About SpellingIQ

Somewhere between the red squiggly line and the phone that finishes your words, most of us quietly stopped knowing how to spell. Autocorrect made us soft. SpellingIQ is the gym: you hear a word, you type it with no safety net, and you find out where you actually stand.

Your SpellingIQ is a single number on a scale running from 300 to 2200. It rises when you spell words correctly and falls when you don't, weighted by how hard each word is, the way chess ratings and ranked games work. It's a skill rating, not a clinical measure or an IQ test, but it's an honest one, and it's surprisingly hard to fake. Most adults first place somewhere around 900–1200. The full method, including how word difficulty is learned and how sure the number is, is on the methodology page.

Every day there's one shared puzzle per level: five words, the same five for everyone playing at your level, drawn from a curated corpus. About one minute, no signup required. Streaks are kept, results are shareable, and yesterday's excuses don't carry over.

Every word is spoken, and you can play it again or play it slower as often as you like, so the question never depends on reading. The colour-coded letter reveal carries text alternatives for screen readers and for anyone who cannot tell the hues apart, and the grade, the tally and the corrected spelling are announced as they land. Animation follows your system's reduced-motion setting, and there is a switch in Settings if you want it off regardless. When a test ends, focus moves to the result so keyboard and screen-reader players hear the number. We have not yet run a formal accessibility audit; if something is hard to use, email hello@spellingiq.com and we will fix it.

American English is the canonical spelling. Common variants such as "colour," "organise" and friends are accepted where reasonable, because the point is knowing the word, not winning an argument about the Atlantic.

SpellingIQ is an independent project built around one idea: spelling is a skill you can train, not a talent you either have or don't. What started as a frustration with autocorrect grew into a daily training system: adaptive audio tests, spaced-repetition review, and a corpus of words chosen for the specific ways English trips people up.

Want to say hello, report a wrong definition, or dispute a word? Email hello@spellingiq.com.

Play today's Daily Five, take the full SpellingIQ assessment, or make your own spelling list from the words you actually need. There is no app-store app; install SpellingIQ from your browser instead.

The free spelling test · spelling bee practice · spelling practice for adults · the daily spelling game · the hardest words to spell · curated spelling lists · spelling traps and origins, rule by rule.

Curious what the research actually says? Start at the Learn section: how people learn to spell, what makes spelling practice work, where English spelling comes from and spelling and digital learning, all with references. Where we stand on it is on the philosophy page, and how the score itself is measured is on the methodology page.