Comparison

Converter vs PDF Lighter

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

PDF Lighter

Features
Read full description

DF Lighter shrinks oversized PDFs on iPhone and Mac — without ever uploading your files. A PDF too heavy for an email, an online form, or an upload? Open it, pick a compression level, and get a much lighter version in seconds. • DEAD SIMPLE Three steps: pick a PDF, set the level, compress. That's it. • 4 COMPRESSION LEVELS From "Light" (near-original quality) to "Extreme" (smallest possible) — pick the right size/quality balance. • 100% ON YOUR DEVICE Compression runs locally. Your documents never leave your iPhone or Mac: nothing is sent to a server. • PRIVACY-FIRST No data collected. No trackers, no ads, no account. The app even works offline. • FREE Totally free, with no in-app purchases. Compare the before/after size, then save or share your lighter PDF. ``` ## 5. What's New (this version) ``` First release of PDF Lighter. Thanks for trying it! ```

Screenshots

Converter4 screens
PDF Lighter3 screens

Verdict

The call

The clearest difference is in-app purchases: Converter at none against PDF Lighter's 3. Converter also leads on device support (3 vs 1) and iOS requirement (15.6 vs 26.5). On price and ads 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. PDF Lighter sells 3 one-off in-app purchases. Converter asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Converter versus PDF Lighter: the parameters behind the verdict, then further details
ParameterConverterPDF Lighter
PriceFreeFree
Rating4.9 (897 ratings) — better
Positive reviews96.0% of reviews
Number of ratings897 — better
Update frequencyEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better26.5
Further details — not scored
Size37 MB1 MB
Age rating12+4+
DeveloperTrelleborg Sealing SolutionsMANUEL NOVO LOPES

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

PDF Lighter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Converter

No in-app purchases

3 purchases

PDF Lighter

One-time3
  • Small tip$0.99
  • Medium tip$3.99
  • Big tip$3.99

Questions

Is Converter free?
Converter is free to download, with no in-app purchases.
Is PDF Lighter free?
PDF Lighter is free to download, with in-app purchases available.
Do Converter or PDF Lighter have ads?
Neither Converter nor PDF Lighter shows ads.

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