Mi Heart rate with Smart Alarm - be fit Band is a lifestyle app that broadens the abilities of the Xiaomi Mi Band 1s Pulse, Mi Band 2, and Mi Band 3 pulsometer. It allows users to measure their heart rate continuously and establish their desired training result, advising them to increase or decrease the intensity to stay in the target heart rate zone. The app also includes a heart rate alarm that notifies users of high heart rate during workout and everyday life.

After the workout, users can check their heart rate data in a separate graph in the MiHR app, which helps them access the changes and draw useful conclusions for the following workouts. Additionally, the app measures users' heart rate at set frequencies (e.g., every 5 minutes) to decrease battery usage.

Mi HR users can export their heart rate data into the Google Fit app and synchronize their heart rate data with their favorite fitness trackers. The app also offers a free version with a 10-minute continuous heart rate measurement and a premium version that includes unlimited continuous heart rate measuring and a geo alarm feature.

Overall, Mi Heart rate with Smart Alarm - be fit Band is a useful app for fitness enthusiasts who want to track their heart rate and stay in their target heart rate zone during their workouts.