Comparison

All Unit Conversion vs Conversion Calculator

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

Head to head
About

All Unit Conversion

Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.

Highlights
  • Length conversion
  • Area conversion
  • Volume conversion
  • Mass conversion
  • Time conversion
  • Currency conversion
Features
Read full description

This is a simple and useful free unit converter - Length Converter - Area Converter - Volume Converter - Mass Converter - Time Converter - Digital Storage Converter - Energy Converter - Currency Converter

About

Conversion Calculator

This utility app offers a comprehensive unit conversion tool for various needs, including cooking, travel, and work. It supports over 120 units across 15 categories, with metric and imperial options. The app works offline and allows for customization of displayed decimals and category order.

Highlights
  • 15 categories and 120+ units
  • Metric and imperial conversions
  • Cooking, weight, length, temperature, and more
  • Offline functionality
  • Customizable decimal display
  • Apple Watch app
Features
Read full description

Convert cooking measurements, kg to lbs, feet to meters, Celsius to Fahrenheit and psi to bar in a tap. Conversion Calculator is a fast, clean unit converter for the kitchen, travel, the gym, school and work. COOKING & KITCHEN • Cups, tablespoons, teaspoons, fluid ounces, pints, quarts and gallons • US and imperial (UK) cups, pints and gallons kept separate, so recipes come out right • Grams, ounces and pounds for baking WEIGHT & BODY • kg to lbs, stones, ounces, grams and milligrams LENGTH, AREA & LAND • Feet, inches, meters, cm, miles, km, yards and nautical miles • Square feet, square meters, acres and hectares TEMPERATURE, SPEED & MORE • Celsius, Fahrenheit and Kelvin • km/h, mph, knots and m/s • Energy: calories, kcal, joules and kWh • Data: bytes, KB, MB, GB and TB • Time: seconds to hours PRESSURE, FUEL, POWER & MORE • Pressure: psi, bar, kPa, atm, mmHg and inHg • Fuel economy: mpg (US and UK), L/100 km and km/L • Power: horsepower (hp), kW and watts • Torque: N·m, lbf·ft and kgf·m • Force: newtons, lbf and kgf • Angle: degrees, radians and gradians MADE FOR EVERYDAY USE • 15 categories and 120+ units, metric and imperial • Swap units in one tap and copy the result • Reorder categories so the ones you use are on top, or hide the rest with Pro • Choose how many decimals to show • Apple Watch app for conversions on your wrist • Works offline Converting is free. Pro is an optional one-time purchase.

Screenshots

All Unit Conversion4 screens
Conversion Calculator4 screens

Verdict

The call

All Unit Conversion and Conversion Calculator both sit at 4.8 stars, but that hides the real split: 100% of Conversion Calculator's written reviews are positive against 50% of All Unit Conversion's. Conversion Calculator also leads on ratings volume (165 vs 29) and device support (3 vs 1). All Unit Conversion's advantage is in-app purchases (none vs 1). On price, rating, update cadence and ads 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. Conversion Calculator sells 1 one-off in-app purchase. All Unit Conversion asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for All Unit Conversion against 4.8 for Conversion Calculator. That said, the two scores are not equally well evidenced: Conversion Calculator has 165 ratings behind it against 29, so its average is the more settled of the two. Written reviews are what separate them: 50% of All Unit Conversion's written reviews are positive against 100% of Conversion Calculator's.

UpkeepUpdate frequency

All Unit Conversion ships an update every 2 months, Conversion Calculator every 5 weeks. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

Scorecard5 real differences · 5 level
All Unit Conversion versus Conversion Calculator: the parameters behind the verdict, then further details
ParameterAll Unit ConversionConversion Calculator
PriceFreeFree
Rating4.8 (29 ratings)4.8 (165 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings29165 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS16.6 — better17.0
Further details — not scored
Size22 MB10 MB
Age rating4+4+
DeveloperTiago Do CoutoCollins Cheruiyot

Customer experience

All Unit Conversion

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

Conversion Calculator

All ratings165 ratings
Positive95.8%
Neutral3.0%
Negative1.2%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

All Unit Conversion

No in-app purchases

1 purchases

Conversion Calculator

One-time1
  • Unlimited access forever$8.99

Questions

Is All Unit Conversion free?
All Unit Conversion is free to download, with no in-app purchases.
Is Conversion Calculator free?
Conversion Calculator is free to download, with in-app purchases available.
Which has better reviews, All Unit Conversion or Conversion Calculator?
Conversion Calculator is rated higher. All Unit Conversion averages 4.8 out of 5 from 29 ratings, while Conversion Calculator averages 4.8 from 165 ratings.
Do All Unit Conversion or Conversion Calculator have ads?
Neither All Unit Conversion nor Conversion Calculator shows ads.
Which is updated more often, All Unit Conversion or Conversion Calculator?
All Unit Conversion ships an update every 2 months, and Conversion Calculator every 5 weeks. Most recently, All Unit Conversion was updated on November 2, 2026 and Conversion Calculator on November 8, 2026.

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