Nimble N5 Pet Temp Monitor

This isn't just another one of those generic dog-fitness dog-activity dog-geo trackers. This app lets you monitor the temperature inside the car where your dog is, which is way more important than, well, other apps designed to make money off dog people without actually understanding their needs.

But I digress :-)

Firstly, you should never leave your dog unattended in a warm car.

This app sensor monitors temperature in the vehicle and sends you text and email alerts via cellular on Android and iOs devices. It also has GPS.