181+ iOS apps curated and reviewed
Looking for free units converter for engineers apps? 16 of our 181+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 3.0★ (2) | No | Yes | May 2026 |
| 2 |  | Free | 5.0★ (3) | No | Yes | May 2026 |
| 3 |  | Free | 3.6★ (150) | Yes | Yes | Aug 2026 |
| 4 |  | Free | 4.7★ (2.3K) | No | Yes | Aug 2026 |
| 5 |  | Free | 4.3★ (83) | No | Yes | May 2026 |
| 6 |  | Free | 4.8★ (81K) | Yes | Yes | Aug 2026 |
| 7 |  | Free | 4.7★ (642) | Yes | Yes | Jul 2026 |
| 8 |  | Free | 4.8★ (191K) | Yes | Yes | Aug 2026 |
This tool allows professionals and students to convert units and currencies using dimensional analysis. It supports a vast number of unit combinations and includes physical constants. Currency rates are updated monthly.
This app provides a comprehensive unit conversion tool specifically designed for engineers, offering specialized units not found in standard converters. It features offline functionality, fast search, and a clean interface, replacing the need for multiple reference materials.
Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.
This app offers a comprehensive unit and currency converter with a vast array of categories and calculators for everyday needs. It allows users to customize templates, download shared ones, and provides automatic exchange rate updates for 167 world currencies.
This app offers a powerful and user-friendly way to convert units and currencies. It includes a built-in calculator, mass/mole fraction converter, thermocouple module, and physical constants database. Customize your display and input mathematical expressions for complex conversions.
Easily convert over 160 currencies and 350 physical units with real-time updates and offline capabilities. Create a favorites list for quick access to frequently used conversions and enjoy geo-based currency options. An ad-free version is available for purchase.
Easily convert over 700 units across 30 categories with this powerful tool. It offers a user-friendly interface, dark mode support, and a backspace key for quick corrections. Save time on all your measurement conversion needs.
Easily convert between a wide range of units across 20 categories, including length, weight, temperature, and more. Features live currency updates for 155 world currencies, refreshed daily. Designed for simplicity and visual appeal.
This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.
Easily convert between various units and currencies with a simple, intuitive interface. Features live currency updates for 155 world currencies, refreshed every 15 minutes. Optimized for a wide range of Apple devices, including iPads with Split View support.
Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.
This app offers a fast and user-friendly way to convert units and currencies. Customize your conversion lists and get instant results as you type, with support for over 350 units and 160 currencies. It also includes a built-in calculator and offline currency data.
A straightforward unit converter designed for ease of use and efficiency. It offers a wide range of conversion options without any advertisements, saving battery and data. All conversions are performed on a single, intuitive screen.
Easily convert between various units of measurement including length, weight, temperature, and currency. Features automatic currency updates, a vast selection of currencies, and customizable display options for accuracy and rounding. Optimized for multitasking on iPad and offers a beautiful dark design.
This app offers a comprehensive unit conversion experience with a vast database of over 1000 units across 50 categories. It supports mixed units, custom unit creation, and provides a unique, visually appealing interface for all your conversion needs.
This app offers a comprehensive unit conversion tool with over 971 units across 40 categories, including 173 currencies with real-time exchange rates. It features an intuitive interface, a scientific calculator, and offline functionality, making it ideal for precise conversions.
Easily convert between metric and imperial units for a wide range of measurements including area, speed, temperature, and weight. Supports scientific prefixes and offers a history of your conversions. No internet connection required.
Convert currencies and units quickly and efficiently on a single screen. This free version offers essential conversion tools with a built-in calculator and natural language search. Upgrade to the full version for expanded unit options and an ad-free experience.
Easily convert between a wide range of units for length, area, mass, temperature, volume, and more. This app offers a comprehensive set of conversion tools for everyday and professional use.
Effortlessly convert units with this intuitive and lightweight tool. Get real-time results for over 700 units across 30+ categories displayed simultaneously. Customize your conversion lists and access your history.