Apps and physics simulations by Greenleaf.
Pick any stretch of coast on Earth, and the simulation loads real sea floor and terrain heights for it. Start a wave by hand, or let a fault in the sea floor lift, sink or tilt, and watch the tsunami spread, slow down over shallow water and run up onto land. Place measuring points to follow the water level, draw a profile across the coast, and see how high the water reached and which areas were flooded.
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Weather in a Box shows a slice of landscape from the side, with the atmosphere above it up to 20 km. The sun warms the ground, warm air rises, clouds form and rain or snow falls, and wind over the mountains makes waves and clouds in the lee. Heat or cool the air, add moisture, push the wind and reshape the terrain, then switch to maps of temperature, humidity or wind to see what is going on. A 3D mode shows clouds building over a whole area.
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Every planet is built from tens of thousands of particles of rock and iron that pull on each other with gravity, collide, heat up and splash. Recreate the impact thought to have formed the Moon, try a grazing hit or a head-on collision, or build your own system from empty space. Cut the planets open to see the core and mantle, colour them by temperature or density, and rewind or replay a run from any angle.
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A flight instrument and navigation app for paragliding, paramotoring and ultralight aviation, on Android and iOS. It shows ground speed, altitude and wind on a screen layout you arrange yourself, with maps of airspace, hazards, wind turbines and terrain that can be downloaded before you fly. Plan a route with waypoints, see how the wind affects flight time and fuel, and keep a logbook with upload to Leonardo. A tracking link shows your last known position to others if you do not return.
A fast, two-pane file manager in the style of Total Commander. As an optional extra, you can describe what you want in plain language, and AI turns it into the right action. This is especially handy for searches, batch renames and other tasks that would otherwise need file masks. You always see what it understood and confirm before anything is carried out. It has replaced every other file manager I used, and I haven't missed them.
Natural CalculatorA calculator for Windows where you type maths the way you would write it on paper and press Enter. It handles variables, implicit multiplication such as 2pi or 2(3+1), and a line that starts with an operator carries on from the last result. Expressions can be plotted in a floating graph, and a built-in converter covers currency, length, weight, temperature, volume, speed and area. History, variables and settings are kept between sessions, and nothing leaves your PC.
An intermittent fasting timer for Android and Wear OS that shows what happens in your body while you fast. The dial shows how far you are, which phase you are in and what comes next, and home screen widgets update every minute without opening the app. Charts follow insulin, ketones and growth hormone hour by hour, and each curve links to the studies behind it. There is no account, no ads and no analytics, and Pro is either a Year Pass that never renews or a single Lifetime purchase, so there is nothing to cancel.
Knitting and crochet patterns that adapt to the yarn and needles you already have. Enter your stitch and row gauge and the size you want, and the app works out the numbers and writes clear instructions for that combination. It has a built-in row counter, a size guide, and keeps your patterns and progress on the device. Available in Danish, British English and American English.
