Comparison

Shift Unit vs Unit Converter for Physics

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

Head to head
About

Shift Unit

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

Highlights
  • 1400+ conversion units
  • 34 categories
  • Light/dark mode support
  • Home widget
  • Apple Watch app
  • Custom keypad with calculator
  • Wikipedia integration
Features
Read full description

Shift Unit is a unit converter designed with usability and numerical precision in mind. It features 1400+ conversion units across 34 categories. It works great in light or dark mode, and as a Home Widget w/ localized number displays. Independent WatchOS app and complications. Operations can be carried out in portrait mode in simple precision (7 significant digits,) or in landscape mode in double precision (14 significant digits.) Conversion formulae use exact definitions of related entities--not approximations. Wikipedia page information can be pulled for categories and conversion units. (Look for info circle.) The custom keypad has a calculator mode, and allows to enter/edit numbers on either side of the conversion. Unit categories include Acceleration, Angle, Area, Bit Rate, Clock, Online Currencies, Data Storage, Area Density, Volumetric Density, Electric Charge, Electric Current, Energy, Volumetric Flow Rate, Force, Frequency, Fuel, Length, Luminance, Lux, Mass Flow Rate, Momentum, Power, Pressure, Radiation Dose, Radioactivity, Radiation Exposure, Speed, Temperature, Temperature Delta, Time, Torque, Typography, Volume, and Weight. Features: - One screen operation minimizing number of gestures - Numbers (digits, decimal/grouping separators, exponent)/time/country names localized to your (or any) region - Current time in 2 out of 439 world cities and see your cities pinned on a flyover map, an educational way of discovering the world through time zones - Weather conditions and forecast for time zone cities - Dedicated accessibility labels and hints for VoiceOver operations - Customizable number entry timeout allowing to enter a new number without having to clear the field. (Turned off when an accessibility feature, e.g. VoiceOver, is on) - Customizable user interface (preferred categories; user interface alignment for left/right-handed entry or 2-thumb operations) - Ability to swap units while keeping initial numerical entry - Category presets for quick change of context, including user preset - Long-press category button to remove, or add a category on the fly - Long-press number field for copy/paste - Paste Mathematical constants (Pi, e, etc.) - Education via Wikipedia pages for categories and conversion units - Currency conversions using online rates - Searchable list of currency rates with possibility to change base rate - Set favorite currencies - Built-in numeric keypad (with calculator mode) to enter numbers on either side of the conversion - Long-press delete key to clear the field in focus - Engineering number format handling - Infinity and negative numbers handling - 7 or 14-digit precision displays (3-digit fractions for currencies) - Searchable list of 1400+ conversion units across 34 categories - On-boarding screens for general operations and for the Currency category (turned off when VoiceOver is on) - Home widget for quick conversions using units selected in the hosting app Happy Conversions!

About

Unit Converter for Physics

Features
Read full description

Unit Converter for Physics: Your Complete Physics Unit Conversion Tool Transform complex physics calculations into simple conversions with Unit Converter for Physics, the ultimate unit conversion application designed specifically for physics students, educators, and professionals. Comprehensive Unit Coverage Unit Converter for Physics offers extensive conversion capabilities across all essential physics quantities: - Length: Convert between meters, kilometers, centimeters, millimeters, micrometers, nanometers, miles, yards, feet, inches, nautical miles - Mass: Easily switch between kilograms, grams, milligrams, metric tons, pounds, ounces, slugs, and specialized maritime units like gross tons. - Time: Convert seconds, minutes, hours, days, weeks, months, years, milliseconds, and microseconds. - Volume: Transform between cubic meters, liters, milliliters, cubic feet, cubic inches, gallons, quarts, pints, fluid ounces, cubic centimeters, and specialized maritime units like gross tonnage. - Area: Convert square meters, square kilometers, hectares, acres, square miles, square feet, square inches, and square yards. - Temperature: Switch between Kelvin, Celsius, and Fahrenheit. - Speed: Convert meters per second, kilometers per hour, miles per hour, feet per second, and nautical units like knots. - Acceleration: Transform between meters per second squared, feet per second squared, standard gravity (g), and Gal units. - Density: Convert kilograms per cubic meter, grams per cubic centimeter, pounds per cubic foot, and more. - Pressure: Switch between pascal, bar, atmosphere, torr, pounds per square inch, and millimeters of mercury. - Force: Convert between newtons, kilonewtons, pound-force, and dyne. - Energy: Transform joules, kilojoules, calories, kilocalories, electron volts, BTUs, foot-pounds, and kilowatt-hours. - Power: Convert watts, kilowatts, megawatts, horsepower, BTU per hour, and foot-pounds per second. - Frequency: Switch between hertz, kilohertz, megahertz, gigahertz, and revolutions per minute. - Angle: Convert degrees, radians, gradians, minutes of arc, and seconds of arc. Educational Features Conversion Factor Display: Understand the mathematical relationship between units with clearly displayed conversion factors, enhancing your learning experience. Complete SI and FPS Systems: Master both International System of Units (SI) and Foot-Pound-Second (FPS) systems with comprehensive conversion options. Maritime Specialized Units: Navigate specialized maritime measurements including nautical miles, knots, and gross tonnage. User-Friendly Design Intuitive interface requiring minimal input to get accurate results Clean, distraction-free layout perfect for academic use convert units anytime, anywhere Unit Converter for Physics is the perfect companion for physics homework, lab reports, research papers, and professional calculations. Download today and transform the way you handle physics unit conversions!

Screenshots

Shift Unit4 screens
Unit Converter for Physics4 screens

Verdict

The call

The clearest difference is in-app purchases: Shift Unit at none against Unit Converter for Physics's 1. Shift Unit also leads on iOS requirement (16.0 vs 18.6). Unit Converter for Physics's advantage is update cadence (every 10 days vs every 2 months). On price, 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 Converter for Physics sells 1 one-off in-app purchase. Shift Unit asks for nothing beyond the download.

UpkeepUpdate frequency

Shift Unit ships an update every 2 months, Unit Converter for Physics every 10 days. The most recent releases landed on September 6, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
Shift Unit versus Unit Converter for Physics: the parameters behind the verdict, then further details
ParameterShift UnitUnit Converter for Physics
PriceFreeFree
Rating5.0 (21 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings21 — better—
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS16.0 — better18.6
Further details — not scored
Size20 MB2 MB
Age rating4+4+
DeveloperDidier BurtonJatuphol Jaturapat

In-app purchases

None

Shift Unit

No in-app purchases

1 purchases

Unit Converter for Physics

One-time1
  • Unlock Solution$0.99

Questions

Is Shift Unit free?
Shift Unit is free to download, with no in-app purchases.
Is Unit Converter for Physics free?
Unit Converter for Physics is free to download, with in-app purchases available.
Do Shift Unit or Unit Converter for Physics have ads?
Neither Shift Unit nor Unit Converter for Physics shows ads.
Which is updated more often, Shift Unit or Unit Converter for Physics?
Shift Unit ships an update every 2 months, and Unit Converter for Physics every 10 days. Most recently, Shift Unit was updated on September 6, 2026 and Unit Converter for Physics on September 19, 2026.

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