How do you figure that? I get less than 1 degree of accuracy using this method.
With a tablet that is over 5 years old.
The internal gyro, works quite well.
It is VERY easy. Just take a small (1" x 2") piece of plexiglass, or clear plastic.
Tape it to the back side of the tablet/phone, towards top.
Put some crosshairs on the plastic.
Using something you can see clearly, example Jupiter, get it in the crosshairs. Using basic math, or even better just get a level (nevermind this)
Even easier is the house method, same concept. Basic math, or better use a 0.59 cent protractor. The peak of the house works best, but you can also just go to a side of the house. You will need to know what degrees Polaris is from your position (there are plenty of websites for this) Looking straight on, side of house towards north, using protractor as guide.
Example, where I live I know Polaris is 42.5 degrees in the sky. (might be 32.5 have not needed to look up that figure in a long time). This is only to see if you can even see Polaris, from your position, or are actual mountains in the way?????
If mountains are in your way, The magnetic north and a cheap compass as poster stated, would be a easy way (but not accurate also, however within 2~Degrees of where you need to be). Assuming you have a goto mount that works correctly, it would still be enough to get you in the ballpark.
The app, is VERY accurate, but I have found with my older tablet, I have to spin around 360 a few times, until Jupiter, or whatever I am looking at, gets in the crosshairs. If you have never used the app, I certainly would not knock it. And this is the free version I am talking about. I have used it about a half dozen times, and whatever I am looking for is always on target, with me looking straight at screen, and object just above screen (in exact place every time).