I’ve always found that using Apple’s built-in “Find My” app is the simplest and most reliable way. Just sign in with her Apple ID on your device, and you’ll get real-time location, plus a timeline of where her phone’s been. If you want more detailed location history, some third-party apps like Life360 work well—what worked for me was setting it up together so both of us could see locations anytime. Just make sure her phone’s location services are turned on!