Well, I tried both Accurate Altimeter and Sensors Multitool, and I must say I'm disappointed. The values varied by 20 meters! In reality, my property varies by

Well, I tried both Accurate Altimeter and Sensors Multitool, and I must say I'm disappointed. The values varied by 20 meters! In reality, my property varies by 2 to 3 meters at most. I'll keep thinking about how to solve the problem.