Advanced Ruler

Sep 23, 2015

v3.2 fixed a minor bug when showing the help. only on android versions 2.x.
v3.1 further tuning to the auto-calibration
v3.0 use a new way to auto-calibrate the ruler
v2.2 fixed the crash in v2.1
v2.1 added phones, fixed the text size issue on larger screen phones
v2.0 support tablet resolution