*Not approved by the FAA*
Flight Panel is an app that has all the instruments a pilot might need. Which includes groundspeed, gyroscope, altitude, compass, and a G-Force sensor. This all combines to make a great tool for beginner pilots and more experienced pilots alike. Beginners can use it to get used to the instruments they will soon know like the back of their hand, and experienced pilots can use it as a second reference to their main instruments.
It is also useful to many other people than pilots. It will record your top speed as well as how much force you are experiencing.
**A device with GPS is recommended for precision accuracy required by pilots. A third party add on gps works great to. Without GPS the device will use inaccurate approximations, and there will be no altitude reading.