# MechRef
> Mechanical engineering reference & calculator for professionals.
Canonical page: [https://chrome-stats.com/d/com.hrsoftware.mechref](https://chrome-stats.com/d/com.hrsoftware.mechref)
## Overview
- **ID:** `com.hrsoftware.mechref`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** HRSoftware
- **Category:** TOOLS
- **Downloads:** 107
- **Version:** 1.0.3
- **Last updated:** 2026-08-16
- **First published:** 2026-07-07
- **Publisher country:** AR
- **Size:** 22 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.hrsoftware.mechref)
- **Website:** [https://hr-soft.github.io/mechref/](https://hr-soft.github.io/mechref/)
- **Privacy policy:** [https://hrsoftware.ar/mechref-privacy/](https://hrsoftware.ar/mechref-privacy/)
## Description
MechRef is a professional mechanical engineering reference and calculator app, inspired by the classic reference book "Máquinas" by A.L. Casillas.
Designed for engineers, technicians, and students who need fast, reliable calculations based on international standards.
FREE MODULES:
• Threads — ISO Coarse, ISO Fine, UNC, UNF with tap drill recommendations
• Fits & Tolerances — ISO 286-1 hole basis system with tolerance diagrams
• Converter & Constants — 180+ unit conversions across 14 disciplines, plus 65 engineering constants
• Areas & Volumes — 2D and 3D geometry calculations
• Geometry & Trigonometry — Triangle solver, arc & sector, trig functions, polygons
MECHREF PRO:
• Gears — Spur, helical, rack & pinion, bevel, ISO modules
• Springs — Compression, extension, torsion, leaf springs
• Shafts & Keys — Design by torque, bending, and keyway selection
• Belts & Chains — V-belt, flat belt, roller chain, timing belt
• Machining — Cutting speed, feed rate, MRR, and power calculations
• More Pro modules coming soon!
One-time purchase. No subscription. No ads.
Currently available in English and Spanish. More languages coming soon.
## Rankings
- #1,946,892 — Overall
## Permissions and access
### Permissions
- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_CUSTOM_AUDIENCE`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
- `com.hrsoftware.mechref.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
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Source: [Chrome-Stats](https://chrome-stats.com/d/com.hrsoftware.mechref)