HomeAppsHealth & FitnessHalf Marathon Trainer 13.1 21KApps like Half Marathon Trainer 13.1 21K Here are some great alternatives to Half Marathon Trainer 13.1 21K by Zen Labs Fitness : Half Marathon Training Coach ★4.6 Half Marathon (21k / 13.1m) ★3.7 Couch 5k - Running App ★4.5 5K, Triathlon, Marathon Plans ★4.1 Nike Run Club - Running Coach ★4.0 San Francisco Marathon Tracker ★4.8 RunMotion Coach - Running ★4.2 ASICS Runkeeper - Run Tracker ★4.6 The Run Experience ★4.4 Coopah: The Run Coaching App ★5.0 Couch to 5K by RunDouble ★3.7 FitRunner - Running Coach ★4.4 Marathon Kids Connect ★3.7 Runna: Running Plans & Coach ★4.8 RunDay - run/walk coaching PT ★4.6 RUNNER-X ★4.1