# ChangeUnits2 — Lab Grade Unit Conversion Calc > Fast, accurate, offline unit conversion and advanced calculation tool. (iPhone/iPad app by Jack McCormack.) - Source: https://appshunter.io/ios/app/changeunits2/id1661260714 (this page in markdown: same URL + `.md`) - Developer: [Jack McCormack](https://appshunter.io/developer/1658121467) - Category: Utilities, Education - Price: $0.99 (on sale, was $4.99) - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.6 · 17 MB - Languages: English - Released: 2022-12-29 - Data updated: 2026-06-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/changeunits2/id1661260714/reviews.md ## What is ChangeUnits2? Designed by an Engineer from the Semiconductor Industry, ChangeUnits2 is Built for Extreme Speed and Versatility. ChangeUnits2 is Very Fast. ChangeUnits2 is Very Accurate. ChangeUnits2 Fits inside your Pocket and Doesn't Require a Signal. ChangeUnits2 even Knows what Time it will be HERE (in your Current Location) at 7am in Tokyo. ChangeUnits2 is Built for EVERYONE. It has a Button for virtually ANY Unit and is Very Easy to Use. Tap on the Woman Welder on the Right to Launch the Quick Unit Selection Screen. Toggle the "Longform List" / "Engineering List" button to Switch Between 1) a List of Unit Buttons in Shortform Engineering style, or 2) in Longform style for a more Wordy Description. note: this ALSO toggles between Scientific Notation & Standard Decimal Form. Quickly change between Thermal Units of BTUs / Therms / Kwh / kCals / and even Gallons of Gasoline Need even more Significant Figures? Just add Zero's to the end of the number you entered, press "Convert Units" and ChangeUnits2 will do the rest. Use the built in Currency Converter travelCash, travelCash2, travelCash3 and travelCash4 to Easily VISUALIZE ANY Monetary Exchange Rate. Whether the Exchange Rate is in [Dollars : Donuts] or [Donuts : Dollars]....ChangeUnits2 handles it like a Pro! Effortlessly Calculate the Number of Pints of Beer held in a 1/2 Barrel Keg for your Big Football Party. Converting Between Standard and Metric has never been so Easy!! Easily keep track of the Time in Major Cities while you are ANYWHERE in the World!! No signal needed. Use the Globe Buttons to arrange International Meetings.....based on your Preferred Time....or even Theirs. Schedule a meeting at 7am Tokyo time, or 7am Los Angeles time. ConvertUnits2 will help you keep track of time like a Pro. Perform advanced math functions right in the App. It's so easy and convenient! Even exponents, Ln, Log, Prime Numbers and Square Roots. Balance Chemical Equations from ANYWHERE! Now you can bring your Periodic Table of the Elements with You! Thank you, Uncle Sam! Calculate the Minimum Fall Time / Maximum Energies / Maximum Speeds of a Fall from nearly ANY Height. Now you're the real life McGuber! The "Last Values" button Remembers your Last 33 Calculations using "Convert Units" Now you can show Data you compiled right on your iPhone without re-entering the Information. It's so Easy ChangeUnits2 will Change your Life for the Better It's a Science & Engineering Professional's Dream! ## Key features - Extreme speed and accuracy - Offline functionality - Currency exchange converter - Global time zone tracking - Advanced math functions - Chemical equation balancing - Last 33 calculations remembered ## Frequently asked questions about ChangeUnits2 ### What is ChangeUnits2? ChangeUnits2 is a utility app designed for extremely fast and accurate unit conversions. It also includes advanced math functions, currency exchange, and global time zone tracking, all accessible offline. ### How much does ChangeUnits2 cost? ChangeUnits2 is a paid app, available for $0.99. This one-time purchase grants you access to all its features without any additional costs or subscriptions. ### Does ChangeUnits2 have ads? No, ChangeUnits2 is ad-free. You can enjoy a seamless and uninterrupted experience while performing conversions and calculations. ### What devices is ChangeUnits2 compatible with? ChangeUnits2 is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's mobile operating system. ### How often is ChangeUnits2 updated? The latest version of ChangeUnits2 is 3.7, released on April 5, 