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Learning & Reference
313 appsLearning & Reference: Science Labs
Learning & Reference: Feelings & Emoji
Learning & Reference: Emoji Word Play
Learning & Reference: Citations & Research
Learning & Reference: Culture & Dates
Chinese Lunar Date Converter
Turn a Gregorian date into its Chinese lunar date, zodiac year, and solar term.
Chinese Zodiac Finder
Find the Chinese zodiac animal and traditional year name for any birthday.
Prayer Times Calculator
Calculate daily Islamic prayer times from a date, location, and trusted calculation method.
Qibla Direction Finder
Find the compass direction toward the Kaaba from any latitude and longitude.
Learning & Reference: Sky & Science
Equinox & Solstice Calculator
Find the exact equinox and solstice times that mark the four astronomical seasons.
Moon Phase Finder
See the Moon's phase, illumination, and the next four quarter phases for any date.
Next Eclipse Finder
Find the next solar and lunar eclipses after any date with their type and peak time.
Sunrise & Sunset Calculator
Calculate sunrise, sunset, and daylight length from a date and coordinates.
Learning & Reference: Countries & Travel
Country Calling Code Finder
Find the international phone prefix for any country, or search a prefix to see possible countries.
Country Comparison Tool
Compare two countries side by side by area, region, currencies, languages, and borders.
Country Currency Finder
Find the currency name, code, and symbol used by any country.
Country Fact Finder
Look up a country's capital, region, codes, currencies, languages, area, and neighbours.
Country Language Finder
See the listed languages and native country names for any country.
Plus Code Decoder
Decode a full Plus Code into its center coordinates and covered area.
Plus Code Generator
Turn latitude and longitude into a shareable Plus Code that works without a street address.
Learning & Reference: Everyday Checks
IBAN Checker & Formatter
Check an IBAN's country structure and checksum, then format it into readable groups.
International Phone Number Checker
Check whether an international phone number has a possible and valid shape, then format it clearly.
ISBN Checker & Converter
Validate ISBN-10 or ISBN-13, add correct hyphens, and convert between book-number formats.
Phone Number Country Finder
Find the likely country and calling code for an international phone number.
Learning & Reference: 3D Chemistry
3D Atom Color Explorer
Learn the common colors used for carbon, hydrogen, nitrogen, and oxygen atoms.
3D Molecule Viewer for Kids
Turn, zoom, and compare familiar molecules in a clear interactive 3D lab.
Caffeine Molecule 3D Explorer
Turn the 24 atoms in a caffeine molecule and see its two joined rings.
DNA Base 3D Explorer for Kids
Meet adenine, one of the four letter-like bases that help make DNA.
Molecule Shape Explorer for Kids
Compare straight, bent, flat, pyramid, and tetrahedron molecule shapes.
Molecule Style Switcher for Kids
Switch one molecule between balls, sticks, filled atoms, and simple lines.
Learning & Reference: 8-Bit Learning Arcade
Fact or Fiction Arcade for Kids
Read quick science, math, and everyday statements, choose fact or fiction, and learn from each helper.
Kindness Combo Maker for Kids
Load a small kindness idea, draw another when it does not fit, and mark the move when it is done.
Pixel Mood Check-In for Kids
Choose calm, happy, tired, worried, frustrated, or excited and get one small, safe next step.
Reading Power-Up Tracker for Kids
Choose a text, read for five minutes, notice one idea, and tell or write what happened.
Screen Break Timer for Kids
Choose a short break, use the large timer, look far away, blink, and return when your eyes and body feel ready.
Spelling Blaster Game for Kids
Use a clue and sound-part hint to type useful words, fix mistakes, and fill the word power bar.
Study Level Planner for Kids
Gather tools, read directions, finish one part, check one answer, and choose what comes next.
Times Table Arcade for Kids
Practice friendly times-table questions, get a clear helper after a miss, and fill an 8-bit power bar.
Typing Speed Run for Kids
Type positive sentences, see live accuracy, and earn points for matching every letter and mark.
Learning & Reference: Accessibility Tools
Learning & Reference: Accessible Reading
Hyperlegible Reading Preview for Kids
Preview a short passage with distinct letter shapes, large type, and roomy lines.
