How can I test my vertical jump at home?

How can I test my vertical jump at home?

https://www.youtube.com/watch?v=pu5dYtr1gFE

How do I determine my vertical jump?

Measure the height of your standing mark. Measure the height of your highest jump. Subtract your standing height from your highest jump. This number is your vertical jump.

How do I measure my vertical jump on my phone?

https://www.youtube.com/watch?v=JnkqM1y40ak