Comparison

Converter vs Unfurl

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

Unfurl

Automatically removes tracking parameters and AMP wrappers from URLs before pages load. Enhances privacy and provides a cleaner browsing experience by redirecting directly to the original destination. Works silently as a Safari extension.

Highlights
  • Strips UTM parameters and ad-click IDs
  • Unwraps AMP links to original destination
  • Works automatically in Safari's network layer
  • No account, sign-in, analytics, or telemetry
  • One purchase for Mac and iPhone/iPad
  • Cleans copied links on Mac
Features
Read full description

Every link you tap carries baggage — utm parameters, fbclid, gclid, affiliate tags, AMP wrappers. Pieces of the URL that exist only to track you or count clicks. Unfurl strips it out before the page even loads. And now it stops what it can't strip: cookie-consent banners, gone before they appear. Add Unfurl to Safari and it cleans links right in the network layer: tracking parameters are removed and AMP links are unwrapped to the real destination — automatically, on every page you open. No copying, no extra taps. The clean page is simply what loads. HOW IT WORKS Unfurl is a pair of Safari extensions. Turn them on once in Settings → Apps → Safari → Extensions — "Unfurl for Safari" for links, "Unfurl" for cookie banners — and they run quietly from then on. Link cleaning uses Safari's declarativeNetRequest rules, so it works entirely in the network layer: Unfurl never reads, sees, or alters the content of your pages. It only ever touches the URL. COOKIE BANNERS, HIDDEN New in 2.3: the second extension keeps consent pop-ups off the page before they render, through Apple's own content-blocker mechanism — no scripts, nothing read from what you browse. Nothing is clicked on your behalf: the site never gets an answer, which usually means no optional cookies at all. A page that won't scroll behind a banner it can't show? Tap Unfurl in Safari's page menu for an off switch for that site — about a second, synced to your other devices. Rules come from EasyList Cookie, credited, refreshed and converted on your device. WHAT GETS CLEANED • Campaign tags — utm_source, utm_medium, utm_campaign, and the rest of the family. • Ad-click IDs — fbclid, gclid, and thousands more, from the ClearURLs, Brave, and AdGuard URL Tracking lists. • AMP wrappers — google.com/amp/s/… and ampproject.org links unwrap straight to the canonical page, skipping the redirect. MAKE YOUR OWN RULES Some site pins a tracker the lists don't name yet? Make a rule for it, right on your iPhone. Paste the link — or, where Apple Intelligence is available, describe in plain words what to keep and what to strip — and Unfurl flags the likely tracking and lets you set each parameter to Remove, Keep, or Leave alone. Save it, and that site cleans your way from then on. Your rules sync privately over iCloud, so a rule made here is already on your Mac, and you can share one by email as a plain rule file. FRESH ON ITS OWN The tracker lists and the cookie list update by themselves — when you open the app, and in the background when iOS allows it. Unfurl checks politely: if a list hasn't changed, nothing is downloaded. New trackers get caught without waiting for an app update. SEE IT WORK Tap Unfurl in Safari to see how many links it has cleaned for you and the sites it cleaned most. Counted on your device, kept on your device — and it only counts links that actually carried tracking. PRIVACY POSTURE Everything happens on your iPhone or iPad. Unfurl has no account, no sign-in, no analytics, and no telemetry — not even for itself. Because it works in the network layer and Safari's own content blocker, it never has access to page content, passwords, or what you type. The Privacy Manifest declares zero tracking domains and zero collected data. The one network call fetches list updates. ONE PURCHASE, MAC AND iPHONE Unfurl on iPhone and iPad is part of the same purchase as Unfurl for Mac. On the Mac, Unfurl also cleans links the moment you copy them, keeps a menu-bar history of every clean, and can follow short links that need a network lookup. Want to see it before you enable it? Try the live test bench at unfurl.software/try. Quiet, fast, on your side.

Screenshots

Converter4 screens
Unfurl4 screens

Verdict

The call

The clearest difference is price: Converter at Free against Unfurl's $5.99. Converter also leads on iOS requirement (15.6 vs 17.2). Unfurl's advantage is update cadence (monthly vs every 2 months). On review sentiment, ads, in-app purchases 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

Converter is free to download; Unfurl costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Converter ships an update every 2 months, Unfurl monthly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Converter versus Unfurl: the parameters behind the verdict, then further details
ParameterConverterUnfurl
PriceFree — better$5.99
Rating4.9 (981 ratings) — better—
Positive reviews93.9% of reviews100.0% of reviews — better
Number of ratings981 — better—
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better17.2
Further details — not scored
Size37 MB7 MB
Age rating12+4+
DeveloperTrelleborg Sealing SolutionsJohnny dos Santos

Customer experience

Converter

All ratings897 ratings
Positive98.1%
Neutral1.3%
Negative0.6%
Written reviews608 reviews
Positive93.9%
Neutral3.3%
Negative2.8%

Unfurl

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Unfurl

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Converter

No in-app purchases

None

Unfurl

No in-app purchases

Questions

Is Converter free?
Converter is free to download, with no in-app purchases.
Is Unfurl free?
Unfurl costs $5.99, with no in-app purchases.
Do Converter or Unfurl have ads?
Neither Converter nor Unfurl shows ads.
Which is updated more often, Converter or Unfurl?
Converter ships an update every 2 months, and Unfurl monthly. Most recently, Converter was updated on November 6, 2026 and Unfurl on November 5, 2026.

Other comparisons