---
title: "Converter : Units - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "The Ultimate Unit Converter & Physical Constants Reference  Convert between 30+ categories with 200+ units instantly. Perfect for students, engineers, scientists, and professionals.  KEY FEATURES:  CO"
---

# Converter : Units — United States
> 180+ Constants • Learn Mode

![Converter App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/d8/96/c3/d896c318-4de7-fa13-5381-2b28f5c2d129/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/400x400bb.png)

**Developer:** [Alok Singh](https://apptail.io/developer/alok-singh-KPF)
**Category:** Productivity
**Rating:** 4.7/5 (32 ratings)
**Price:** Free
**Bundle ID:** com.aryansbtloe.unitsconverter.ios
**Store:** Apple App Store
**Country:** United States
**Version:** 2026.07.06 (released 2026-07-08)
**Original Release:** 2020-05-30

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1515811220)
**AppTail Page:** [https://apptail.io/app/units-converter-calculator-Oebd/united-states](https://apptail.io/app/units-converter-calculator-Oebd/united-states)

## Converter Description
The Ultimate Unit Converter & Physical Constants Reference

Convert between 30+ categories with 200+ units instantly. Perfect for students, engineers, scientists, and professionals.

KEY FEATURES:

COMPREHENSIVE CONVERSIONS
• 30+ conversion categories including Weight, Temperature, Distance, Speed, Volume, Energy, Pressure, and more
• 200+ units across all categories
• Real-time conversions with instant results

PHYSICAL CONSTANTS LIBRARY
• 180+ physical constants with detailed explanations
• Search functionality to quickly find any constant
• Each constant includes:
  - What it is: Clear explanation
  - Why it's important: Significance in physics
  - How it's used: Practical applications
  - Interesting facts: Fascinating insights
• Covers fundamental constants, particle physics, thermodynamics, astronomy, and more

LEARNING MODES
• Quick Convert: Instant results for fast conversions
• Learn Mode: Guided discovery with progressive hints
• Challenge Mode: Test your estimation skills
• Track your progress across all categories

PROGRESS TRACKING
• Monitor your learning progress
• View hint usage statistics
• Track challenge scores
• See completion across all 30 categories

PREMIUM DESIGN
• Beautiful, modern interface
• Smooth animations and transitions
• Intuitive navigation
• Professional look and feel

CONVERSION HISTORY
• Automatic saving of all conversions
• Easy access to past calculations
• Organized by category
• Clean, readable format

SMART FEATURES
• Auto-save conversions
• Keyboard-friendly interface
• Search and filter constants
• Real-world reference examples

Perfect for:
• Students learning physics and chemistry
• Engineers and scientists
• Professionals needing quick conversions
• Anyone working with units and constants

Download now and experience the most comprehensive unit converter with an extensive physical constants reference!

## Converter Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/08/36/df/0836dfdb-503d-9b39-6c4e-6d0badfd21b5/pr_source.png/2048x2732.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/77/9e/d4/779ed4ad-6e68-c109-ba30-24f547ebf700/pr_source.png/2048x2732.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/22/09/1c/22091cfc-b1a9-039d-89e2-3b3d084a38eb/pr_source.png/2048x2732.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/1d/7f/63/1d7f63cd-56e6-0464-1e12-cddee5588ae5/pr_source.png/2048x2732.png)

## Converter Rating Breakdown in United States
- 5 stars: 27 (84%)
- 4 stars: 3 (9%)
- 3 stars: 1 (3%)
- 2 stars: 0 (0%)
- 1 stars: 1 (3%)

## Converter Reviews in United States

### **--- "Lacking a Lot"
Beautiful interface but very limited units. No volume, no millimeter option in distance, etc.
-- Twila22, 2021-10-27

### *---- "needs more units"
Downloaded this app to use for volume conversions.  Can't use it since volume is not offered.  Will delete.
-- nelb11, 2021-09-25

### *---- "too few units"
very limited conversions
-- oldie164, 2021-09-16

[View all Converter reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)

