The Forerunner 645 Music is a fitness tracker specialized in running made by Garmin. The Forerunner 645 has rapid connected GPS, tracking capabilities for many cardio activities such as running, cycling, or swimming, as well as strength training. The screen is colorful and customizable, so the watch can be worn daily between exercises. And the best part? If you’re a music lover, you can store up to 500 songs on it or stream directly from Spotify using the watch.