Dumpy Pro.

Dumpy Pro — Digital Level Book The level book that belongs on every surveyor's phone. Record, check, and export your field data without paper, without a laptop, and without losing anything. LEVEL BOOK Work exactly as you would on paper — but faster. Enter your Backsight, Intermediate Sights, and Foresight readings using the Height of Collimation method. Every HC and RL is calculated instantly as you type. A live closure check at the end of each run tells you whether your arithmetic passes in s