track ★4.3 Cardio Training ★4.4 Heart Rate Monitor: BP Tracker ★4.4 CMF Watch ★3.4 MEDION Fitness Pro ★3.7 HR2VP Cycling & Bike Training ★3.3