# Unit Converter - Convert all — Measurements & Calculations

> Comprehensive unit and currency converter with real-time exchange rates. (iPhone/iPad app by oWorld Software.)

- Source: https://appshunter.io/ios/app/unit-converter-convert-all/id417794697 (this page in markdown: same URL + `.md`)
- Developer: [oWorld Software](https://appshunter.io/developer/291192797)
- Category: Travel, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 13,462 App Store ratings · 536 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 68 MB
- Languages: American English, French (France), German (Germany), Hindi, Italian, Chinese (Simplified, China), European Spanish, Thai, Chinese (Traditional, Taiwan)
- Released: 2011-02-21
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/unit-converter-convert-all/id417794697/reviews.md

## What is Unit Converter?

Unit Converter: convert any measurement, currency or size in one tap.

IN SHORT
A fast, offline unit converter that turns any measurement, currency or clothing size into the answer you need — with live exchange rates and a built-in calculator. If you can use a calculator, you can use this.

WHO IT'S FOR
Cooks, contractors, DIY-ers, students, travelers and anyone who needs a quick, precise conversion. Also handy for engineers, nurses and online shoppers comparing international sizes.

WHAT YOU GET
• 18+ categories in one place — weight, length, temperature, volume, speed, area, time, data, energy and more.
• Live currency conversion — real-time exchange rates, updated automatically.
• A real calculator built in — type an expression and convert the result instantly.
• Works offline — every unit (except live rates) converts with no connection.

HOW IT WORKS
1) Pick a category from the icon grid.
2) Tap the two units you want and type a value — or a full calculation.
3) Read the precise result instantly, to the number of decimals you choose.

KEY FEATURES
• Currency — live forex rates for USD, EUR, GBP, JPY and more, plus crypto.
• Weight & mass — oz, lb, kg, g, mg, stone, metric tons.
• Length & distance — miles, km, yards, meters, feet, inches, cm, mm.
• Temperature — Celsius, Fahrenheit, Kelvin, Réaumur, Rankine.
• Volume — cups, tbsp, tsp, pints, gallons, liters and metric volumes.
• Clothing & shoe sizes — men, women, kids and babies, across countries.
• Plus speed, area, pressure, data, energy, fuel and angle.

WHY IT HELPS
Most people find the unit they need in a couple of taps and never open a second app. Rates stay current, so a EUR→USD check is accurate to the day.

FAQ
Q: What is it, in one line?
A: A unit converter that turns any measurement, currency or size into a precise result using a built-in calculator.

Q: Does it work without internet?
A: Yes — all units convert offline. Only live currency rates need a connection to refresh.

Q: Can it convert currencies in real time?
A: Yes, exchange rates update automatically so conversions reflect the current market.

DOWNLOAD AND CONVERT
Pick a category and get your first conversion in seconds.

Naturally, this app helps with unit conversion, the metric system, imperial units, currency exchange, cooking measurements and clothing sizes.

Auto-renewable subscription: Unit Converter Premium
- Full pack - 1-year renewal - USD 9.99 - available with a 7 days free trial
- Full pack - 1-month renewal - USD 0.99

The total amount for the subscription period will be charged to your iTunes Account. Unless you turn it off auto-renewal at least 24 hours before the end of the subscription period, the subscription will renew automatically for the same price and will be charged on to your iTunes Account. You can manage the subscription and turn off automatic renewal in the account settings for your Apple ID at any time. Any used portion of a free trial period will be forfeited when subscribing to a non-trial plan.

Please feel free to contact me if you have any questions: Olivier@oworld.co.

Terms of service: https://termsfeed.com/terms-service/5c8b6678a74ea05ab5f671329b35ddc1

Privacy policy: https://www.iubenda.com/privacy-policy/25720446

Keep in mind that this application is constantly evolving. Got an idea for improvement? Can’t find a category? Please, send me an email to olivier@oworld.fr

## Key features

- Real-time currency conversions
- Extensive unit categories (weight, temp, length, volume, etc.)
- Simple and intuitive interface
- Supports international currencies
- Includes time, speed, and IT units
- Unlockable premium units

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Get premium | $14.99 | per year |
| Unit Converter Premium - 1y | $8.99 | per year |
| Premium 1 year | $14.99 | per year |
| Premium 1 month | $2.49 | per month |
| Conversion Calculator Pro - 1y | $19.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Conversion clothing sizes 1y | $0.99 | one-time |
| Conversion liquids/volumes 1y | $0.99 | one-time |
| Conversion angles, forces 1y | $1.99 | one-time |
| Remove Ads 1y | $0.99 | one-time |
| Conversion of shoe sizes 1y | $1.99 | one-time |
| Currency Converter 1y | $1.99 | one-time |
| Convert all units + No ads | $29.99 | one-time |