2026. While specific update frequency isn't detailed, the app is actively maintained. ### What age rating does ChangeUnits2 have? ChangeUnits2 has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content. ### Can ChangeUnits2 perform advanced calculations? Yes, ChangeUnits2 supports advanced math functions including exponents, natural logarithm (Ln), logarithm (Log), prime numbers, and square roots, in addition to unit conversions. ### Does ChangeUnits2 remember previous calculations? Yes, ChangeUnits2 features a 'Last Values' button that remembers your last 33 calculations, allowing you to easily access and display previously compiled data without re-entry. ## Version history (last 5 releases) ### 3.7 — 2026-04-05 -Updated for Mac: Application Window Resizing Response **Improved Response to Window Resizing by User, reducing device workload while increasing reloading speed >>> ChangeUnits2 is the BEST Scientific Units Conversion Calculator!~ ### 3.6 — 2026-01-02 -Updated Age Rating Responses ### 3.5 — 2025-12-26 -ADDED QuickView Temperature Conversion Reference Charts to the Degrees Fahrenheit / Celsius / & Kelvin Decision Engines **Quickly Scan Common Temperature Conversion Values from Freezing to the Boiling Point of Water just by Scrolling Down the Screen To View QuickView Temperature Reference: -> [Enter a Temperature Value] -> [Type "K", "F" or "C" into the UNITS Field] -> [Press CONVERT UNITS] -> [Scroll to Bottom of Screen] **QuickView Consists of 3 Distinct Temperature Conversion Reference Charts: -K -> Kelvin reference: Kelvin -> Fahrenheit -F -> Fahrenheit reference: Fahrenheit -> Celsius -C -> Celsius reference: Celsius -> Fahrenheit >>> ChangeUnits2: is the BEST Scientific Measurement Unit Conversion Reference Money Can Buy!!~ ### 3.4 — 2025-10-10 -Added "MOA" to the Angle Units List -> Minute of Arc -Added "NATO mil" to the Angle Units List -> Similar to milliradian -Added "mrad" to the Angle Units List -> the Popular milliradian unit used in Optics, a.k.a. "mil" -Added "gon" to the Angle Units List -> a.k.a. Gradian, a European Angular Unit -Added "Turns" to the Angle Units List -> An Entire Revolution or Rotation, 360 degrees -Renamed "Slope %" to "% Grade" -> for Better User Identification ** this is the "% Grade" Used by Highway Departments to Mark Steep Mountain Roads & Trails -Added "ANGLE" Section to the Measurement Units List -> Select from Degrees / Radians / % Grade / MOA / & NATO mil >>> ChangeUnits2: is the BEST Scientific Measurement Unit Conversion Reference Money Can Buy!!~ ### 3.3 — 2025-09-15 -UPDATED Density Calculation Page -> [g/mL input] **Added to Calculation Output: [grams / fl oz], [Lbs / fl oz], [grams / Pint], [Lbs / cup], [Lbs / Pint] -> Note: [grams / mL] = [grams / cm3] >>> ChangeUnits2: is the BEST Scientific Measurement Unit Conversion Reference Money Can Buy!!~ ## Apps similar to ChangeUnits2 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Urozetta eSIM](https://appshunter.io/ios/app/urozetta-esim/id1594292599) | — | Free | Utilities | | [System Status Pro: hw monitor](https://appshunter.io/ios/app/system-status-pro-hw-monitor/id401457165) | 4.8 (5,317) | $3.99 | Utilities | | [My SOS Family Emergency Alert](https://appshunter.io/ios/app/my-sos-family-emergency-alert/id1057086897) | 4.4 (291) | Free | Utilities | | [Unit of measurement converter](https://appshunter.io/ios/app/unit-of-measurement-converter/id1377754425) | 4.7 (372) | Free | Utilities | | [SIM Card Status Checker](https://appshunter.io/ios/app/sim-card-status-checker/id1570765076) | 4.7 (881) | Free | Utilities | | [Unit Converter HD.](https://appshunter.io/ios/app/unit-converter-hd/id481973377) | 4.7 (642) | Free | Utilities | ## More apps by Jack McCormack - [BulletCalc3](https://appshunter.io/ios/app/bulletcalc3/id1660120327) - [mortgageCalc2](https://appshunter.io/ios/app/mortgagecalc2/id1660832388) - [TimeDelta3](https://appshunter.io/ios/app/timedelta3/id1662106053) - [WorldFlagsDojo2](https://appshunter.io/ios/app/worldflagsdojo2/id1662374385) - [Cash4Gas](https://appshunter.io/ios/app/cash4gas/id1663543772) All apps by Jack McCormack: https://appshunter.io/developer/1658121467 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*