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Best Fast Temperature Converter Pro Apps

190+ iOS apps curated and reviewed

4.6 avg rating
15 free apps
Updated June 2026

Out of 190+ fast temperature converter pro apps on iOS, 15 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Fast Temperature Converter Pro

Convert Any Unit Lite#1

Convert Any Unit Lite by Cider Software LLC

Units & Currency Converter
Editor's Choice
✈️ Travel
4.7😊(47K ratings)
FreeAds
Convert Any Unit Lite screenshot 1
Convert Any Unit Lite screenshot 2
Convert Any Unit Lite screenshot 3
Convert Any Unit Lite screenshot 4
Convert Any Unit Lite screenshot 5

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.

What We Love

  • πŸ‘ Easy to use
  • πŸš€ Comprehensive unit conversions
  • πŸ’‘ Allows custom unit creation
  • πŸ”§ Useful for cooking, travel, and work

Room to Improve

  • πŸ” Too many unit options can be overwhelming
  • πŸ” Ads can be intrusive and disrupt usage
  • πŸ› Occasional bugs and freezing issues
Convert Any Unit#2

Convert Any Unit by Cider Software LLC

Units & Currency Converter
Strong Contender
✈️ Travel
4.8😊(5.1K ratings)
$9.99
Convert Any Unit screenshot 1
Convert Any Unit screenshot 2
Convert Any Unit screenshot 3
Convert Any Unit screenshot 4
Convert Any Unit screenshot 5

This app offers a fast and intuitive way to convert between thousands of units and currencies. Simply type to search and select units, with automatic category detection and intelligent suggestions. It includes advanced features like a built-in calculator and bookmark organization.

What We Love

  • ⭐ Excellent unit conversion capabilities
  • πŸ‘ User-friendly interface
  • πŸš€ Fast and responsive
  • πŸ’° Worth the paid upgrade

Room to Improve

  • πŸ” Lack of iCloud sync for bookmarks and settings
  • πŸ’€ Too many ads in free version
Unit Converter: Mila's Tools#3

Unit Converter: Mila's Tools by Scott DeSapio

Metric Conversion Calculator +
Worth Considering
πŸ”§ Utilities
4.8😊(1.4K ratings)
FreeAdsIn-App Purchases
Unit Converter: Mila's Tools screenshot 1
Unit Converter: Mila's Tools screenshot 2
Unit Converter: Mila's Tools screenshot 3
Unit Converter: Mila's Tools screenshot 4
Unit Converter: Mila's Tools screenshot 5
Unit Converter: Mila's Tools screenshot 6

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

What We Love

  • πŸ‘ Easy to use
  • πŸš€ Quick and accurate conversions
  • πŸ’‘ Comprehensive list of units
  • πŸ” Convenient for everyday use

Room to Improve

  • πŸ› Scrolling issues on newer devices
  • πŸ” Limited customization options
  • πŸ’° Desire for free version to remain free

More Fast Temperature Converter Pro apps to explore

4
Mila's Unit Converter PRO
Mila's Unit Converter PRO
Mila's Unit Converter PRO
Ultimate conversion calculator
$9.99
$29.99 | 67% OFF

Effortlessly convert between hundreds of units across 26 essential categories with this precision calculator. Designed for speed and simplicity, it offers accurate results in seconds for students, professionals, and travelers alike. Enjoy offline functionality and a customizable experience.

Hundreds of units across 26 categoriesMetric, imperial, and specialized unitsSmart conversions for temperature, fuel, and more
πŸ”§ Utilities
(842)
paid
5
Temperature Converter
Temperature Converter
Temperature Converter
Celsius Fahrenheit Kelvin
Free

Easily convert temperatures between Celsius, Fahrenheit, and Kelvin with a clean and intuitive interface. This utility app offers quick and accurate conversions for everyday use. Ads are present but can be removed via a one-time purchase.

Celsius conversionFahrenheit conversionKelvin conversion
πŸ”§ Utilities
(6.3K)
free with in-app purchases
6
Quick Converter Pro
Quick Converter Pro
Quick Converter Pro
Unit & Currencies Converter
Free

This free utility app provides hundreds of conversion units across various categories, including currency and digital currencies with live market rates. It offers instant results with a simple interface, making it a comprehensive tool for everyday conversions.

Hundreds of conversion units180+ currencies supportedDigital currency conversion (Bitcoin, Doge)
πŸ”§ Utilities
(19)
ad-supported
7
Simple Temperature Converter
Simple Temperature Converter
Simple Temperature Converter
Quick C to F Conversion
$0.99

Easily convert temperatures between Celsius and Fahrenheit with a simple sliding interface. This app offers a quick and intuitive way to switch units without typing, with customizable temperature ranges. It's designed for users who frequently need to check temperatures in different scales.

Sliding conversion interfaceCelsius to Fahrenheit conversionFahrenheit to Celsius conversion
πŸ”§ Utilities
(4)
paid
8
Fancy Units Converter
Fancy Units Converter
Fancy Units Converter
Currency and Unit Converter
Free

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.

