AppCorpus
Market US

Unit Converter - Best Unit App

by Alan Mrvica

iPhone · iPad

Active Last checked 30 Aug 2026

Quick verdict

What it is
Store information collected; independent summary not yet available.
At a glance
  • Free to download
  • In-app purchases

Categories and search queries

Official categories

AppCorpus categories

Key functions

Function Availability Access Scope Evidence
Family Sharing Yes Unknown App Store Store published
Free app Yes Free Store published
In-app purchases Yes Limited free Store published

Screens

App Store

25 store screenshots

Unit Converter - Best Unit App ipad screenshot 1
Unit Converter - Best Unit App ipad screenshot 2
Unit Converter - Best Unit App ipad screenshot 3
Unit Converter - Best Unit App ipad screenshot 4

Pricing & paywalls

App Store

  • Premium — $3.99
  • Premium — $6.99
  • Premium — $24.99
  • Premium — $34.99

Ratings & reviews

App Store

4.8 192986 ratings · App Store

  1. 5/5It does EXACTLY what it says, and that’s AWESOME!

    Like most people in the US, the metric system, to me, is a mystery. I used to work in international sales and can’t overstate how important it is to get an understanding of the metric system. This is especially true when taking custom-made product orders which require precise measurements of size, weight & length. International customers almost exclusively use and provide measurements in metric. This app makes those conversions from Imperial to Metric and vice versa, quickly and efficiently. On another note, for culinary situations, I personally use metric. It’s much more precise, which is essential dealing with liquids and especially for baking. It is infinitely easier to convert baking recipes from cups, ounces and pounds entirely to metric units with this app. My baking results went through the roof once I started metric units. This app even does temperatures from Fahrenheit to Celsius. I use this app every day, get it.

    Bertorama · 30 Aug 2026

  2. 5/5Allergies or Covid 19?

    Seven months ago, after 29 years of living abroad, I retired and moved back to the United States. Oregon to be exact. I still have not unpacked all my household goods. But in digging through drawers that contain hastily unpacked items, I found three priceless objects that are unavailable at stores now during the first weeks of the Corona Virus outbreak. These items were two unopened packages of a hand wipes that kill %99.9 of all bacteria, a thermometer, and bottle of hydrogen peroxide. Do now the peroxide is used to clean the thermometer. But the thermometer measures in Celsius. So is a temperature of 37 degrees C with head congestion and a cough an indication of something more than seasonal allergies or not? I don’t know yet, but I am so grateful that I still have my Units Plus app on my cell phone. And I will continue to monitor, record and use the app Units Plus app to make informed decisions about my health. Thank you Units Plus.

    KJ Decided · 30 Aug 2026

  3. 5/5Pleeze don’t complicate it now

    I’ve been using this app all the time for many years. This is the first time I ever opened it when it had ads on it, but I’m thinking, somebody’s put this good, useful app out and they gotta make a living and I’ve been using it all these years so I went ahead and paid them for a year of the premium app. If they didn’t screw it up making it complicated then my previous five star review is gonna remain in place. Also, I hope that they aren’t just now asking for a paid app because they lost funding (chainsaw-style) for putting out a genuinely useful app.

    SpeckleRider · 30 Aug 2026

  4. 3/5No Newtons? (Behind Paywall)

    Edit: I was even more disappointed to find out today that Newtons are behind the paywall of the premium version of this app under a locked category called “Force.” My rating went from 4 to 3 stars, and I have less hope now for this app ever being what I hoped it would be when I first wrote this review. I was disappointed to find out there is no option for Newtons in the “Weight” category! I’ve been using this app for years and now that I work professionally as a mechanical engineer, Newtons are a very commonly used unit many calculations because they are the normal measure of weight where kilograms are the measure of mass (I don’t mind these being in the same category on this app though). They are THE unit for weight in the Système International d’Unités (SI or metric system). I need Newtons on this app, and my rating will become 5 stars when I get it. Thank you so much, in advance, for taking my feedback and adding Newtons to this app!

    Helpful opinion · 30 Aug 2026

  5. 5/5Best at this game!

