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Learning & Reference
313 appsLearning & Reference: Sky & Science
Learning & Reference: Countries & Travel
World data · ViewCountry Calling Code FinderFind the international phone prefix for any country, or search a prefix to see possible countries.World data · ViewCountry Comparison ToolCompare two countries side by side by area, region, currencies, languages, and borders.World data · ViewCountry Currency FinderFind the currency name, code, and symbol used by any country.World data · ViewCountry Fact FinderLook up a country's capital, region, codes, currencies, languages, area, and neighbours.World data · ViewCountry Language FinderSee the listed languages and native country names for any country.World data · ConvertPlus Code DecoderDecode a full Plus Code into its center coordinates and covered area.World data · GeneratePlus Code GeneratorTurn latitude and longitude into a shareable Plus Code that works without a street address.
Learning & Reference: Everyday Checks
Reference · CheckIBAN Checker & FormatterCheck an IBAN's country structure and checksum, then format it into readable groups.Reference · CheckInternational Phone Number CheckerCheck whether an international phone number has a possible and valid shape, then format it clearly.Reference · CheckISBN Checker & ConverterValidate ISBN-10 or ISBN-13, add correct hyphens, and convert between book-number formats.Reference · ViewPhone Number Country FinderFind the likely country and calling code for an international phone number.
Learning & Reference: 3D Chemistry
SVG · Generate3D Atom Color ExplorerLearn the common colors used for carbon, hydrogen, nitrogen, and oxygen atoms.SVG · Generate3D Molecule Viewer for KidsTurn, zoom, and compare familiar molecules in a clear interactive 3D lab.SVG · GenerateCaffeine Molecule 3D ExplorerTurn the 24 atoms in a caffeine molecule and see its two joined rings.SVG · GenerateDNA Base 3D Explorer for KidsMeet adenine, one of the four letter-like bases that help make DNA.SVG · GenerateMolecule Shape Explorer for KidsCompare straight, bent, flat, pyramid, and tetrahedron molecule shapes.SVG · GenerateMolecule Style Switcher for KidsSwitch one molecule between balls, sticks, filled atoms, and simple lines.
Learning & Reference: 8-Bit Learning Arcade
Quiz · CheckFact or Fiction Arcade for KidsRead quick science, math, and everyday statements, choose fact or fiction, and learn from each helper.Text · CheckKindness Combo Maker for KidsLoad a small kindness idea, draw another when it does not fit, and mark the move when it is done.Emoji · CheckPixel Mood Check-In for KidsChoose calm, happy, tired, worried, frustrated, or excited and get one small, safe next step.Text · CheckReading Power-Up Tracker for KidsChoose a text, read for five minutes, notice one idea, and tell or write what happened.Text · CheckScreen Break Timer for KidsChoose a short break, use the large timer, look far away, blink, and return when your eyes and body feel ready.Word data · CheckSpelling Blaster Game for KidsUse a clue and sound-part hint to type useful words, fix mistakes, and fill the word power bar.Text · CheckStudy Level Planner for KidsGather tools, read directions, finish one part, check one answer, and choose what comes next.Number · CheckTimes Table Arcade for KidsPractice friendly times-table questions, get a clear helper after a miss, and fill an 8-bit power bar.Word data · CheckTyping Speed Run for KidsType positive sentences, see live accuracy, and earn points for matching every letter and mark.
Learning & Reference: Accessibility Tools
Learning & Reference: Accessible Reading
Text · CheckHyperlegible Reading Preview for KidsPreview a short passage with distinct letter shapes, large type, and roomy lines.Printable · GenerateLarge-Print Reading Card MakerTurn a short direction, reminder, or fact into a clear large-print card.Text · CheckOpenDyslexic Reading PreviewPreview your own passage in OpenDyslexic and choose the size and spacing you prefer.Text · CheckOpenDyslexic Reading Ruler for KidsHighlight one line, then move the reading ruler up or down through a short passage.Text · CheckSpaced Reading Card Maker for KidsAdjust 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
Interactive chart / CSV / Calendar · ConvertEclipse & Conjunction CalendarMake an astronomy calendar of eclipses, Moon phases and planetary alignments. Search events and check their dates.Interactive chart / CSV / Calendar · ConvertPlanet Visibility ExplorerFind when planets are above your horizon. Compare rise and set times, sky positions and dark hours for your location.Interactive chart / CSV / Calendar · ConvertSatellite Orbit ViewerPlot satellite orbits from your own TLE data. Follow ground tracks and compare height, speed and viewing angles over time.Interactive chart / CSV / Calendar · ConvertSatellite Pass PlannerFind satellite passes above your location using TLE data. See sky paths and estimated light conditions at each peak.
Learning & Reference: Astronomy Services
ZIP / CSV / JSON / PNG · ConvertEphemeris Comparison DeskCompare Sun, Moon and planet positions from two JPL models. Chart their differences and download the positions for your chosen time.ZIP / CSV / JSON / PNG / ICS · ConvertObserving Night PlannerPlan a night of stargazing. Compare target heights, dark hours and distance from the Moon, then export your observing windows.
