Converter vs All Unit Conversion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
All Unit Conversion
Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.
- Length conversion
- Area conversion
- Volume conversion
- Mass conversion
- Time conversion
- Currency conversion
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This is a simple and useful free unit converter - Length Converter - Area Converter - Volume Converter - Mass Converter - Time Converter - Digital Storage Converter - Energy Converter - Currency Converter
Screenshots
Verdict
The clearest difference is review sentiment: Converter at 94% against All Unit Conversion's 50%. Converter also leads on ratings volume (897 vs 17) and rating (4.9 vs 4.6). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Converter holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Converter has 897 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 94% of Converter's written reviews are positive against 50% of All Unit Conversion's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.
| Parameter | Converter | All Unit Conversion |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (897 ratings) — better | 4.6 (17 ratings) |
| Positive reviews | 93.9% of reviews — better | 50.0% of reviews |
| Number of ratings | 897 — better | 17 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 37 MB | 22 MB |
| Age rating | 12+ | 4+ |
| Developer | Trelleborg Sealing Solutions | Tiago Do Couto |
Customer experience
Converter
All Unit Conversion
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
All Unit Conversion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Converter
No in-app purchases
All Unit Conversion
No in-app purchases
Questions
Is Converter free?
Is All Unit Conversion free?
Which has better reviews, Converter or All Unit Conversion?
Do Converter or All Unit Conversion have ads?
Which is updated more often, Converter or All Unit Conversion?
Other comparisons
