Comparison

US Unit Converter vs US Units Guide

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

Head to head
About

US Unit Converter

Easily convert between US customary units and the International System of Units for various measurements like length, weight, area, volume, and temperature. Access conversion history and remove ads with a premium upgrade.

Highlights
  • Length conversion
  • Weight conversion
  • Area conversion
  • Liquid volume conversion
  • Temperature conversion
  • Conversion history
  • Ad-free option
Features
Read full description

"US Unit Converter" converts the units of length, weight, area, liquid volume, and temperature used in the United States into the International System of Units such as meters and kilograms. Select the category of the unit you want to convert at the top of the screen, enter the value, and you can convert immediately. The units that can be converted are as follows. [Unit of length] Meters [m], centimeters [cm], millimeters [mm], kilometers [km], inches [in], feet [ft], yards [yd], miles [mile] [Unit of weight] Kilogram [kg], gram [g], pound [lb], ounce [oz] [Unit of area] Square meters [m2], Are [a], hectares [ha], square kilometers [km2], square feet [ft2], square inches [in2], square miles [mi2], acres [acre], square yards [yd2] [Unit of liquid volume] Litre [L], milliliter [ml], fluid ounce [fl oz], cup [cup], pint [pt], quart [qt], gallon [gal] [Temperature unit] Celsius [℃], Fahrenheit [℉] In the free version, you can see only the previous data in the conversion history. If you want to see 100 historical data or hide ads, please consider purchasing the premium version in the app. ---------------------- Terms of Service and Privacy Policy: https://akikibai-labolatory.jimdofree.com/privacy-policy/

About

US Units Guide

Features
Read full description

US Units Guide helps metric-system users understand US customary measurements in everyday American life. Use it when you see Fahrenheit weather, feet and inches, pounds, miles, gallons, MPG, tire pressure, grocery prices, fuel prices, housing area, US recipes, or parcel weights. Core tools: - Weather: Fahrenheit and Celsius - Height and weight: ft/in, cm, lb, kg - Distance, speed, fuel economy, tire pressure, and fuel price - Home area, grocery price, kitchen volume, and parcel weight - Reverse conversion when you need to go from metric back to US units The app is built for practical daily use, not a giant scientific unit encyclopedia. Your language, region, history, text size, appearance, and exchange-rate choices are stored on your device. No account is required, and this version does not include third-party advertising or cross-app tracking.

Screenshots

US Unit Converter4 screens
US Units Guide4 screens

Verdict

The call

The clearest difference is ads: US Units Guide at none against US Unit Converter's shown. US Units Guide also leads on update cadence (monthly vs every 6 months). US Unit Converter's advantage is iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support 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. US Unit Converter sells 1 one-off in-app purchase and US Units Guide sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

US Unit Converter ships an update every 6 months, US Units Guide monthly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
US Unit Converter versus US Units Guide: the parameters behind the verdict, then further details
ParameterUS Unit ConverterUS Units Guide
PriceFreeFree
Rating4.8 (110 ratings) — better—
Positive reviews44.4% of reviews—
Number of ratings110 — better—
Update frequencyEvery 6 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB3 MB
Age rating4+4+
DeveloperKei SuefujiBOTONG BAO

In-app purchases

1 purchases

US Unit Converter

One-time1
  • PREMIUM$3.99
3 purchases

US Units Guide

One-time3
  • Found it useful$0.99
  • Support maintenance$2.99
  • Keep it going$4.99

Questions

Is US Unit Converter free?
US Unit Converter is free to download, with in-app purchases available.
Is US Units Guide free?
US Units Guide is free to download, with in-app purchases available.
Do US Unit Converter or US Units Guide have ads?
US Unit Converter shows ads; US Units Guide does not.
Which is updated more often, US Unit Converter or US Units Guide?
US Unit Converter ships an update every 6 months, and US Units Guide monthly. Most recently, US Unit Converter was updated on November 7, 2026 and US Units Guide on October 31, 2026.

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