Real-time conversion350+ physical units160+ currencies
πŸ”§ Utilities
(1.6K)
free with in-app purchases
9
Measures Unit Converter
Measures Unit Converter
Measures Unit Converter
Unit Converter
$1.99
$2.99 | 33% OFF

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.

971 units across 40 categories173 currencies with real-time ratesOffline conversion functionality
πŸ”§ Utilities
(20)
free with in-app purchases
10
Easy Temperature Converter Free
Easy Temperature Converter Free
Easy Temperature Converter Free
by MaoWare Corporation
Free

Effortlessly convert temperatures between various scales. Select your starting unit, input the temperature, and get instant results. Supports common and scientific units for comprehensive conversion needs.

Multiple temperature unit supportCelsius, Fahrenheit, KelvinScientific units (Delisle, Newton, etc.)
πŸ”§ Utilities
(93)
free with in-app purchases
11
Convoto - Unit Converter
Convoto - Unit Converter
Convoto - Unit Converter
Super simple and fast
Free

This app offers a straightforward and fast unit conversion experience, avoiding complex designs. It provides real-time conversions for a wide range of units and currencies, with automatic currency updates and offline functionality. Ideal for professionals, students, and anyone needing quick and accurate conversions.

Real-time conversions on one screenAutomatic currency updatesOffline functionality
πŸ”§ Utilities
(234)
free with in-app purchases
12
Unit Converter | Converter4U
Unit Converter | Converter4U
Unit Converter | Converter4U
Student Traveler Cook and DIY
Free
$0.99 | 100% OFF

This app provides a powerful and intuitive way to convert between a wide range of units, including length, weight, temperature, and more. It offers simultaneous conversion of multiple units and customizable options for a personalized experience. Get instant, accurate results for all your conversion needs.

Simultaneous multi-unit conversionCustomizable unit optionsCopy converted values to clipboard
πŸ“Š Productivity
(193)
free
13
Convertible: Unit Converter
Convertible: Unit Converter
Convertible: Unit Converter
Currency and Unit Converter
Free

This app offers a comprehensive unit and currency conversion tool with a visually appealing interface and extensive unit options. It supports standard and non-standard units, compound conversions, and fraction input, making it versatile for various needs.

Extensive standard and non-standard unit conversionsCurrency conversion with 161 currenciesCompound unit conversion
πŸ”§ Utilities
(97)
paid
14
Temperature Converter Β°C Β°F K
Temperature Converter Β°C Β°F K
Temperature Converter Β°C Β°F K
Celsius Fahrenheit Kelvin R Re
Free

This utility app offers a straightforward way to convert between multiple temperature units simultaneously. It features a dedicated numeric keyboard with support for negative numbers and decimals, ensuring quick and accurate conversions for various scientific and travel needs.

Simultaneous multi-unit conversionDedicated numeric keyboardSupports negative numbers and decimals
πŸ”§ Utilities
(4)
free
15
Units - Pro Unit Converter
Units - Pro Unit Converter
Units - Pro Unit Converter
by Homegrown Software Ltd
Free

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.

Hundreds of units across 43 categoriesDaily updated currency exchange ratesHide unused units
πŸ”§ Utilities
(150)
free with in-app purchases
16
Unit Converter - Converta
Unit Converter - Converta
Unit Converter - Converta
Unit converter: feet, inches
Free

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

Metric and imperial unit conversionWeight, length, temperature, area, timeOffline functionality
πŸ”§ Utilities
(148)
free with in-app purchases
17
Unit of measurement converter
Unit of measurement converter
Unit of measurement converter
Conversion units Calculator
Free

Easily convert between various units of measurement for length, area, volume, weight, and more. Input values and instantly see results, simplifying daily calculations for work, homework, or household tasks.

Converts 95 units across 15 categoriesSupports length, area, volume, weight, time, and moreInstant conversion results
πŸ”§ Utilities
(372)
ad-supported
18
Unit Converter HD.
Unit Converter HD.
Unit Converter HD.
30 categories, 700+ units
Free

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.

700+ Units of Measure30 Conversion CategoriesEasy-to-Use Interface
πŸ”§ Utilities
(642)
free with in-app purchases
19
Unit Converter ∞
Unit Converter ∞
Unit Converter ∞
The Best Unit Converter
$2.99

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.

50+ Categories & 1000+ UnitsCreate your own unitMixed-unit Support
πŸ”§ Utilities
(242)
free
20
Converter and Calculator Lite
Converter and Calculator Lite
Converter and Calculator Lite
Calculator & Unit Converter
Free

This utility app offers a powerful calculator and a comprehensive unit and currency converter. Customize your display by selecting specific units and categories, and perform conversions instantly with its clean interface. It supports over 500 units across 29 categories, including 161 currencies.

Full screen calculator with memory functionsCustomizable units and categoriesIn-line calculations for fractions and decimals
πŸ”§ Utilities
(83)
ad-supported