Meet the Eachpal SmartUFO: a handy device that enables you to keep in touch with your kids, pets, and family members. It has a free iPhone and Android application that helps you do the tracking. The device relies on GPS + WiFi + GPRS 3-way positioning technology. You can attach it to any collar or belt to get started. The battery life is good for 9 days. The device is IP65 waterproof.
The Eachpal SmartUFO does not require you to pay any monthly fees. You will need a micro GSM SIM card to get the most out of it though. The device has an accuracy of up to 1-5 meters.