# Calcubench: Engineering Calc — Unit converter

> Unit converter (iPhone/iPad app by JUAN MATIAS DEBARBORA.)

- Source: https://appshunter.io/ios/app/calcubench-engineering-calc/id6791974604 (this page in markdown: same URL + `.md`)
- Developer: [JUAN MATIAS DEBARBORA](https://appshunter.io/developer/6791974606)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 21 MB
- Languages: American English, European Spanish
- Released: 2026-08-02
- Data updated: 2026-10-01
- User reviews in markdown: https://appshunter.io/ios/app/calcubench-engineering-calc/id6791974604/reviews.md

## What is Calcubench?

Calcubench is a fast, offline toolkit built for engineers, technicians, and students who need reliable conversions and calculations without hunting through reference books or spreadsheets.

UNIT CONVERTER
Convert length, mass, force, pressure, energy, power, torque, area, volume, speed, angle, density, viscosity, and flow rate all offline, all instant.

FRACTION ↔ DECIMAL
Convert fractional inch measurements to decimal and back, with adjustable precision down to 1/64".

POWER ↔ TORQUE
Convert between power and torque at a given rotational speed.

MATERIAL & FLUID DATABASE
Built-in mechanical properties for common engineering materials and fluids—density, elastic modulus, shear modulus, yield and tensile strength, and viscosity—plus the ability to add your own custom materials.

PRO TOOLS
Unlock a full set of mechanical engineering calculators:
- Beam Deflection — rectangular, circular, tube, and I-beam profiles
- Torsion — angle of twist and shear stress for shafts
- Shear — maximum shear force and safety factor
- Fastener Calculator — torque, preload, and tensile stress area
- Pipe Flow Analysis — Reynolds number, pressure drop, and flow rate
- Weight Estimator
- Bolt & Torque Chart, Drill & Tap Size Chart, Structural Shapes reference

WORKS OFFLINE
No internet connection needed — every calculation runs on your device.

Available in English and Spanish, with metric and imperial units throughout and adjustable decimal precision.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Calcubench Pro | $6.99 | one-time |



## Version history (last 5 releases)

### 1.0.14 — 2026-09-22

• Redeemed a promo code? Pro now unlocks on its own, no need to tap Restore.
• New in Settings: send feedback straight to the developer, or rate the app.
• Restore Purchases now tells you when there's nothing to restore.

### 1.0.13 — 2026-09-13

New: Fatigue analysis (stress-life S-N, Goodman/Soderberg/Gerber) in Mechanical Calculations. Refreshed tool screens and a new app icon.

### 1.0.12 — 2026-09-03

• New Buckling calculator (Pro): Euler column buckling — critical load and stress, slenderness ratio, four end-condition cases with diagrams, and load eccentricity (secant formula).
• Redesigned Home screen: a faster two-column tool grid.
• 9 more alloys and stainless steels in the Material Database (22 total).
• Fixes and polish on the Buckling screen.

### 1.0.11 — 2026-08-24

Fixed a value/unit field misalignment on Deflection for single-dimension profiles (Circular solid/tube, simplified I-beam). Added a new Pro tool, Motor Speed (VFD): motor output speed under a variable-frequency drive at a different frequency, with an optional gearbox reduction stage. Made Bubble Level's calibration clearer, with an explanation of what it does and a status indicator for whether a reading is calibrated. Reorganized the Mechanical group into "Mechanical Calculations" and a new "Motors" group. Raised the minimum supported iOS version to 15.0.

### 1.0.10 — 2026-08-22

Fixed a metadata issue that was preventing the App Store from listing Spanish as a supported language, even though the app has always been fully translated into Spanish.

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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 2026-10-01.*