It is an application that measures "laying down" by pressing a smartphone against the glass of a pachinko machine.
It's an application that measures angles with a common smartphone and specializes only in "pachinko laying down".
The "laying down" of a pachinko machine is as important as the "nails". Even if the nails are loose, they will not turn at all if they are not laid down. Since amateurs are fooled into saying, "This stand is crazy," there are even pachinko parlors that control the ball output by just laying it down without adjusting the nails.
The measurement accuracy depends on the performance of the accelerometer of the smartphone.
I don't know which model has the highest performance, but it feels like I've tried it quickly. The cheap catalog specs are almost disappointing.
If you install a smartphone ring sold at a 100-yen shop, it will make progress.