# Engineering Calculator MM — Threads, Tolerances & More

> Threads, Tolerances & More (iPhone/iPad app by Marcel Malovec.)

- Source: https://appshunter.io/ios/app/engineering-calculator-mm/id6829465138 (this page in markdown: same URL + `.md`)
- Developer: [Marcel Malovec](https://appshunter.io/developer/6825882827)
- Category: Productivity, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 10 MB
- Languages: American English, Czech, German (Germany), Hindi, Japanese, Polish, Russian, Chinese (Simplified, China), Slovak, European Spanish and 1 more
- Released: 2026-11-10
- Data updated: 2026-11-10

## What is Engineering Calculator MM?

Engineering Calculator MM is a tool for CNC programmers, machine operators, toolmakers and manufacturing engineers. Tolerances, threads, speeds and feeds, materials, machine elements, shop calculations, machine timers and attendance – all on your iPhone, clear and fully offline. It works even on a shop floor with no signal.

TOLERANCES AND FITS
• Holes and shafts to ISO 286 – fields A … Z and a … z, grades IT1 – IT18, sizes up to 500 mm
• Upper and lower limits, mean size and a clear drawing
• Clearance, interference and transition fits (e.g. H7/g6)
• ISO 2768 general tolerances
• Favourite fields (H7, h6 …) one tap away

THREADS
• Metric coarse and fine, UNC, UNF, UNEF, trapezoidal Tr and Pg conduit threads
• Pipe threads G, R/Rc/Rp, NPT and Whitworth BSW/BSF
• Internal and external dimensions, tolerance classes and recommended tap drill
• Thread turning: thread depth and final diameter X

SPEEDS, FEEDS AND TIME
• Turning, milling, end mills, drilling and tapping
• Cutting data by material group, limited to your machine's max RPM
• Metric and inch units

MATERIALS
• Material groups, equivalent designations and properties – just type C45, 1.4301 or 42CrMo4

MACHINE ELEMENTS
• Screws: clearance holes, counterbores, tap drills and tightening torques for classes 8.8, 10.9 and 12.9
• Hardness conversion HRC / HV / HB / tensile strength
• Parallel keys with keyway tolerances, retaining ring grooves and O-ring grooves
• Common G and M codes with search, for mills and lathes

SHOP CALCULATIONS
• Bolt circle with X/Y coordinates and a drawing
• Blank weight and material cost
• Theoretical turning roughness and the feed for a required Ra
• Tapers, sine bar and measuring threads over wires

A TIMER FOR EVERY MACHINE
• Any number of machines with your own name and icon (mill, lathe, wire EDM …)
• Set the warning before the end for each machine
• Rings at the end even when your iPhone is locked, with vibration
• 11 original tones and adjustable ringing time
• Running countdowns are visible on every screen

ATTENDANCE AND SHIFTS
• Clock-in and out, breaks, overtime and working-time fund
• Estimated gross pay from your hourly rate and bonuses
• Shift calendar including 4-crew operation and public holidays

TOOLS
• Calculator with history, angle functions and a triangle solver
• Notes in folders with numbering and bullets
• One search for everything: H7, 25H7, M10, G 1/2, C45 …

LOOK AND COMFORT
• 22 themes, 20 backgrounds, light and dark mode, adjustable corner rounding and text size
• Your own shortcuts on the home screen
• 11 languages: Slovak, Czech, English, German, Spanish, Polish, Ukrainian, Russian, Hindi, Japanese and Chinese
• Back up and restore your data to a file

PRIVACY
No ads, no sign-up and no tracking. All your data stays on your phone.

Note: calculated cutting data are a guide only. Real values depend on clamping, the tool, the machine and other factors.

## Is Engineering Calculator MM safe?

Not enough ratings yet to assess Engineering Calculator MM.

## Is Engineering Calculator MM legit?

Engineering Calculator MM has limited verification signals. The AppsHunter Legitimacy Score for Engineering Calculator MM is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 5.2 — 2026-11-10

No release notes.

## More apps by Marcel Malovec

- [Farár](https://appshunter.io/ios/app/farar/id6825882825)

All apps by Marcel Malovec: https://appshunter.io/developer/6825882827

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*