CNC Tools is a free application for the CNC technology.
Calculation:
Cutting data about milling, turning, drilling
Thread information:
METRIC (FINE/COAST), UNC, UNF
Engraving [*]:
CNC Engraving with output for the most CNC Controls*(FANUC, SIEMENS, Okuma, Haas, DMG, ..)
[*]
CNC TOOLS+ supports more functions.
The display and operation is optimized for "smartphones".