## What do users think of Unit Converter?

Overall sentiment: mixed

**Pros**

- 🚀 Easy to use
- 🚀 Comprehensive unit conversions
- 👍 Helpful app
- 👍 Practical for engineering and mechanics
- 👍 Intuitive interface
- 👍 Extremely useful
- 👍 Convenient and always available

**Cons**

- 🔍 Too many ads
- 🔍 Ads make the app unusable
- 🔍 Ads are invasive and disrupt user experience
- 💰 Expensive subscription for ad-free version
- 🐛 Crashes and stability issues
- 🔍 Ads block access to features

**Commonly reported bugs**

- Conversion calculations are sometimes inaccurate
- Inability to enter decimal values in some conversions
- Compatibility issues with newer devices

**Most requested features**

- Dark mode option
- Favorites/frequently used units
- Improved ad-supported free version
- More customization options

## Recent user reviews (10 of 536)

All indexed reviews: https://appshunter.io/ios/app/unit-converter-convert-all/id417794697/reviews.md

### 1/5 — To many adds

*2026-08-16, version 3.0.22*

The adds make it unusable!  Yes it’s free, yes the developers should earn something!  But come on!!!!

### 5/5 — Convenient & easy

*2026-08-13*

Allows easy access to make quick conversations.

### 5/5 — Precise

*2026-08-13*

Good accuracy level is also a good

### 2/5 — Ads are far too obtrusive and very hard to find how to close

*2026-08-10, version 3.0.22*

Ads are far too obtrusive and very hard to find how to close. Shame because otherwise appears to be a good app. Because I use conversion so infrequently I really don’t want to pay ad free.

### 5/5 — So many options

*2026-08-07*

So handy to be able to convert quickly when building a business

### 5/5 — Love the unit converter app

*2026-08-06, version 3.0.21*

Excellent

### 4/5 — Schneller praktischer Umrechner

*2026-08-02*

Passende App z.B. für Nawi-Unterricht und fürs schnelle Umrechnen zwischen den Einheiten;
Grund für -1 Stern: zu häufige Werbung, die die Umrechnung für ca. 5 s unterbricht

### 5/5 — Trop pratique !

*2026-07-31*

À disposition pour comprendre et comparer les notices techniques des produits. Par exemple BTU versus kWh… Trop pratique !

### 1/5 — Volume and length are NOT the same.

*2026-07-29, version 3.0.21*

Doesn’t show proper measurements with the category I’m selecting.

### 5/5 — Très pratique

*2026-07-28*

Une application vraiment très pratique qui peut dépanner alors ce pas quotidiennement, mais en tout cas vraiment bien

## Frequently asked questions about Unit Converter

### What does the Conversion Calculator app do?

This app functions as a comprehensive unit and currency converter. It allows users to easily convert between various units of weight, temperature, length, volume, time, speed, and more. It also provides real-time currency exchange rates for international currencies.

### What are the key features of this conversion app?

Key features include real-time currency conversions with live exchange rates, a wide array of unit categories such as weight, temperature, length, and volume, and an intuitive interface for quick conversions. It also supports specialized units for IT, energy, and fuel consumption.

### How much does the Conversion Calculator app cost?

The app is free to download and use, with ads displayed. Users can opt for 'Converter Premium' via an auto-renewable subscription to remove ads and unlock additional units. Subscription options include a 1-year renewal for $9.99 (with a 7-day free trial) or a 1-month renewal for $0.99.

### What types of units can be converted?

The app supports a vast range of units including weight (ounces, pounds, kilograms), temperature (Celsius, Fahrenheit, Kelvin), length (miles, kilometers, feet, meters), volume (liters, gallons, cups), time, speed, computer memory, energy, fuel consumption, and electricity. It also includes currency conversions for major global currencies and cryptocurrencies.

### Who would benefit from using this app?

This app is ideal for cooks, contractors, DIY enthusiasts, travelers, students, and anyone who frequently needs to convert measurements or currencies. Its ease of use and comprehensive conversion options make it a valuable tool for everyday tasks and international dealings.

## Version history (last 5 releases)

### 3.0.23 — 2026-08-25

Bug fixes and performance improvements

### 3.0.22 — 2026-08-07

Bug fixes and performance improvements

### 3.0.21 — 2026-07-10

Bug fixes and performance improvements

### 3.0.20 — 2026-07-08

Bug fixes and performance improvements

### 3.0.19 — 2026-07-07

Bug fixes and performance improvements

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All apps by oWorld Software: https://appshunter.io/developer/291192797

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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 2026-08-26.*