GUTCalc Physics Unit Converter vs BoltBox

GUTCalc is a calculator that understands units. Enter a free-form expression consisting of arithmetic, SI and non-SI units, physical constants (like Planck's constant h or the speed of light c), and functions (like exp, arctan, and cosh) and GUTCalc will work out the answer including any necessary conversions. Natural units are fully supported, and are great for calculations in particle physics and quantum field theory. SI mode is perfect for quick and easy calculations of everyday quantities. FEATURES: * Choose from SI and three types of Natural unit modes. In Natural unit mode, various physical constants (such as hbar, c, kb, and eps0) are set to 1. GUTCalc automatically inserts factors of these constants to perform conversions and calculations in Natural units. * Gaussian CGS (dynes, ergs, esus, and statvolts) and Planck (quantum gravity) units are also supported. * Multiplication is implied: no need to insert *s everywhere. * Custom-designed keyboards for quick and easy input of common units, constants, and functions---or switch to the built-in keyboard for free-form input. * Calculations can extend over many orders of magnitude without overflow. Need to calculate exp(10000)? No problem. (Available on iOS 11+ and 64-bit devices running iOS 10) * Avoid algebraic errors thanks to GUTCalc's unit checking: inconsistent calculations are flagged in red with an explanatory message. * Share your results via email or save them in a note using the share feature. * Physical constants are updated to the latest values recommended by the Particle Data Group 2020 review, CODATA 2018, and the 2019 redefinition of SI base units. * Suggestions for features and additional constants are welcome. UPGRADE TO PRO FOR EXTRA FEATURES: * Create and manage multiple notebooks to keep your calculations organized * Sync notebooks with iCloud across multiple devices, including the macOS version of GUTCalc * Share notebooks with collaborators * Support the development of more pro features in the future

60+ everyday tools in one fast, simple app. Calculate, convert, scan, record and focus without hunting for a separate app for every small job. SCAN AND CREATE • QR code scanner and QR code generator • Document scanner and photos to PDF • Copy text from any photo (OCR) CALCULATE AND CONVERT • Tip, discount, percentage, VAT, loan, BMI and age calculators • Currency, length, weight, volume, temperature, data and power converters • Date calculator and shipping size calculator PHOTOS • Remove a photo background in seconds • Resize images, add a watermark, split a picture into a grid • Pick colors, build palettes and view photo metadata TEXT AND DEVELOPER TOOLS • Word counter, case converter, text cleaner, sorter and comparator • JSON formatter, regex tester, Base64, URL encoder, hash generator, Lorem Ipsum SOUND AND MEASURE • Voice recorder, text to speech, white noise and tone generator • Metronome, tap tempo and instrument tuner • Compass, decibel meter and frequency meter FOCUS AND TIME • Pomodoro focus timer with Live Activity on your Lock Screen and Dynamic Island • Stopwatch, world clock and habit tracker MADE TO BE QUICK • Mark favorites and open them from a Home Screen or Lock Screen widget • Siri and Shortcuts support for the tools you use most • Clean design, light and dark mode BoltBox is free to start. BoltBox Pro is an optional auto-renewing subscription that unlocks the premium tools. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/