# Unit Converter All Categories — Metric & Engineering Helper

> Metric & Engineering Helper (iPhone/iPad app by Vladislav Zhirnov.)

- Source: https://appshunter.io/ios/app/unit-converter-all-categories/id6747321259 (this page in markdown: same URL + `.md`)
- Developer: [Vladislav Zhirnov](https://appshunter.io/developer/1476188065)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 12 MB
- Languages: American English, Arabic, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 22 more
- Released: 2025-06-16
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/unit-converter-all-categories/id6747321259/reviews.md

## What is Unit Converter All Categories?

Universal Unit Converter is the ultimate all-in-one conversion tool for professionals, students, and everyday users. Whether you're solving homework problems, performing engineering calculations, or managing tasks in the lab or workshop, this app has everything you need in one beautifully organized interface.

With over 70 converters spread across 8 specialized categories, this app helps you convert almost anything — from simple length and weight to advanced thermal resistance, magnetism, radiation, and more.

Main Categories & Features
Common Converters
Quickly convert essential everyday values like:

Length
Weight and Mass
Volume
Temperature
Area
Pressure
Energy
Speed
Data Storage
Time, Power, Force, and more

Engineering Tools
Perfect for students and professionals in mechanical or civil engineering:

Angular velocity & acceleration
Density & specific volume
Moment of inertia
Torque & force moments

Heat and Thermal Systems
Handle all thermal analysis needs with:
Thermal conductivity
Specific heat capacity
Thermal resistance
Heat transfer coefficient
Fuel efficiency (mass & volume)

Fluid Dynamics
Explore various physical and chemical properties in:
Flow rates (volume, mass, molar)
Viscosity (dynamic & kinematic)
Concentration & permeability
Surface tension

Light and Optics
Calculate optical parameters with:
Luminance
Illumination
Light frequency & wavelength
Digital image resolution

Electricity
Designed for electrical engineers and electronics enthusiasts:
Current, voltage, resistance
Capacitance & inductance
Conductance, conductivity, and resistivity
Electric field strength & charge density

Magnetism
Convert key magnetic quantities:
Magnetic field strength
Magnetic flux & flux density
Magnetomotive force

Radiology and Radiation
Medical and scientific users can convert:
Radiation exposure (Gy, Bq, C/kg)
Absorbed dose & activity

Why Choose Universal Unit Converter?
Clean and intuitive UI with categorized converters
Accurate conversion formulas used by professionals
Offline mode — No internet needed

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Full version / year | $2.99 | per year |
| Full version / monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove ADS | $4.99 | one-time |



## Version history (last 3 releases)

### 3 — 2025-08-26

dark mode fixed

### 2 — 2025-06-23

Added new localizations

### 1.0 — 2025-06-17

No release notes.

## Apps similar to Unit Converter All Categories

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Weicon - Weight Unit Converter](https://appshunter.io/ios/app/weicon-weight-unit-converter/id6743514217) | — | Free | Utilities |
| [Unit Converter & Currency](https://appshunter.io/ios/app/unit-converter-and-currency/id6479210637) | 5.0 (1) | Free | Utilities |
| [convrt-IT](https://appshunter.io/ios/app/convrt-it/id1544763367) | — | Free | Utilities |
| [Force Unit Converter](https://appshunter.io/ios/app/force-unit-converter/id1415262579) | 5.0 (3) | Free | Utilities |
| [Pressure Vessel Thickness](https://appshunter.io/ios/app/pressure-vessel-thickness/id1492098075) | — | $2.99 | Utilities |
| [CalcKit](https://appshunter.io/ios/app/calckit/id321006774) | — | Free | Utilities |

## More apps by Vladislav Zhirnov

- [Facefitness - face exercise](https://appshunter.io/ios/app/facefitness-face-exercise/id1476188216)
- [Neon Bleep Test PRO](https://appshunter.io/ios/app/neon-bleep-test-pro/id1487695486)
- [Ideas fast log](https://appshunter.io/ios/app/ideas-fast-log/id1491519557)
- [Concentrate and guess color](https://appshunter.io/ios/app/concentrate-and-guess-color/id1491661397)
- [Postage stamps: all countries](https://appshunter.io/ios/app/postage-stamps-all-countries/id1497958107)
- [Road signs: all countries](https://appshunter.io/ios/app/road-signs-all-countries/id1500810663)

All apps by Vladislav Zhirnov: https://appshunter.io/developer/1476188065

---

*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 2026-08-21.*