Practice tenses by speaking
Testify in the right English tense. The Bureau judges your case and hands you a comic to prove it — or bust your alibi.
You've been placed at the scene of an absurd crime — a dragon in the kitchen, a time-traveling janitor — and the Temporal Witness Bureau wants your testimony. Speak or type your alibi in the tense they demand. They'll grade every statement, deliver a verdict, and draw you a comic of exactly what happened.
Alibi turns English grammar into a daily detective story. Every day, a new Case File lands on your desk - absurd fictional crimes, impossible suspects, and one very unimpressed cat detective named Milo. Your job: give your testimony in the exact tense the Bureau demands. Voice it or type it. Then wait for the verdict.
This is not a flashcard app. There are no green checkmarks after every sentence. No streaks broken by a single typo. You give all your statements, the Temporal Witness Bureau evaluates everything at once, and you get a verdict: ALIBI HOLDS, ALIBI QUESTIONED, or ALIBI BROKEN.
Then you see exactly why.
SPEAK YOUR TESTIMONY
Voice-first input means you practice the way language actually works - out loud, under (fictional) pressure, without stopping to tap multiple-choice bubbles.
THE BUREAU DECIDES ALL AT ONCE
No inline corrections. No interruptions. Say all your statements, then get a full AI-powered report with grammar diffs showing exactly what you said vs. what the Bureau expected.
A NEW CASE EVERY DAY
68+ Case Files in the archive. Each one targets a specific tense - present perfect, past continuous, future conditional, and 9 others. Rotating daily so the Bureau never runs out of questions.
YOUR VERDICT IN 4 PANELS
Every interrogation ends with a shareable 4-panel comic strip. ALIBI HOLDS? Milo sighs and lets you go. ALIBI BROKEN? The comic tells that story too.
THE 12-TENSE ATLAS
Every English tense, mapped. Formula, usage, and example sentences - organized the way grammarians wish textbooks were. Reference it before your next testimony.
KEEP YOUR RECORD CLEAN
Daily streaks. Tense-by-tense progress. The Bureau keeps records of everything. So does Milo.
WHO THIS IS FOR
You've studied English before. Maybe for years. But something about tenses still trips you up - you second-guess yourself mid-sentence, you know the rule but freeze when it's time to use it. Alibi fixes that by making you actually use the tense, in context, under the mild bureaucratic pressure of a fictional detective agency.
A2 to C1. Beginners will be gently corrected. Advanced learners will find edge cases that would embarrass a textbook.
WHAT MILO THINKS
Milo is the Temporal Witness Bureau's chief investigator. He is a black cat in a suit. He has seen everything. He is not easily impressed. He will review your testimony with the energy of someone who had already made up his mind before you walked in. He is, however, fair.
If your grammar is clean, he'll let you go. He won't smile about it. But he'll let you go.
Download Alibi. Report for interrogation. Clear your name.
The Bureau is waiting.
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