Smart Ruler
Smart Tools co.
Ruler
Xalpha Lab
Smart Ruler Pro
尺子, 卷尺:厘米,英寸 (Ruler)
NixGame
尺子 (Ruler App)
Nikola Kosev
尺子 Pro, Ruler
Smart Measure
Ruler (PFA)
SECUSO Research Group
Prime Ruler - 尺子, 相機長度測量
Grymala apps
Ruler+ (Donation)