## Converter In-App Purchases
| Item | Price |
|------|-------|
| Remove Ads | $0.99 |


## Converter Discovered Keywords
- converter
- units
- convert units
- конвертер

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## Converter Available In
- [United States](https://apptail.io/app/units-converter-calculator-Oebd/united-states)
- [Vietnam](https://apptail.io/app/units-converter-calculator-Oebd/vietnam)
- [Italy](https://apptail.io/app/units-converter-calculator-Oebd/italy)
- [Canada](https://apptail.io/app/units-converter-calculator-Oebd/canada)
- [India](https://apptail.io/app/units-converter-calculator-Oebd/india)
- [France](https://apptail.io/app/units-converter-calculator-Oebd/france)
- [Peru](https://apptail.io/app/units-converter-calculator-Oebd/peru)
- [Brazil](https://apptail.io/app/units-converter-calculator-Oebd/brazil)
- [Egypt](https://apptail.io/app/units-converter-calculator-Oebd/egypt)
- [Romania](https://apptail.io/app/units-converter-calculator-Oebd/romania)
- [Saudi Arabia](https://apptail.io/app/units-converter-calculator-Oebd/saudi-arabia)
- [Malaysia](https://apptail.io/app/units-converter-calculator-Oebd/malaysia)
- [Nepal](https://apptail.io/app/units-converter-calculator-Oebd/nepal)
- [Ecuador](https://apptail.io/app/units-converter-calculator-Oebd/ecuador)
- [South Africa](https://apptail.io/app/units-converter-calculator-Oebd/south-africa)
- [Indonesia](https://apptail.io/app/units-converter-calculator-Oebd/indonesia)
- [United Kingdom](https://apptail.io/app/units-converter-calculator-Oebd/united-kingdom)
- [Belgium](https://apptail.io/app/units-converter-calculator-Oebd/belgium)
- [China](https://apptail.io/app/units-converter-calculator-Oebd/china)
- [Ukraine](https://apptail.io/app/units-converter-calculator-Oebd/ukraine)
- [Germany](https://apptail.io/app/units-converter-calculator-Oebd/germany)
- [South Korea](https://apptail.io/app/units-converter-calculator-Oebd/south-korea)
- [Uzbekistan](https://apptail.io/app/units-converter-calculator-Oebd/uzbekistan)
- [Taiwan](https://apptail.io/app/units-converter-calculator-Oebd/taiwan)
- [Russia](https://apptail.io/app/units-converter-calculator-Oebd/russia)
- [Hong Kong SAR China](https://apptail.io/app/units-converter-calculator-Oebd/hong-kong)
- [Bulgaria](https://apptail.io/app/units-converter-calculator-Oebd/bulgaria)
- [Singapore](https://apptail.io/app/units-converter-calculator-Oebd/singapore)
- [Slovenia](https://apptail.io/app/units-converter-calculator-Oebd/slovenia)
- [Switzerland](https://apptail.io/app/units-converter-calculator-Oebd/switzerland)
- [United Arab Emirates](https://apptail.io/app/units-converter-calculator-Oebd/united-arab-emirates)
- [Czechia](https://apptail.io/app/units-converter-calculator-Oebd/czechia)
- [Croatia](https://apptail.io/app/units-converter-calculator-Oebd/croatia)
- [Uruguay](https://apptail.io/app/units-converter-calculator-Oebd/uruguay)
- [Mexico](https://apptail.io/app/units-converter-calculator-Oebd/mexico)
- [Oman](https://apptail.io/app/units-converter-calculator-Oebd/oman)
- [Algeria](https://apptail.io/app/units-converter-calculator-Oebd/algeria)
- [Colombia](https://apptail.io/app/units-converter-calculator-Oebd/colombia)
- [Philippines](https://apptail.io/app/units-converter-calculator-Oebd/philippines)
- [Bahrain](https://apptail.io/app/units-converter-calculator-Oebd/bahrain)
- [Argentina](https://apptail.io/app/units-converter-calculator-Oebd/argentina)
- [Portugal](https://apptail.io/app/units-converter-calculator-Oebd/portugal)
- [Namibia](https://apptail.io/app/units-converter-calculator-Oebd/namibia)
- [Nigeria](https://apptail.io/app/units-converter-calculator-Oebd/nigeria)
- [Netherlands](https://apptail.io/app/units-converter-calculator-Oebd/netherlands)
- [Norway](https://apptail.io/app/units-converter-calculator-Oebd/norway)
- [New Zealand](https://apptail.io/app/units-converter-calculator-Oebd/new-zealand)
- [Panama](https://apptail.io/app/units-converter-calculator-Oebd/panama)
- [Pakistan](https://apptail.io/app/units-converter-calculator-Oebd/pakistan)