Learning & Reference: Biological Sequences
FASTA / Alignment · ConvertSequence Alignment ViewerCompare two short DNA sequences. Line up their bases and inspect matches, differences and gaps.FASTA / FASTQ / GenBank · ConvertSequence Format ConverterConvert biological sequence files between supported formats. Choose input and output formats and download the new file.
Learning & Reference: Classroom Helpers
Learning & Reference: Classroom Printables
Learning & Reference: Classroom Supports
Learning & Reference: Classroom Tools
Art · GenerateClassroom Demo Stop-Motion for KidsCapture a fraction model, bridge build, or sorting activity and replay every step for the class.Text · GenerateClassroom Scenario Builder for KidsMake a safe choice story about teamwork, learning, or solving a class problem.Text · GenerateInk Classroom Decision Story for KidsTurn a classroom problem into a coded story with teamwork points.Art · GenerateWhiteboard Stop-Motion Maker for KidsAdd 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
Emoji · CheckClassroom Choice Board for KidsChoose art, music, a book, a game, a ball, or a bike with one clear tap.Emoji · CheckFeelings Communication Board for KidsTap a big face to share happy, sad, angry, worried, tired, or calm feelings.Emoji · CheckNeeds Communication Board for KidsTap a clear picture to ask for a drink, food, help, the bathroom, rest, or a talk.
Learning & Reference: Countries & Cultures
Quiz · CheckCountry Calling Code Finder for KidsType the digits after a plus sign and see which countries use that calling code.Quiz · CheckCountry Facts Explorer for KidsSee a country's flag, capital, continent, languages, money, and calling code.Quiz · CheckWorld Currencies Explorer for KidsPick a currency and see its name, symbol, code, and places that use it.Quiz · CheckWorld Languages Explorer for KidsPick a language, read its local name, and see countries where it is listed.
Learning & Reference: Creative Coding
Art · GenerateTurtle Code Drawing PlaygroundGive a turtle a few simple commands and watch it draw a bright picture one line at a time.Art · GenerateTurtle Coordinate Path BuilderSend the turtle to x and y points and see those coordinates join into a clear path.Art · GenerateTurtle Polygon MakerChoose the number of sides and see how forward steps and equal turns make a polygon.
Learning & Reference: Daylight Tables
Coordinates · CalculateDaylight Comparison ToolCompare daylight length, sunrise, and sunset between two dates at the same location.Coordinates · CalculateMonthly Daylight TableBuild a full month of sunrise, sunset, twilight windows and daylight durations for one place.Coordinates · CalculateWeekly Daylight TableBuild 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
Number · CheckAngle Sketch Lab for KidsDraw and move two rays to explore acute, right, and obtuse angles on a large grid.Number · CheckCoordinate Plane Drawing Tool for KidsUse four quadrants to make a point picture, mark coordinates, or plan a route across a grid.LaTeX · GenerateGeometry Construction Animator for KidsWatch a triangle, hexagon, or set of angles grow from clear construction lines.Number · CheckGeometry Construction Board for KidsMake a shape house, matching halves, or a repeating pattern on a clear square grid.
Learning & Reference: Grammar & Words
Learning & Reference: History Learning
Learning & Reference: Language & Calendars
Text · ConvertBraille Byte DecoderDecode text from eight-dot braille byte patterns. Restore text made with a matching byte encoder; this is not a braille translator.Unicode braille · ConvertBraille Byte EncoderEncode text bytes as eight-dot Unicode braille patterns. This reversible code is not a translation into readable braille.Unicode · ConvertBraille Dot Cell ExplorerExplore the eight dots of a Unicode braille cell. Choose raised dots and see the matching character and byte value.BS / CSV · ConvertNepali Calendar MakerMake a month of Nepali BS dates with corresponding Gregorian dates and weekdays.AD / BS · ConvertNepali Date ConverterConvert a calendar date between Gregorian AD and Nepali Bikram Sambat BS, with English and Nepali output.Text · ConvertPhonetic Spelling HelperSpell names, reference numbers, and short messages with the NATO phonetic alphabet.Text · ConvertRadio Spelling PracticePractise NATO phonetic code words with a scored quiz, immediate feedback, and downloadable results.
Learning & Reference: Language & Words
Learning & Reference: Learn to Code
Learning & Reference: Learning Quests
Text · CheckChore Level-Up Chart for KidsCheck off a few useful home jobs, add your own chore, and watch a simple hero level grow.Text · CheckClassroom Team Quest Board for KidsTrack shared jobs for taking turns, hearing every voice, finishing a goal, and cleaning the team space.Text · CheckConfidence Shield Builder for KidsBuild a short reminder from a strength, helpful thought, next move, and shield symbol.Text · CheckDaily Kindness Quest for KidsPick a safe, free kindness idea for an ordinary day and celebrate when the small quest is done.Text · CheckHealthy Habit Hero for KidsTrack water, enjoyable movement, helpful food, and sleep preparation without chasing perfection.Text · CheckHomework Quest Board for KidsBreak homework into clear missions, finish one step at a time, and build a simple experience bar.Number · CheckMath Monster Battle for KidsSolve addition, subtraction, multiplication, division, and halving puzzles to fill a victory bar.Text · CheckReading Adventure Timer for KidsChoose a five, ten, fifteen, or twenty minute reading quest and track one calm session.