Comparison

Mercury vs UnitFlow

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

Head to head
About

Mercury

Easily convert temperatures between Celsius, Fahrenheit, and Kelvin with an elegant and intuitive interface. Features dynamic background color changes based on temperature and supports decimal conversions.

Highlights
  • Celsius, Fahrenheit, Kelvin conversion
  • Interactive temperature scrolling
  • Dynamic background color
  • Reset to zero function
  • Decimal temperature support
Features
Read full description

Mercury is the best temperature converter for Celsius, Fahrenheit and Kelvin. Elegant and easy to use. • Convert Celsius, Fahrenheit and Kelvin. • Scroll with your finger to change the current temperature. • Watch as the background color changes while you go hotter or colder. • Reset to zero with a quick tap. • Support for decimal temperature conversion.

About

UnitFlow

Features
Read full description

Convert miles to kilometers, pounds to kg, ounces to grams, and Fahrenheit to Celsius instantly. Perfect for switching between metric and imperial systems and for converting between multiples and submultiples of the same unit. Works completely offline. UnitFlow is ideal for travel, study, and working with international measurements or content from countries using different measurement systems. CONVERSIONS BETWEEN SYSTEMS - Miles ↔ Kilometers - Pounds ↔ Kilograms - Ounces ↔ Grams - Gallons ↔ Liters - Fahrenheit ↔ Celsius - Feet and inches ↔ Centimeters - Miles per hour ↔ km/h - Knots ↔ km/h CONVERSIONS WITHIN THE SAME UNIT Also supports conversions between multiples and submultiples: - Meters, centimeters, millimeters - Kilograms, grams, milligrams - Liters and milliliters - Hours, minutes, seconds FREE CATEGORIES (7) - Length - Weight - Volume - Area - Temperature - Speed - Time PREMIUM CATEGORIES With one-time purchase (no subscription), unlock 7 additional categories: - Pressure (bar, psi, pascal, atmospheres) - Energy (joules, calories, kilowatt-hours) - Voltage (volts, millivolts, kilovolts) - Current (amperes, milliamperes) - Power (watts, kilowatts, horsepower) - Digital Data (bytes, KB, MB, GB, TB) - Data Transfer Rate (bit/s, kbit/s, Mbit/s, Gbit/s) MULTILINGUAL SUPPORT UnitFlow is available in 6 languages: Italian, English, French, German, Spanish, and Japanese. From the developer of CurrencyFlow.

Screenshots

Mercury4 screens
UnitFlow4 screens

Verdict

The call

The clearest difference is ads: Mercury at none against UnitFlow's shown. On price, in-app purchases, device support and iOS requirement 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. Mercury sells 5 one-off in-app purchases and UnitFlow sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Mercury versus UnitFlow: the parameters behind the verdict, then further details
ParameterMercuryUnitFlow
PriceFreeFree
Rating4.0 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 70 months—
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.0 — better26.2
Further details — not scored
Size4 MB15 MB
Age rating4+4+
DeveloperSamuel HerreraAntonio Cetrangolo

In-app purchases

5 purchases

Mercury

One-time5
  • Small Tip$0.99
  • Remove Ads$1.99
  • Medium Tip$2.99
Show 2 more
  • Large Tip$4.99
  • Massive Tip$9.99
1 purchases

UnitFlow

One-time1
  • UnitFlow Premium$2.99

Questions

Is Mercury free?
Mercury is free to download, with in-app purchases available.
Is UnitFlow free?
UnitFlow is free to download, with in-app purchases available.
Do Mercury or UnitFlow have ads?
UnitFlow shows ads; Mercury does not.

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