# Unit Eater — Real Unit Calculator > Advanced calculator for unit conversions and calculations with custom unit support. (iPhone/iPad app by Tom Leon Schmidt.) - Source: https://appshunter.io/ios/app/unit-eater/id6742549723 (this page in markdown: same URL + `.md`) - Developer: [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) - Category: Utilities, Productivity - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 12.0 · 65 MB - Languages: American English, German (Germany) - Released: 2025-03-27 - Data updated: 2026-06-02 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/unit-eater/id6742549723/reviews.md ## What is Unit Eater? 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 ## Key features - Unit conversion and calculation - Custom unit definition - Extensive unit library - Calculation history - Customizable result format - Dark mode ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium - Monthly | $0.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Premium - Pay once | $3.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/unit-eater/id6742549723/reviews.md ### 5/5 — Top *2025-08-24, version 1.0.6* Wollte schon immer so einen Taschenrechner, der Einheiten umrechnen kann ### 5/5 — Einfache Handhabung, tolle Funktionen *2025-05-05, version 1.0.4* Der Taschenrechner lässt sich einfach bedienen und hat tolle Funktionen! Perfekt für meine Arbeit! ## Frequently asked questions about Unit Eater ### What is Unit Eater? Unit Eater is a utility app that functions as a sophisticated calculator. It not only converts units but also allows you to perform calculations directly with them, supporting a wide range of scientific and everyday units. ### Can I add my own units to Unit Eater? Yes, Unit Eater allows you to define your own custom units if your specific needs are not covered by the extensive built-in library. This ensures maximum flexibility for your calculations. ### What kind of units does Unit Eater support? Unit Eater supports a vast array of units across categories like length, area, volume, mass, time, speed, energy, power, pressure, and many more, including prefixes and scientific constants. ### Is Unit Eater suitable for academic use? Absolutely. Unit Eater is perfect for school, university, and work, especially for subjects like math, physics, chemistry, biology, and engineering, due to its robust unit handling and calculation capabilities. ### Does Unit Eater have a history feature? Yes, Unit Eater includes a history of recent calculations. You can quickly transfer parts or entire calculations from this history to use in new computations. ### What platforms is Unit Eater available on? Unit Eater is available on Mac, iPhone, iPad, and iPod, making it accessible across various Apple devices. ### How often is Unit Eater updated? The latest version, 1.0.8, was released on November 21, 2025. Updates are released periodically to improve functionality and add new features. ### Does Unit Eater offer a premium subscription? Yes, Unit Eater offers a 'Premium - Monthly' subscription plan for $0.99 per month, providing access to enhanced features or an ad-free experience. ## Version history (last 5 releases) ### 1.0.8 — 2025-11-21 - Added engineering format for results - Minor improvements and bug fixes ### 1.0.6 — 2025-08-11 - search is now opened automatically on typing with physical keyboard - added option in settings to add a review on App Store ### 1.0.4 — 2025-04-25 - improved selecting functions with cursor ### 1.0.3 — 2025-04-16 - improved keyboard support - improved and added 'Mac designed for iPad' version ### 1.0.2 — 2025-04-12 - added more offers for full access - 'Mac designed for iPad' removed ## Apps similar to Unit Eater | App | Rating | Price | Category | | --- | --- | --- | --- | | [CNVRT: SI Unit Conversion Tool](https://appshunter.io/ios/app/cnvrt-si-unit-conversion-tool/id1607762263) | 4.5 (17) | $4.99 | Utilities | | [ExSciCalc](https://appshunter.io/ios/app/exscicalc/id1625177287) | 5.0 (1) | $1.99 | Utilities | | [GUTCalc Physics Unit Converter](https://appshunter.io/ios/app/gutcalc-physics-unit-converter/id1526914857) | 5.0 (6) | Free | Utilities | | [SFX Calc Premium](https://appshunter.io/ios/app/sfx-calc-premium/id1573567879) | 5.0 (2) | $5.99 | Utilities | | [Better Calc](https://appshunter.io/ios/app/better-calc/id1585689494) | 5.0 (2) | Free | Utilities | | [CalcSmart](https://appshunter.io/ios/app/calcsmart/id6749968296) | 5.0 (3) | $19.99 | Utilities | ## More apps by Tom Leon Schmidt - [Tallyman Tap - Counter Clicker](https://appshunter.io/ios/app/tallyman-tap-counter-clicker/id6748642269) All apps by Tom Leon Schmidt: https://appshunter.io/developer/1634212175 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-02.*