Comparison

Unit Converter Toolbox vs Unit Conversion

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Unit Converter Toolbox

Easily convert between various units of measurement for mass, temperature, distance, volume, pressure, area, weight, density, and more. This application supports both standard and exotic units, offering a straightforward solution for diverse conversion needs.

Highlights
  • Converts physical quantities
  • Converts volume units
  • Converts pressure units
  • Converts area units
  • Converts weight units
  • Converts temperature units
  • Converts density units
  • Converts length units
Features
Read full description

Unit Converter Toolbox is a fast and easy-to-use converter for everyday calculations. Convert between units across a wide range of categories, including: • Length and distance • Mass and weight • Temperature • Area • Volume • Speed • Time • Data • Power • Energy • Pressure • and more Simply choose a category, select the units, enter a value and get the result instantly. Designed to be quick and straightforward, Unit Converter Toolbox is useful at home, at work, while travelling, studying or whenever you need a conversion. Features: • Fast unit conversion • Wide range of measurement categories • Search for units • Clean and simple interface • Light and dark mode • Multiple languages • Works without an account

About

Unit Conversion

Features
Read full description

Unit conversion with the answer on screen before you ask. Type a number and read it in every unit of the category at once - kg to lb, lb to kg, km to miles, cm to inches, feet to meters, Celsius to Fahrenheit. There is no "from" list and no "to" list to tap through first, and no direction to switch. You open the app, the keypad is already there, and so is the answer. WEIGHT, THE SHORT WAY • kg to lb, lb to kg, kg to stone, lb to oz, g to oz - all live at the same time • Stone and pounds behave as one pair, the way a British scale reads them • The value and the units you used last are waiting for you next time you open the app LENGTH, DISTANCE, TEMPERATURE • Metric conversion: km, miles, meters, feet, inches, cm and yards on one list • °C, °F and kelvin, converted by the real formula rather than a rough factor • mph and km/h, liters, gallons, cups and milliliters work the same way SEVENTEEN CALCULATED CATEGORIES Weight, length, temperature, time, speed, area, volume, data storage, angle, data transfer, energy, force, fuel economy, power, pressure, torque and currency. Every category works like the weight one: one keypad, one list, every unit updating together. Search any unit by name or symbol and it opens straight away - type "oz", "stone" or "fahrenheit" and start converting. CURRENCY THAT WORKS OFFLINE TOO Rates for the major currencies are built into the app, so the very first conversion works before the phone has seen a network. Once online, they are refreshed once a day from Frankfurter, which publishes central bank reference rates. They are indicative rates for a holiday budget or a foreign price tag, not a trading terminal. Rates: Frankfurter / central banks. CLOTHING SIZE CHARTS Shoes, trousers and tops are reference tables rather than formulas: US, EU, UK and international columns side by side, for women, men, kids, and babies for shoes. DETAILS THAT MAKE IT FAST • Copy, paste and share the whole conversion - "12 m = 39.3701 ft" - from the actions panel • A haptic click as the unit dial passes each unit • Light and dark themes, an accent colour of your choice • 30 interface languages • Exact factors, not rounded shortcuts: 1 lb is 0.45359237 kg, 1 inch is 2.54 cm, 1 mile is 1.609344 km. Small numbers stay readable instead of collapsing into scientific notation. NUMBERS PEOPLE LOOK UP MOST 1 kg = 2.204623 lb | 10 kg = 22.05 lb | 70 kg = 154.32 lb 1 lb = 0.453592 kg | 100 lb = 45.36 kg | 150 lb = 68.04 kg 1 km = 0.621371 mi | 5 km = 3.107 mi | 1 mi = 1.609344 km 1 in = 2.54 cm | 30 cm = 11.81 in | 6 ft = 182.88 cm 20 °C = 68 °F | 100 °F = 37.78 °C Type any other number and the app does the same for it, instantly. FREE AND PREMIUM Free: twelve categories including weight, length, temperature and currency, unlimited conversions, with a banner on screen and one full-screen ad when you open Settings. Premium removes every ad and adds angle, data transfer, energy, force, torque and the three clothing size charts, plus a Favourites board you arrange yourself for the conversions you repeat. SUBSCRIPTION TERMS • Premium is offered as a monthly subscription (USD 4.99), an annual subscription (USD 29.99) with a 7-day free trial, or a one-time lifetime purchase (USD 59.99). Local prices are shown inside the app. • Payment is charged to your Apple Account when the purchase is confirmed. • A subscription renews automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. The account is charged for renewal within 24 hours before the period ends. • Manage the subscription and turn off auto-renewal in your Apple Account settings after purchase. • Any unused part of a free trial period is forfeited when a subscription is purchased. • Terms of Use (EULA): https://dimadyuk.github.io/terms-conditions.html • Privacy Policy: https://dimadyuk.github.io/privacy-policy.html A conversion is a five-second job. This app is built so it takes five seconds.

Screenshots

Unit Converter Toolbox4 screens
Unit Conversion4 screens

Verdict

The call

The clearest difference is in-app purchases: Unit Converter Toolbox at none against Unit Conversion's 3. Unit Converter Toolbox also leads on iOS requirement (15.0 vs 18.2). Unit Conversion's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Unit Conversion sells 3 in-app purchases, starting at $4.99 per month. Unit Converter Toolbox asks for nothing beyond the download.

UpkeepUpdate frequency

Unit Converter Toolbox ships an update every 3 months, Unit Conversion weekly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Unit Converter Toolbox versus Unit Conversion: the parameters behind the verdict, then further details
ParameterUnit Converter ToolboxUnit Conversion
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews12.7% of reviews—
Number of ratings—1 — better
Update frequencyEvery 3 monthsWeekly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.2
Further details — not scored
Size32 MB35 MB
Age rating4+4+
DeveloperAndrej PodlubnyjDzmitry Dzemidziuk

In-app purchases

None

Unit Converter Toolbox

No in-app purchases

3 purchases

Unit Conversion

Subscriptions2
  • Premium Monthly$4.991 Month
  • Premium Annual7 Days trial$29.991 Year
One-time1
  • Lifetime Premium$59.99

Questions

Is Unit Converter Toolbox free?
Unit Converter Toolbox is free to download, with no in-app purchases.
Is Unit Conversion free?
Unit Conversion is free to download, with in-app purchases available.
Do Unit Converter Toolbox or Unit Conversion have ads?
Both Unit Converter Toolbox and Unit Conversion show ads.
Which is updated more often, Unit Converter Toolbox or Unit Conversion?
Unit Converter Toolbox ships an update every 3 months, and Unit Conversion weekly. Most recently, Unit Converter Toolbox was updated on October 22, 2026 and Unit Conversion on October 24, 2026.

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