Comparison

Converter vs Unit Converter

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

Head to head
About

Converter

This app offers a comprehensive unit and hardness conversion tool with an easy-to-use interface. It includes currency conversion with updated exchange rates, over 300 engineering and scientific units, and a specialized hardness converter. Additional features like timezone conversion, pace calculation, and a standard calculator enhance its utility.

Highlights
  • Currency converter with live exchange rates
  • Over 300 engineering and scientific units
  • Specialized hardness converter
  • Timezone conversion
  • Running pace calculator
  • Integrated standard calculator
  • Conversion history log
Features
Read full description

Trelleborg’s “Unit and Hardness Converter” converts a comprehensive list of units (incl. currencies) in an easy way. In addition, the app has a set of other useful features on board, like timezone conversion, percentage calculations, a running pace calculator and more What our users say: “Have been using it forever, never tried other converter as this one does the job perfectly” - Lazareth_fr “Fabulous resource, but also a functional masterpiece!” -Otto. “This is needed by all engineers. So simple and easy to use” -JLa03.   FEATURES • Easy-to-use interface • Currency converter with in-app exchange rate update functionality • Over 300 engineering and scientific conversion units in 32 categories • Hardness converter with 16 conversion tables based on ASTM E140-07 and ISO-18265 for quick conversion between different scales • Video library: features the extensive Trelleborg Sealing Solutions YouTube library • Toggle between units • Switch between dark and white theme • Conversion history log • Create favorite lists • Standard calculator integrated with unit converter DIMENSIONS • Area • Currency • Current • Data • Density • Distance • Dynamic Viscosity • Energy • Force • Frequency • Kinematic Viscosity • Moment of inertia • Power • Prefixes • Pressure • Speed • Strength • Temperature • Time • Torque • Volume • Weight • Fuel Consumption • Glucose • Vacuum • Numbers • Illumination • Radioactivity • Radiation (absorbed) • Angles • Volume Flow Rate • Calorie • Metric Prefixes • Typography • Electric Charge OTHER MISCELLANEOUS CATEGORIES • Timezone conversion • Clothing sizes / Shoe sizes • International power plugs • Running pace calculator • Percentage calculator • Pace • Hex, Binary, Decimal • BMI (metric/inch) HARDNESS SCALES INCLUDED • Rockwell (HRC, HRA, HRD, HRF, HRG, HRE, HR-15-N, HR-30N, HR-45-N, HR45-T, HR-15T, HR-30T, HR45-T) • Brinell (HBW, HBS) • Vickers (HV, • Knoop (HK) The app is available in English, German and Chinese languages. Download now or contact us with any questions.

About

Unit Converter

Features
Read full description

Introducing Unit Converter - the ultimate tool for hassle-free unit conversions on your mobile device! Whether you're a student, professional, or simply someone who frequently needs to convert units, this app is designed to make your life easier. With a sleek and intuitive interface, Unit Converter offers a wide range of conversion options covering various categories, including length, weight, volume, temperature, time, speed, and more. No more searching through numerous websites or fumbling with complex formulas - this app puts all the conversion power in the palm of your hand. You can also bookmark/save or share the conversions.

Screenshots

Converter4 screens
Unit Converter4 screens

Verdict

The call

The clearest difference is ads: Converter at none against Unit Converter's shown. Converter also leads on update cadence (every 2 months vs every 8 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Converter ships an update every 2 months, Unit Converter every 8 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Converter versus Unit Converter: the parameters behind the verdict, then further details
ParameterConverterUnit Converter
PriceFreeFree
Rating4.9 (981 ratings) — better—
Positive reviews93.9% of reviews—
Number of ratings981 — better—
Update frequencyEvery 2 months — betterEvery 8 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size37 MB6 MB
Age rating12+4+
DeveloperTrelleborg Sealing SolutionsRAJAMRAGHU TECH

Bugs and requests

Converter

Reported bugs

2 issues
  • Occasional crashes on startup for non-English/German users
  • Conversion from meters to feet does not show inches

Requested features

3 requests
  • Add fuel efficiency conversions
  • Allow users to set favorite conversions as default
  • Improve currency conversion rate updates

Unit Converter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Converter

No in-app purchases

None

Unit Converter

No in-app purchases

Questions

Is Converter free?
Converter is free to download, with no in-app purchases.
Is Unit Converter free?
Unit Converter is free to download, with no in-app purchases.
Do Converter or Unit Converter have ads?
Unit Converter shows ads; Converter does not.
Which is updated more often, Converter or Unit Converter?
Converter ships an update every 2 months, and Unit Converter every 8 months. Most recently, Converter was updated on November 6, 2026 and Unit Converter on October 30, 2026.

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