Is unitMeasure Worth Buying? Offline Unit Converter for Android Explained

unitMeasure is worth considering if you want an Android unit converter that works with no internet connection, takes up almost no storage, and asks for no permissions. According to the official unitMeasure site, it runs conversions entirely offline, supports Android 5.0 (Lollipop) and up, occupies slightly less than 2 MB, and covers 17 categories with well over 150 conversions. It is a paid app — the site shows a "Buy Now!" entry rather than a free download — so the decision comes down to whether its offline speed, small size, and privacy stance match how you actually use a converter.

What unitMeasure actually does

The core pitch on the official site is simple: conversions happen on the device, not on a server. The site states the app "converts units completely offline" and provides results in real-time while you type. That matters in places where a signal is unreliable — a lab, a workshop, a plane, or a basement — because there is no request to send and no result to wait for.

Two practical consequences follow from offline operation:

• Speed is independent of your connection and phone power. The site claims conversions run fast regardless of device, since nothing is fetched remotely.
• No network dependency means no failure mode tied to connectivity. If the app is installed, it converts.

The site also notes the app supports landscape mode, which is useful for wide conversion tables or when you are entering long numbers.

Size, design, and themes

The sub-2 MB figure is the standout detail. Most converter apps that bundle ads or analytics libraries are far larger, so the small size is consistent with the app's claim of being highly optimized and with its no-permission design. If you keep a lean phone or install apps on older hardware, this is a real advantage rather than a marketing line.

Privacy: what "no permissions" means here

The site says the app uses no permissions and therefore does not track your location, record you, show ads, or sell your data to third parties. For a unit converter, this is a coherent position: converting inches to centimeters requires no access to your contacts, camera, storage, or location, so an app that requests none of those is behaving the way the task demands.

If privacy is your main reason for switching converters, this is the strongest argument in the app's favor — but verify it yourself after installing by checking the permission list in your Android settings. That takes a few seconds and confirms the claim on your own device.

Conversion coverage: is your unit in there?

The site lists 17 categories and over 150 conversions. The categories named on the official page include:

• Length — inches, centimeters, feet, yards, meters, miles, kilometers, picometers, millimeters, light-years
• Volume — teaspoons, tablespoons, cups, fluid ounces, pints, quarts, gallons, cubic feet, cubic inches, cubic centimeters, milliliters, liters, deciliters
• Energy — joules, kilojoules, calories, kilocalories, inch-pounds, foot-pounds, megawatt-hours, kilowatt-hours, electron volts, BTUs, barrels of oil, horsepower
• Time — milliseconds through centuries, including fortnights
• Digital storage — bits through petabytes, plus kilobits through gigabits
• Mass/Weight — ounces, grams, kilograms, pounds, stones, metric tons, tons US, slugs, grains
• Fuel efficiency — mpg, km/L, L/100 km, gallons per 100 miles, miles per liter (US & UK)
• Area — square kilometers through square inches, plus hectares, acres, ares
• Pressure — pascals, megapascals, kilopascals, PSI, PSF, atmospheres, bars, mmHg, inHg
• Angle — degrees, gradians, minutes, mils, quadrants, radians

Before buying, check this list against your own recurring conversions. The coverage is broad and includes some less common units (slugs, fortnights, light-years, barrels of oil), but the site's page shows ten of the seventeen categories in detail. If you regularly convert something outside these — currency, for example, which cannot work offline because rates change — this app will not replace a dedicated tool for that.

Before you buy: a short checklist

1. Confirm your Android version. The site requires Android 5.0 (Lollipop) or later. Older devices are not supported.
2. Check your unit list. Scan the categories above against what you convert most often. If everything you need is covered, the app fits.
3. Decide if offline matters to you. If you always have signal and use a free web converter, the offline advantage is smaller — though the no-ads, no-permission design may still appeal.
4. Expect a purchase, not a free tier. The site presents "Buy Now!" as the entry point and does not describe a free version, so plan on paying. The site does not list a price on the page, so check the store listing for the current amount before committing.
5. Verify permissions after install. Open the app's info page in Android settings and confirm the permission list is empty, matching the site's claim.

Who should buy it, and who should skip it

Buy it if you work or travel where connectivity is unreliable, you want a converter that stays under 2 MB, you care about an app that requests no permissions and shows no ads, or you need a broad unit set (length, volume, energy, pressure, fuel efficiency, and more) in one place.

Skip it if your main conversion need is currency or another live-rate category that cannot function offline, you are on a device older than Android 5.0, or you are satisfied with a free web-based converter and do not value the offline or privacy features enough to pay.

The decision is narrow and testable: check your Android version, check your unit list, and confirm you are willing to pay. If all three pass, unitMeasure's offline speed, tiny footprint, and no-permission design make it a reasonable purchase for an Android unit converter.