EZrr Calculator vs Unit Eater
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Simple interface
- Basic calculations
- Designed for older devices
- Quick utility tool
Read full descriptionHide 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!
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.
- Unit conversion and calculation
- Custom unit definition
- Extensive unit library
- Calculation history
- Customizable result format
- Dark mode
Read full descriptionHide 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
Verdict
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
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.
EZrr Calculator ships an update daily, Unit Eater fortnightly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.
| Parameter | EZrr Calculator | Unit Eater |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Daily — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | EZR Companies LLC | Tom Leon Schmidt |
Customer experience
EZrr Calculator
Unit Eater
In-app purchases
EZrr Calculator
No in-app purchases
Unit Eater
- Premium - Monthly$0.991 Month
- Premium - Pay once$3.99
Questions
Is EZrr Calculator free?
Is Unit Eater free?
Do EZrr Calculator or Unit Eater have ads?
Which is updated more often, EZrr Calculator or Unit Eater?
Other comparisons