    I’ve tried several other apps over the years, but unfortunately, many of them were eventually abandoned by their developers. Each time, I had to search for a replacement—and it was always tough to find one that worked well and didn’t bombard me with annoying ads. Then, about two years ago, I discovered this app. It took a little time to get used to how it works, but once I figured it out, it became my go-to. If you’re looking for a complete, reliable converter, look no further—download this app. Great job, developers!

    hugoboss04 · 30 Aug 2026

Privacy & accessibility

App Store

Privacy

  • Data Linked to You — Analytics — Diagnostics — Crash Data Developer declared
  • Data Linked to You — Analytics — Diagnostics — Performance Data Developer declared
  • Data Linked to You — Analytics — Identifiers — Device ID Developer declared
  • Data Linked to You — Analytics — Location — Coarse Location Developer declared
  • Data Linked to You — Analytics — Usage Data — Advertising Data Developer declared
  • Data Linked to You — Analytics — Usage Data — Product Interaction Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Diagnostics — Crash Data Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Diagnostics — Performance Data Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Identifiers — Device ID Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Location — Coarse Location Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Usage Data — Advertising Data Developer declared
  • Data Linked to You — Developer’s Advertising or Marketing — Usage Data — Product Interaction Developer declared
  • Data Linked to You — Third-Party Advertising — Diagnostics — Crash Data Developer declared
  • Data Linked to You — Third-Party Advertising — Diagnostics — Performance Data Developer declared
  • Data Linked to You — Third-Party Advertising — Identifiers — Device ID Developer declared
  • Data Linked to You — Third-Party Advertising — Location — Coarse Location Developer declared
  • Data Linked to You — Third-Party Advertising — Usage Data — Advertising Data Developer declared
  • Data Linked to You — Third-Party Advertising — Usage Data — Product Interaction Developer declared
  • Data Linked to You — Diagnostics Developer declared
  • Data Linked to You — Identifiers Developer declared
  • Data Linked to You — Location Developer declared
  • Data Linked to You — Usage Data Developer declared
  • Data Used to Track You — Diagnostics — Crash Data Developer declared
  • Data Used to Track You — Diagnostics — Performance Data Developer declared
  • Data Used to Track You — Diagnostics Developer declared
  • Data Used to Track You — Identifiers — Device ID Developer declared
  • Data Used to Track You — Identifiers Developer declared
  • Data Used to Track You — Location — Coarse Location Developer declared
  • Data Used to Track You — Location Developer declared
  • Data Used to Track You — Usage Data — Advertising Data Developer declared
  • Data Used to Track You — Usage Data — Product Interaction Developer declared
  • Data Used to Track You — Usage Data Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

  • 10.2 · 2 Dec 2025

    Fixed typo error in Weight category

  • 1.1
  • 1.3

    -fixed icon alignment issue -fixed crashing if SHARE button was touched in settings -changed significant digits to 10 (from 12) to better fit on iPhone display -added button to rate the app in settings -added Stones to Weight category -added Speed of Light (vacuum), Mach number (air and water) to Speed category -added Liters and milliliters, re-worded some units to have more clear meaning, fixed UK Barrel and Bushel for Volumes category -added Millennium, Century, Decade, Month, Millisecond to Time category -fixed spelling "mili" to "milli" -UI minor corrections for iPhone display label -fixed number formatting for all countries (now it follows iOS system-wide settings for all number formats)

  • 2.2

    -fixed currency rates bug -totally new modern flat look -iPad app now supports landscape and portrait rotations -added swap button -iPhone 6 and 6 Plus support added

  • 2.4

    - Corrected psf to psi (Pressure unit) conversion

  • 2.5

    - increased space between iAd banner and keypad to avoid accidental taps on banners.

  • 2.6

    - Zambian flag missing fixed - Ads optimization

  • 2.7

    - Fixed critical bug that could crash the app - Switched to new server - minor ads update

  • 2.8

    -minor changes and general cleanup

  • 3.0

    - Compatible with iOS 9 to iOS 13.2 and later - Added fast search for currency - List of currencies updated - Other conversions added - Updated design of swap and settings icon

  • 3.2

    -Bug fixes and performance improvements -Fixed crash when "Share Me" button was tapped on iPad

  • 3.5

    -Bug fixes and performance improvements

  • 3.7

    -Bug fixes and performance improvements

  • 3.8

    -Added App Privacy Requirements -Screen Resolution support for iPhone 12 series

  • 9.7

    Added many more conversion units and categories Search all units Favorites Fractions Compound units, such as: ft-in Remove or add units on main screen Calculator Dark or Light mode

  • 9.8

    Fixed decimal input for some countries that use comma instead of dot. Added review and share capabilites.

  • 9.9

    Fixed formatting bug in number input Optimized text and icon sizes for smaller displays

Alternatives

Availability by market

Data quality & evidence

Page completeness
Live store listing
Last verified
30 Aug 2026
Sources
App Store

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