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Learning & Reference
313 appsLearning & Reference: Handwriting Practice
Learning & Reference: Music Learning
Audio · GenerateArpeggio Direction Explorer for KidsCompare an arpeggio that climbs, falls, or makes wide jumps.Audio · GenerateArpeggio Pattern Player for KidsBreak a chord into single notes and compare playful note patterns.Audio · GenerateCall-and-Response Melody Maker for KidsHear four call notes, then make four notes that answer them.Audio · GenerateChord Strum Explorer for KidsHear one chord from low to high, high to low, or all together.Audio · GenerateEasy Melody PracticeFollow a short row of notes and practice a tiny song at your own speed.Audio · GenerateInstrument Family Sampler for KidsHear keys, strings, brass, and woodwinds side by side with big sound cards.Audio · GenerateInstrument Range Explorer for KidsChoose an instrument and hear three notes across its useful pitch range.Audio · GenerateMajor and Minor Chord Listener for KidsPick a starting note and hear how major and minor chords differ.Audio · GenerateMajor Scale Piano Step Trainer for KidsPlay C, G, or F major one correct step at a time on the touch piano.Audio · GenerateMelody Pitch Transposer for KidsShift every note in a local melody by the same amount while its rhythm stays steady.Audio · GenerateNote Length Listener for KidsHear the same sampled instrument play a short, medium, and long note.Audio · GenerateOctave Pitch Shift Explorer for KidsHear exactly what one octave down, one octave up, and a wide jump sound like.Audio · GeneratePiano Chord Shape Trainer for KidsBuild clear major and minor chord shapes by finding all three piano notes.Audio · GeneratePiano Note Frequency FinderTap any piano key to see its note name and frequency in hertz.Audio · GeneratePiano Note Name Practice for KidsSee a note name like C4 or F sharp, then find it on the touch piano.Audio · GeneratePitch Up-or-Down Listener for KidsHear an original and changed sound take turns, then listen for the direction.Audio · GenerateSemitone Pitch Step Explorer for KidsMove a sound one, three, or five keyboard steps and see its exact pitch factor.Audio · GenerateSight-Reading Piano Practice for KidsLook at one clear staff note, then find and play it on the piano.Audio · GenerateSoft and Loud Instrument Listener for KidsCompare one instrument played softly, in the middle, and strongly.
Learning & Reference: Science Labs
Simulation · GenerateBall Drop Physics LabDrop bright balls onto ramps and see how gravity guides every roll and bounce.SVG · GenerateCommon Molecule Explorer for KidsExplore the shapes behind caffeine, sugar, aspirin, vitamin C, and more.SVG · GenerateMolecular Formula FinderDraw a molecule from SMILES and find its molecular formula in one clear step.SVG · GenerateMolecule Coloring Page MakerMake a clean black-and-white molecule picture to print, trace, or color.SVG · GenerateMolecule Structure DrawerTurn a short chemistry code into a clear picture of atoms and bonds.
Learning & Reference: Feelings & Emoji
Emoji · GenerateEmoji Check-In MakerMake a simple set of emoji choices for a classroom, family, or team check-in.Emoji · CheckEmoji Mood MeterChoose an emoji and see whether it usually feels sunny, mixed, or tough.Emoji · ViewFeelings Emoji SorterSort emoji into sunny, mixed, and tough feeling groups.
Learning & Reference: Emoji Word Play
Learning & Reference: Citations & Research
Learning & Reference: Culture & Dates
Reference · ConvertChinese Lunar Date ConverterTurn a Gregorian date into its Chinese lunar date, zodiac year, and solar term.Reference · ViewChinese Zodiac FinderFind the Chinese zodiac animal and traditional year name for any birthday.Reference · CalculatePrayer Times CalculatorCalculate daily Islamic prayer times from a date, location, and trusted calculation method.Reference · ViewQibla Direction FinderFind the compass direction toward the Kaaba from any latitude and longitude.
Learning & Reference: Sky & Science
Astronomy · CalculateEquinox & Solstice CalculatorFind the exact equinox and solstice times that mark the four astronomical seasons.Astronomy · CalculateMoon Phase FinderSee the Moon's phase, illumination, and the next four quarter phases for any date.Astronomy · CalculateNext Eclipse FinderFind the next solar and lunar eclipses after any date with their type and peak time.Astronomy · CalculateSunrise & Sunset CalculatorCalculate sunrise, sunset, and daylight length from a date and coordinates.
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.