Dozecal vs Sun Focus

Dozecal is an educational RPN* calculator to promote the use of Base Twelve in math and science. The usual math functions are available in both DUODECIMAL and DECIMAL modes. Conversion is automatically made when switching from one mode to the other one. Trigonometric operations uses DEGREE as unit of measure. For more information about Base 12, please visit the Dozenal Society of America. * RPN : the Dozecalc calculator uses the Reverse Polish Notation (RPN). This notation seems complex but has many advantages over algebraic notation and is more intuitive once you have understood the idea. The calculator has a stack and any operation that requires two numbers is using the bottom stack layers (X and Y). Key ENTER to push the stack up and separate one number from the next. To perform arithmetic, key in the first number, press ENTER to separate the first number from the second, then key in the second number and then select and operator such as the numerical functions +, -, * or /. The result appears immediately after you press the numerical function key. The operator is keyed in only after both operands are in the stack. Example: calculate 3 + 4 Key sequence: 3 ENTER 4 + Result: 7 The result of any operation may itself become an operand. You do not need to press enter again to use the result. The "7" is already entered. Example: add 2 to the previous result Key sequence: 2 + Result: 9 Example: calculate 5 * (3 + 4) Key sequence: 3 ENTER 4 + 5 * Alternate key sequence: 5 ENTER 3 ENTER 4 + * Disclaimer: results and precision may occasionally be incorrect. Should you report them at johan@unumdesignum.com, and the author will be happy to fix !

Locate the sun wherever you are on Earth, anytime, by any weather. Find out what the sun path is any date, any location on Earth with an intuitive interface. Supports augmented reality (AR) and widgets. Use this app to: • plan your next sunset photo or sunrise photo; • find the time the sun illuminates a specific side of a building (for a photo shoot); • estimate sun exposure when looking for a new property; • which side of the hotel your room should be for your next holidays; • learn more about the sun path in the sky and seasons; • study archaeoastronomical sites and sun-aligned artefacts; • customise your iPhone or iPad screen with widgets. App features: • Augmented reality (AR); • interactive plot and map; • sunrise and sunset times; • Save locations for bookmark and to configure widgets; • summer solstice and winter solstice; • time zones and daylight saving time; • easy sharing: save and send the sun path plot and the map, along with essential information (sunrise, sunset, and link to map); • location lookup by coordinates, reverse geocoding, or name; • curated list of sun-aligned artefacts, archaeoastronomical sites; • multiple windows in iPadOS: view different sites at the same time. Interactive plot and map: • swipe up and down on the plot to change the time of day, or the date; • swipe on the map to change the coordinates; • tap on the date to change mode (date or time); • long press on date to input specific date or choose time zone. Note: Never look at the sun without proper protection.