The Machinist APPrentice is a low cost introduction app focusing on some of the more basic calculations used with various processes in a Machine Shop.
There are calculations for:
Main Menu Screenshot
SFM to RPM
RPM to SFM
SFM & FPT to RPM & IPM
SFM & FPT to RPM & IPR
Helix Angle for Threading
Thread Reference Point
Tap Feed
Tap Drill Diameter, Inch & Metric, Cut & Tap
Drill Point Length
Several Conversions
Milling Menu and Example of Layout with Numbers
Turning Menu and Example of Layout with Numbers
Various Other Screenshots