when vs Inko

"四次元年表" is a project where users collaborate to build a database that encompasses all historical events, from the origins of the universe to the endless "now", regardless of the field. It aims to accurately display both temporal and spatial distances by making "where" as important as "when".

Inko turns "I should practice speaking" into something you actually do every day. Pick a scene, talk with a friendly AI for just 60 seconds, and the moment you finish, you get a personal lesson note: what you said, and how a native speaker would say it instead. SPEAK FOR 60 SECONDS A DAY • Swipe through immersive, short-video-style scenes and jump straight into a conversation • Open-mic, real-time voice chat. Interrupt, hesitate, think out loud, just like a real call • Stuck? Say it in your own language. Inko understands, rephrases it naturally, and keeps the conversation going GET A LESSON MADE JUST FOR YOU • After every chat, Inko writes a lesson note from YOUR conversation • See "you said this → a native would say this" rewrites, side by side • Replay your own voice and read the full transcript TURN LESSONS INTO YOUR OWN STUDY MATERIAL • Save words, phrases and idioms with one tap • Review them as flashcards and mark the ones you have mastered • Saved phrases come back in tomorrow's conversation, so you actually use them REVIEW WITH YOUR PERSONAL PODCAST • Turn your lesson notes into a two-host review podcast, generated just for you • Listen with subtitles, in the background, on the go LEARN 40+ LANGUAGES • English, Spanish, Korean, Japanese, French, German, Chinese and many more • Explanations in your native language, expressions in your target language YOUR DATA STAYS YOURS • Lesson notes, phrases and recordings are stored on your device • Delete your data, or your whole account, anytime One minute a day is enough. Meet your coach, start talking, and watch your speaking improve. INKO PRO (AUTO-RENEWABLE SUBSCRIPTION) Inko Pro unlocks unlimited conversations, lesson notes, flashcards and review podcasts. • Weekly: $5.99 / 1 week • Monthly: $14.99 / 1 month • Annual: $99.99 / 1 year Prices are in USD and may vary by region; the exact price for your region is shown in the app before you buy. • Payment is charged to your Apple Account at confirmation of purchase. • The subscription renews automatically for the same price and period unless auto-renew is turned off at least 24 hours before the end of the current period. • You can manage or cancel your subscription in your Apple Account settings after purchase. • Any unused portion of a free trial, if offered, is forfeited when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://inkoapp.ai/privacy