
Engineers Tools
Nine workshop tools in one Android app.
Engineers Tools
Refractometer readings, mixing and top-ups.
Coolant Mix turns a refractometer Brix reading into concentration with your coolant's factor, works out fresh mixes and top-ups to bring a sump back to strength, and gives pH and tramp oil notes. Offline, no ads and no account. Coming soon to Google Play.
Want to know when it launches? Email forestforge.dev@gmail.com.



Nine workshop tools in one Android app.

Identify gears from teeth and OD, then cut the blank.

6000–6400 sizes and H7 seats.

BSP, NPT, JIC, ORFS, ORB and metric.

DIN, ANSI, BS 46 and Woodruff key seats.

ISO 286 hole and shaft limits.

Mass of plate, bar and section, with live scrap prices.

Bend, pattern, box, roll and develop.

Pitches, tap drills, compare and identify.

Starting amps, volts, wire and gas.

Ratios, belt lengths, centres and belt sections.

Chain sizes, sprocket PCD, links and centres.

GD&T and ISO GPS symbols in plain English.

Tightening torque and preload, metric and UNC/UNF.

HRC, HRB, HV, Brinell and Shore conversions.

Hardening and tempering for common steels.

Time jobs, cost them and quote, offline.

Sling angles, leg loads, WLL and shackles.

Measure a worn O-ring, find the size.

Leftover plate, bar and tube, and find a piece.

Offsets, mitres, copes and wrap templates.

Reverse rim and rim-and-face, with shims.

Guillotine force, punch tonnage and clearance.

Service log, hours, next due and reminders.

Measure a drawing at the machine when the office is out.

Gauge heights and slip gauge stacks for an angle.

Compression and extension spring rate and stress.

Ra, Rz, N grades, CLA and turned finish.

Morse, Jacobs, R8, 7:24 and metric tapers.

Throat, leg, weld metal and wire or rod.