Contact Us
Email us at sylviahenry1936@gmail.com and we'll get back to you within 48 hours.
How to Play
A crane carriage moves back and forth above your structure. Tap the screen to drop the slab. The part that overhangs is trimmed away. Land within 4 points of center for a True Seam bonus — your slab widens instead of narrowing.
The carriage speeds up as your structure grows taller. Keep your taps precise to maintain width.
Blueprints
Blueprints are precision challenges. The first two unlock immediately. Complete runs to unlock more. Each Blueprint has a specific goal — reach a height, land a seam streak, or keep your slab above a minimum width.
Erasing Progress
Go to Ledger → Erase Progress. You must type the word ERASE to confirm. This action cannot be undone.
Privacy
Plumbline is fully offline. No data is collected, no accounts required. Your progress stays entirely on your device. Read our Privacy Policy.