Everyday
Meta Muse Invite Codes — Get 1B Tokens
Copy a Meta AI Muse invite (referral) code to enter within 48 hours of signing up, or share your own. New codes keep coming in. The token bonus is set by Muse and may change.
Printable Calendar & Planner
Make and print calendars with South Korean public and substitute holidays (confirmed for 2026–2027), plus a weekly study planner and class timetable.
Color Blind Test: Red-Green, Blue-Yellow
A free color vision screening test with dot plates generated fresh each time. Pick the gap in a ring, so no reading is needed. For reference only, not a diagnosis.
Typing Practice
Practice Korean or English typing from home-row drills to long passages and measure speed and accuracy. Records stay in this browser; signed-in users can post to the leaderboard.
Ovulation & Fertile Window Calculator
Enter your last period start and cycle length to see next periods, estimated ovulation and fertile windows on a calendar, using the 14-day luteal method or the rhythm method.
Pregnancy Week & Due Date Calculator
Find how many weeks and days pregnant you are and your due date from your last period, conception date or an ultrasound dating.
Size Converter — Ring, Shoe, Clothing
Convert ring, shoe, clothing and bra sizes between South Korea, US, Japan and EU charts, and measure a ring on screen.
What to Eat — Korean Menu Picker
Pick lunch or dinner from 130 dishes common in South Korea, filtered by soup, spicy or solo-friendly, or spin a wheel.
Personality Type Test (16 Types)
Discover your leanings across 16 MBTI-like types with 40 public-domain research items (IPIP); results show as percentages on four axes. Not the official MBTI.
Online Spirit Level — Phone Bubble Level
Turn your phone into a spirit level using its tilt sensor. Surface and edge modes, flip calibration and mm-per-meter readings. Sensor data stays on your device.
Dog & Cat Age in Human Years
Convert a dog’s or cat’s age to human years by size and species, using veterinary association charts. Estimates only.
Lotto 6/45 Number Generator
Generate 1–10 Lotto 6/45 games with fixed or excluded numbers and odd/even or sum filters, using cryptographic randomness.
Korea Money Gift Envelope Writer
Write traditional South Korea money envelopes for weddings, funerals and first birthdays with the right Hanja phrase and your name in vertical layout, then print.
Korean Address to English
Turn a South Korean road-name address into English and split it into Address Line 1 and 2, City, State and ZIP for overseas shopping and forms. Runs in your browser.
Reaction Time Test
Tap the moment the screen turns green to measure reaction time in ms; five rounds give an average and median compared with the public 273 ms median.
Batch Rename Files
Rename up to 300 files at once with rules, preview every new name and download them as a ZIP. Runs in your browser with no upload.
Packing Checklist
Pick trip length, season and purpose to get a packing list, then tick items off; quantities scale with the number of nights.
Recipe Scaler
Paste an ingredient list and get the amounts rewritten for your serving count; lines without a number are left untouched.
Korean Word Chain Game
Play the Korean word chain game against the computer or a friend, with words checked against 210,000 nouns from Korea’s Standard Korean Language Dictionary.
Barcode Generator
Create CODE128, EAN-13 and four other barcode types as PNG or SVG, with check-digit validation.
QR Code Generator
Make QR codes for links, Wi-Fi, contacts and more with dot or rounded patterns, your colors, a logo and a “Scan me” frame, saved as PNG or SVG. Each code is scanned back to check it reads.
Spin the Wheel — Random Picker
Add 2–30 options and spin a wheel to pick one fairly, with weighted slices, remove-and-respin and a shareable link.
QR Code Scanner
Read a QR code from a photo or your camera and copy what it holds. Links never open on their own, and the photo is not uploaded.
Multiplication Tables
Study times tables 2–9 (up to 19), hear them read aloud in Korean, practice shuffled quizzes and print worksheets.
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