Comparison

EZrr Calculator vs Unit Eater

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

Head to head
About

EZrr Calculator

A straightforward calculator designed for simplicity and older devices. It provides a quick utility for basic calculations when you need a reliable tool.

Highlights
  • Simple interface
  • Basic calculations
  • Designed for older devices
  • Quick utility tool
Features
Read full description

It's just a calculator... We built the calculator for simplicity and for older devices... to give us a quick check utility for those times when our brains are full and unable to make basic calculations. This happened to us a lot. Enjoy!

About

Unit Eater

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

Highlights
  • Unit conversion and calculation
  • Custom unit definition
  • Extensive unit library
  • Calculation history
  • Customizable result format
  • Dark mode
Read full description

Unique calculator that not only converts units, but can also perform calculations with them. Perfect for school, university, work, or personal use! For math, physics, chemistry, biology, engineering, or any other natural sciences! - Standard calculator functions usable with or without units - Target unit freely definable - Define your own units if you need them - History of recent calculations - Quick transfer of parts or entire calculations from history - ANS function to dynamically use the last result - Customizable result format - Quick search - Quick access to important functions like square or cube - Undo and redo of last steps - Dark mode Boost your productivity, focus on the essentials, and leave conversion errors in the past! Supports many units, prefixes, and constants: * Prefixes: kilo, mega, giga, tera, centi, milli, micro, nano, … * Constants: mass of proton, neutron, electron, Avogadro's constant, electric field constant, gas constant, Planck's constant, … * Angles: radian, degree, degree-minute, degree-second, gradian, turn, steradian, … * Length: meter, mile, inch, foot, yard, nautical mile, chain, furlong, cable length, rod, … * Area: square meter, hectare, acre, are, square kilometer, square inch, square foot, square yard, … * Volume: liter, cubic meter, fluid ounce, gallon, gill, pint, quart, barrel, tablespoon, teaspoon, … * Mass: gram, ton, ounce, pound, carat, grain, … * Time: second, minute, hour, day, year, … * Speed: meter per second, kilometer per hour, miles per hour, knot, speed of light, … * Acceleration: gravitational acceleration, meter per second squared, … * Energy: joule, kilocalorie, erg, watt-hour, electronvolt, … * Power: watt, horsepower, … * Force: Newton, pond, kilopond, tf, ozf, lbf, … * Torque: Newton meter, ozfin, ozfft, lbf*in, … * Frequency: Hertz, revolutions per minute, … * Pressure: pascal, bar, atm, at, Torr, mmHg, osi, ose, psi, psf, … * Viscosity: Poise, Stokes, … * Density: gram per cubic centimeter, kg per cubic meter, … * Radiation: Becquerel, Curie, Rutherford, Roentgen, Gray, Sievert, rem, … * Light: candela, lumen, lux * Electricity: volt, ampere, ohm, coulomb, elementary charge, farad, siemens, … * Magnetism: Weber, Tesla, Henry, … Is your desired unit not listed? You can define any additional units! Privacy Policy: https://www.iubenda.com/privacy-policy/22446614 Terms and Conditions: https://www.iubenda.com/terms-and-conditions/22446614

Screenshots

EZrr Calculator2 screens
Unit Eater4 screens

Verdict

The call

The clearest difference is in-app purchases: EZrr Calculator at none against Unit Eater's 2. EZrr Calculator also leads on update cadence (daily vs fortnightly) and iOS requirement (15.0 vs 17.0). On price, review sentiment, ads 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. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. EZrr Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

EZrr Calculator ships an update daily, Unit Eater fortnightly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
EZrr Calculator versus Unit Eater: the parameters behind the verdict, then further details
ParameterEZrr CalculatorUnit Eater
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings3 — better—
Update frequencyDaily — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better17.0
Further details — not scored
Size1 MB47 MB
Age rating4+4+
DeveloperEZR Companies LLCTom Leon Schmidt

Customer experience

EZrr Calculator

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Unit Eater

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EZrr Calculator

No in-app purchases

2 purchases

Unit Eater

Subscriptions1
  • Premium - Monthly$0.991 Month
One-time1
  • Premium - Pay once$3.99

Questions

Is EZrr Calculator free?
EZrr Calculator is free to download, with no in-app purchases.
Is Unit Eater free?
Unit Eater is free to download, with in-app purchases available.
Do EZrr Calculator or Unit Eater have ads?
Neither EZrr Calculator nor Unit Eater shows ads.
Which is updated more often, EZrr Calculator or Unit Eater?
EZrr Calculator ships an update daily, and Unit Eater fortnightly. Most recently, EZrr Calculator was updated on October 30, 2026 and Unit Eater on November 4, 2026.

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