Comparison

Metric Conversions Premium vs Metrix Toolkit

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

Head to head
About

Metric Conversions Premium

This utility app offers a comprehensive suite of unit and currency conversions with a clean interface. It works offline and provides precise results, breaking down complex units into smaller components for detailed analysis. Users can save frequent conversions for quick access.

Highlights
  • No ads or data tracking
  • Offline functionality
  • Over 30,000 unit conversions
  • 130+ currencies with hourly updates
  • Save favorite conversions
  • Precise results up to 5 decimal places
  • Detailed unit breakdowns
Features
Read full description

Premium version of the unit converter app from the most popular metric conversions website in the world, metric-conversions.org. Over a billion visitors have used our website, try our app and see why we're so popular! FEATURES: No advertisements, tracking or any of your user data used Easy to use clear interface Works offline All popular unit conversions (over 30,000 of them) Over 130 currencies (including Bitcoin) with exchange rates updated every hour Store your favorite conversions for quick access Answers in fractions where needed. Obtain conversion results with up to 5 decimal places Imperial units split into other imperial units – so you can get a weight in stones and pounds, pounds and ounces, etc. Lengths break down into feet and inches, etc. WEIGHT: Kilograms, Pounds, Stones, Ounces, Grams, Carats, Grains, Hundredweights, Microgram, Milligrams, Ounces, Pennyweights, Tons, Troy pounds, Troy ounces TEMPERATURE: Celsius, Fahrenheit, Kelvin, Rankine, Newton, Réaumur, Rømer, Delisle. LENGTH: Miles, Yards, Feet, Inches, Kilometers, Meters, Centimeters, Chains, Decimeters, Furlongs, Leagues, Lightyears, Microinches, Microns, Millimeters, Parsecs, Nautical Leagues, Nautical Miles. AREA: Square Miles, Acres, Square Yards, Square Feet, Square Inches, Square Kilometers, Hectares, Square Meters, Square Centimeters, Square Millimeters, Square Microns, Square Microinches. VOLUME: Cups, Tablespoons, Teaspoons, Gallons, Pints, Gills, Ounces , Cubic Meters, Liters, Centiliters, Milliliters, Cubic Yards, Barrels, Quarts, Gills. SPEED: Miles per hour, Kilometers per hour, Meters per second, Knots, Mach, Light speed and more. TIME: Seconds, Minutes, Hours, Days. ANGLE: Degrees, Radians, Minutes (Angular), Seconds (Angular), Centrad, Gradians, Milliradians, Sign PRESSURE: Atmospheres, Bar, Pascals, Pound Force per Square Inch, Inches of Mercury, Inches of Water, Kilogram Force per Square Meter, Millibar, Millimeters of Mercury, Millimeters of Water, Newtons per Meter Squared, Pounds per Square Foot, Torrs CURRENCY: All state sponsored world currencies as well as Bitcoin. If you need anything added, email us at appcontact@metric-conversions.org and we'll do our best to put them in for you!

About

Metrix Toolkit

Access detailed information about your device's sensors, radios, and hardware. Inspect NFC tags, scan Bluetooth devices, and test audio output. Unlock advanced features with a one-time purchase.

Highlights
  • Sensor readouts (GPS, barometer, gyroscope)
  • NFC tag reading and writing
  • Bluetooth device scanning and GATT inspection
  • Audio output testing
  • LiDAR distance mapping
  • Network and device details
Features
Read full description

Metrix gives you a clean set of tools for the sensors, radios, network routes, clocks, audio hardware, and device details already built into your iPhone. Open the app when you want a quick look at GPS speed, compass heading, gyroscope motion, barometer pressure, battery status, Wi-Fi and cellular details, Bluetooth signals, NFC tags, camera hardware, storage, memory, screen and graphics details, audio output, biometrics, or LiDAR distance on supported iPhone models. NFC: read and inspect tags in depth chip maker, memory size, NDEF records, and decoded payloads. Metrix recognizes smart cards, transit cards, digital IDs, passports, and security keys. Write URL, text, contact, email, phone, SMS, location, and App Store records to blank tags, then erase them or permanently lock them as read-only. Bluetooth: scan nearby devices with live signal strength, decoded advertisements (iBeacon, Eddystone, device type), and a GATT inspector that connects and reads device info, battery, and services. Metrix also includes a Clock tool for local time, UTC comparison, time-zone details, and locale reference, plus Audio tools for speaker details, frequency testing, bass testing, and sound output checks. Free tools include live readouts, Checkup, public route lookup, Clock, Audio, the LiDAR dot-map distance view, NFC reading and basic writing, and Bluetooth scanning with GATT inspection. Metrix Pro is a one-time purchase that adds Find It, a live Bluetooth proximity finder with a distance ring, intensifying haptics, a direction hint, and 1 m calibration. Plus saved history, recordings, snapshots, saved Bluetooth, Wi-Fi, and NFC items, device nicknames, watches, a trip computer, exports and reports, NFC import/export, advanced NFC writing (Wi-Fi, custom MIME, external, and multi-record tags), and Wi-Fi/cellular speed tests. Metrix does not require an account and does not use ads, analytics, or tracking. Anything you save with Pro stays on your device unless you choose to export or share it. Readings depend on device hardware, iOS permissions, signal quality, location quality, and sensor availability.

Screenshots

Metric Conversions Premium4 screens
Metrix Toolkit4 screens

Verdict

The call

The clearest difference is price: Metrix Toolkit at Free against Metric Conversions Premium's $4.99. Metrix Toolkit also leads on rating (4.0 vs 3.0) and update cadence (every 2 weeks vs every 2 months). Metric Conversions Premium's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ratings volume 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

Metrix Toolkit is free to download; Metric Conversions Premium costs $4.99 up front. Metrix Toolkit sells 1 one-off in-app purchase. Metric Conversions Premium asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Metrix Toolkit holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Metric Conversions Premium ships an update every 2 months, Metrix Toolkit every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard7 real differences · 3 level
Metric Conversions Premium versus Metrix Toolkit: the parameters behind the verdict, then further details
ParameterMetric Conversions PremiumMetrix Toolkit
Price$4.99Free — better
Rating3.0 (2 ratings)4.0 (1 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings2 — better1
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size26 MB9 MB
Age rating4+4+
DeveloperWight HatJoseph May

Customer experience

Metric Conversions Premium

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Metrix Toolkit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Metric Conversions Premium

No in-app purchases

1 purchases

Metrix Toolkit

One-time1
  • Metrix Pro$4.99

Questions

Is Metric Conversions Premium free?
Metric Conversions Premium costs $4.99, with no in-app purchases.
Is Metrix Toolkit free?
Metrix Toolkit is free to download, with in-app purchases available.
Which has better reviews, Metric Conversions Premium or Metrix Toolkit?
Metrix Toolkit is rated higher. Metric Conversions Premium averages 3.0 out of 5 from 2 ratings, while Metrix Toolkit averages 4.0 from 1 ratings.
Do Metric Conversions Premium or Metrix Toolkit have ads?
Neither Metric Conversions Premium nor Metrix Toolkit shows ads.
Which is updated more often, Metric Conversions Premium or Metrix Toolkit?
Metric Conversions Premium ships an update every 2 months, and Metrix Toolkit every 2 weeks. Most recently, Metric Conversions Premium was updated on November 4, 2026 and Metrix Toolkit on October 31, 2026.

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