der Tracker
Translation
tracker, tracking device
Examples
Der GPS-Tracker zeigt den Standort des Autos.
The GPS tracker shows the car's location.
Viele nutzen einen Fitness-Tracker am Handgelenk.
Many people use a fitness tracker on their wrist.
Grammar Patterns
((a tracker)) ((for sth.)) a tracker for sth. A tracker for fitness is useful.
Similar Words
Verfolger (pursuer), Ortungsgerät (locating device)
Etymology
From the English verb 'to track'.
Memory Tips
It's a direct loanword from English, so just think of a fitness tracker or a GPS tracker.