Surface Level (one of the 7 tools in iMetalBox) is now free! Take this chance to download!
Full retina display support for both iPhone 4 and iPhone 5!
Also check out iMetalBox: 7 in 1, get 6 more tools with the price of one!
You can use Surface Level for:
- Carpentry works
- Measure angles and slopes
- Home decoration
- And much more!
Calibrate instructions:
- To calibrate the levels, hold the phone against a reference surface and press the Calibrate button.
- Do this one time for the face-up orientation only.