c. 10,000 BCE — present
Learn history a few minutes a day, on iPhone.
Every era and every lesson. All ten question types. Boss battles and daily challenges. The full collection and timeline. Spaced review of everything you get wrong. Works completely offline. There is nothing to buy and there are no ads.
Short lessons that turn into a habit. You answer questions, you build a streak, and the things you get wrong come back on a spaced schedule until they stick. Ancient Egypt, Rome, the medieval world and Ireland are in the app today, with more eras to follow.
Every question, collectible card and timeline entry names its source, and you can read the full list inside the app. Where historians genuinely disagree about a date or an interpretation, Chronos says so rather than picking one and presenting it as settled. If you find something wrong, tell us and it is corrected in the next content update.
No account, no email, no ads, no third-party SDKs. Your progress lives on your phone. The app keeps a small analytics log that never leaves the device, and you can read every line of it in Settings, or switch it off. Full privacy policy.