Sharpen your eye for the mistakes that slip past everyone else.

Grammar.Wiki turns copy-editing into a game. Each quiz drops you into a sentence with an error hiding in plain sight — a misplaced apostrophe, a mixed-up "its" and "it's," a comma splice, a dangling modifier. Find it, tap it, and get a clear explanation of exactly why it's wrong (and how to fix it next time).

No lectures. No walls of grammar theory. Just sentence after sentence, building the kind of instinct that comes from catching mistakes yourself.

This is a project of Grammar.Wiki | Visit the site to take your learning further (and contribute!).

WHY GRAMMAR.WIKI

★ Learn by catching, not memorising
Tap the word you think is wrong. Guess again if you miss — the correct answer stays hidden until you find it, so the lesson sticks.

★ A daily challenge worth returning for
One new sentence every day. Solve it (within 3 guesses) and build your streak. Browse the full archive any time to revisit past days.

★ Word & Wisdom
A rotating tip or word-of-the-day greets you on the home screen — a quick, quotable nugget of usage advice before you even start a quiz.

★ Quiz packs for every kind of mistake
Commonly confused words, punctuation pitfalls, tricky homophones, subject-verb agreement, and more — organised into focused packs you can work through at your own pace. Track your average attempts per pack and watch your scores improve.

★ US or UK/AU spelling, your call
Toggle between American and British/Australian spelling conventions, and quizzes adjust automatically — right down to individual words inside example sentences.

★ No accounts, no ads, no clutter
Nothing to sign up for, nothing interrupting your quiz. Your progress lives on your device. Premium packs available soon as one-time unlocks — buy once, keep forever, restore anytime.

WHO IT'S FOR

Students prepping for exams. Writers and editors keeping their skills sharp. Anyone who's ever sent an email and immediately wondered if "affect" or "effect" was the right call. If you enjoy word games, you'll enjoy this — it just happens to make you a better writer along the way.

Built from the same content as Grammar.Wiki, adapted so you can practice anywhere — on the bus, in line, during a coffee break.