Apple thinks this app is "sensational" (AppStore Selection, June 2015)
It's simple and it really works well (01Net TV)
Tuture is a completely automatic app (and without bluetooth use) that helps you find your car, scooter, bike, train, Space-X launcher ;-)… without doing anything.
Ideally, you should have an iPhone 5S or newer (6, 6+, 6S, 6S+, etc.) to benefit from automatic features, or if not, it may be possible to use the app with a manual location button.

Just launch the app and forget about it. When you need to know where you parked, just relaunch it to see the location of your car automatically and with no accessories.

The app will also alert you if it's cut off (phone restarting, discharged battery, etc.) by sending you a notification prompting you to click and relaunch it.

Two tabs are available to find your car. The map tab lets you know where your car is and where you are yourself, and the history tab gives you the history of your parking spots with parking times. You can also access the last parking place through this tab.

When launched, you'll be asked for your email (which you must confirm within 2 days), your make and model of car to optimize the position of your vehicle. You'll have to agree to the general conditions.

Here's a list of all the features:
. Automatic localization of the car when parked outside and localization of the parking lot entrance if the car is parked inside a parking structure.
. History of every time the car has been parked.
. Possibility to delete the history.
. Automatic alert if the app has been deactivated or suspended.
. Real-time counter of the type of travel detected.
. Possibility to manually pin a position.

Note: Continued use of GPS running in the background can dramatically decrease battery life. Tuture only get GPS data when you are inside a car.