- [Poland](https://apptail.io/app/units-converter-calculator-Oebd/poland)
- [Paraguay](https://apptail.io/app/units-converter-calculator-Oebd/paraguay)
- [Qatar](https://apptail.io/app/units-converter-calculator-Oebd/qatar)
- [Sweden](https://apptail.io/app/units-converter-calculator-Oebd/sweden)
- [Slovakia](https://apptail.io/app/units-converter-calculator-Oebd/slovakia)
- [Suriname](https://apptail.io/app/units-converter-calculator-Oebd/suriname)
- [Thailand](https://apptail.io/app/units-converter-calculator-Oebd/thailand)
- [Tunisia](https://apptail.io/app/units-converter-calculator-Oebd/tunisia)
- [Türkiye](https://apptail.io/app/units-converter-calculator-Oebd/turkey)
- [Senegal](https://apptail.io/app/units-converter-calculator-Oebd/senegal)
- [Armenia](https://apptail.io/app/units-converter-calculator-Oebd/armenia)
- [Austria](https://apptail.io/app/units-converter-calculator-Oebd/austria)
- [Australia](https://apptail.io/app/units-converter-calculator-Oebd/australia)
- [Azerbaijan](https://apptail.io/app/units-converter-calculator-Oebd/azerbaijan)
- [Barbados](https://apptail.io/app/units-converter-calculator-Oebd/barbados)
- [Bermuda](https://apptail.io/app/units-converter-calculator-Oebd/bermuda)
- [Brunei](https://apptail.io/app/units-converter-calculator-Oebd/brunei)
- [Botswana](https://apptail.io/app/units-converter-calculator-Oebd/botswana)
- [Belarus](https://apptail.io/app/units-converter-calculator-Oebd/belarus)
- [Belize](https://apptail.io/app/units-converter-calculator-Oebd/belize)
- [Chile](https://apptail.io/app/units-converter-calculator-Oebd/chile)
- [Cyprus](https://apptail.io/app/units-converter-calculator-Oebd/cyprus)
- [Denmark](https://apptail.io/app/units-converter-calculator-Oebd/denmark)
- [Dominican Republic](https://apptail.io/app/units-converter-calculator-Oebd/dominican-republic)
- [Estonia](https://apptail.io/app/units-converter-calculator-Oebd/estonia)
- [Spain](https://apptail.io/app/units-converter-calculator-Oebd/spain)
- [Finland](https://apptail.io/app/units-converter-calculator-Oebd/finland)
- [Grenada](https://apptail.io/app/units-converter-calculator-Oebd/grenada)
- [Ghana](https://apptail.io/app/units-converter-calculator-Oebd/ghana)
- [Greece](https://apptail.io/app/units-converter-calculator-Oebd/greece)
- [Honduras](https://apptail.io/app/units-converter-calculator-Oebd/honduras)
- [Hungary](https://apptail.io/app/units-converter-calculator-Oebd/hungary)
- [Ireland](https://apptail.io/app/units-converter-calculator-Oebd/ireland)
- [Israel](https://apptail.io/app/units-converter-calculator-Oebd/israel)
- [Iceland](https://apptail.io/app/units-converter-calculator-Oebd/iceland)
- [Jordan](https://apptail.io/app/units-converter-calculator-Oebd/jordan)
- [Japan](https://apptail.io/app/units-converter-calculator-Oebd/japan)
- [Kenya](https://apptail.io/app/units-converter-calculator-Oebd/kenya)
- [Kuwait](https://apptail.io/app/units-converter-calculator-Oebd/kuwait)
- [Cayman Islands](https://apptail.io/app/units-converter-calculator-Oebd/cayman-islands)
- [Kazakhstan](https://apptail.io/app/units-converter-calculator-Oebd/kazakhstan)
- [Lebanon](https://apptail.io/app/units-converter-calculator-Oebd/lebanon)
- [Sri Lanka](https://apptail.io/app/units-converter-calculator-Oebd/sri-lanka)
- [Lithuania](https://apptail.io/app/units-converter-calculator-Oebd/lithuania)
- [Latvia](https://apptail.io/app/units-converter-calculator-Oebd/latvia)
- [Madagascar](https://apptail.io/app/units-converter-calculator-Oebd/madagascar)
- [North Macedonia](https://apptail.io/app/units-converter-calculator-Oebd/north-macedonia)
- [Mali](https://apptail.io/app/units-converter-calculator-Oebd/mali)
- [Macao SAR China](https://apptail.io/app/units-converter-calculator-Oebd/macau)
- [Malta](https://apptail.io/app/units-converter-calculator-Oebd/malta)
- [Mauritius](https://apptail.io/app/units-converter-calculator-Oebd/mauritius)
- [Venezuela](https://apptail.io/app/units-converter-calculator-Oebd/venezuela)

---

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