Large-Print Reading Card Maker
Turn a short direction, reminder, or fact into a clear large-print card.
OpenDyslexic Reading Preview
Preview your own passage in OpenDyslexic and choose the size and spacing you prefer.
OpenDyslexic Reading Ruler for Kids
Highlight one line, then move the reading ruler up or down through a short passage.
Spaced Reading Card Maker for Kids
Adjust letter, word, and line spacing to make a reading card that feels comfortable.
Learning & Reference: Animals & Nature
Learning & Reference: Animation Makers
Learning & Reference: Astronomy & Satellites
Eclipse & Conjunction Calendar
Make an astronomy calendar of eclipses, Moon phases and planetary alignments. Search events and check their dates.
Planet Visibility Explorer
Find when planets are above your horizon. Compare rise and set times, sky positions and dark hours for your location.
Satellite Orbit Viewer
Plot satellite orbits from your own TLE data. Follow ground tracks and compare height, speed and viewing angles over time.
Satellite Pass Planner
Find satellite passes above your location using TLE data. See sky paths and estimated light conditions at each peak.
Learning & Reference: Astronomy Services
Ephemeris Comparison Desk
Compare Sun, Moon and planet positions from two JPL models. Chart their differences and download the positions for your chosen time.
Observing Night Planner
Plan a night of stargazing. Compare target heights, dark hours and distance from the Moon, then export your observing windows.
Learning & Reference: Biological Sequences
Learning & Reference: Classroom Helpers
Learning & Reference: Classroom Printables
Learning & Reference: Classroom Supports
Learning & Reference: Classroom Tools
Classroom Demo Stop-Motion for Kids
Capture a fraction model, bridge build, or sorting activity and replay every step for the class.
Classroom Scenario Builder for Kids
Make a safe choice story about teamwork, learning, or solving a class problem.
Ink Classroom Decision Story for Kids
Turn a classroom problem into a coded story with teamwork points.
Whiteboard Stop-Motion Maker for Kids
Add a few marks between pictures to reveal a word, math idea, or map route clearly.
Learning & Reference: Coding Concepts
Learning & Reference: Coding Helpers
Learning & Reference: Comics & Characters
Learning & Reference: Communication
Classroom Choice Board for Kids
Choose art, music, a book, a game, a ball, or a bike with one clear tap.
Feelings Communication Board for Kids
Tap a big face to share happy, sad, angry, worried, tired, or calm feelings.
Needs Communication Board for Kids
Tap a clear picture to ask for a drink, food, help, the bathroom, rest, or a talk.
Learning & Reference: Countries & Cultures
Country Calling Code Finder for Kids
Type the digits after a plus sign and see which countries use that calling code.
Country Facts Explorer for Kids
See a country's flag, capital, continent, languages, money, and calling code.
World Currencies Explorer for Kids
Pick a currency and see its name, symbol, code, and places that use it.
World Languages Explorer for Kids
Pick a language, read its local name, and see countries where it is listed.
Learning & Reference: Creative Coding
Turtle Code Drawing Playground
Give a turtle a few simple commands and watch it draw a bright picture one line at a time.
Turtle Coordinate Path Builder
Send the turtle to x and y points and see those coordinates join into a clear path.
Turtle Polygon Maker
Choose the number of sides and see how forward steps and equal turns make a polygon.
Learning & Reference: Daylight Tables
Daylight Comparison Tool
Compare daylight length, sunrise, and sunset between two dates at the same location.
Monthly Daylight Table
Build a full month of sunrise, sunset, twilight windows and daylight durations for one place.
Weekly Daylight Table
Build a seven-day sunrise, sunset, and daylight table from one starting date.
Learning & Reference: Ear Training
Learning & Reference: Feelings & Friendship
Learning & Reference: Fraction Tools
Learning & Reference: Geometry Tools
Angle Sketch Lab for Kids
Draw and move two rays to explore acute, right, and obtuse angles on a large grid.
Coordinate Plane Drawing Tool for Kids
Use four quadrants to make a point picture, mark coordinates, or plan a route across a grid.
Geometry Construction Animator for Kids
Watch a triangle, hexagon, or set of angles grow from clear construction lines.
Geometry Construction Board for Kids
Make a shape house, matching halves, or a repeating pattern on a clear square grid.