Study guide
Revising with no signal
Most of Hachi runs on your device, which means a bad connection is much less of a problem than it sounds. Here is exactly what stops working.
What is on your device
Reviewers, notes, quiz attempts, scores, streak history and mistake history are all stored in your browser. Quizzes do not contact a server to run, so a reviewer you built last week is still there and still works on a train with no signal.
Hachi also installs as an app. Added to your home screen it opens in its own window, keeps working offline, and gets new versions in the background rather than needing a reinstall.
What genuinely needs a connection
Three things, and it is worth knowing them in advance rather than finding them out mid-journey.
- AI generation. Turning notes or a photo into a reviewer is a call to an outside service, so it needs a connection.
- Sharing. Sending a reviewer to a friend, creating a group, or joining one all go through the server.
- Cloud sync. Signing in keeps everything on your account and across your devices, which only means anything when there is a connection to sync over.
Everything else, including generating questions by hand in the editor, works the same offline as it does online.
What happens when you come back
Work done offline is not lost. It saves locally as you go and syncs to your account the next time the connection is there, so closing the app on a plane does not cost you a session.
If you have never signed in, that work stays on that device and that device only. Clearing your browser data deletes it, which is the single most common way people lose a set of reviewers.
Setting a device up before you leave
Worth doing while you still have a connection, because none of it works once you are out.
- Add Hachi to your home screen so it launches without a browser address bar.
- Open the reviewers you plan to use once, so any first-run work is already done.
- Sign in if you want the session to survive a cleared cache. Generation is the one thing you cannot prepare offline, so download or generate the material before you travel.
Try it
Every technique here works on a reviewer you already have, or on one built from your notes in a couple of minutes. The features page covers how, and the FAQ covers the parts people usually get stuck on.
More guides
- Active recall beats rereading, and you can prove it on yourself
Rereading feels like studying because it is easy and it feels familiar. It is also close to useless on an exam. Here is the difference, and what to do instead.
- A revision schedule you will actually keep
Revising everything the night before is a way of feeling organised. Spacing is what makes it work. Here is a schedule you can keep, including for the nights when it slips.
- Turning a past paper into a reviewer you can revise from
Exam Paper mode transcribes a paper that already exists instead of inventing one. That changes what you can trust, and how you should use it.
- Find the topic you keep getting wrong
An overall percentage hides the one topic that costs you marks every time. Here is how to find it and what to do about it.
- Running a study group that actually turns up
Shared material goes stale fast unless someone owns it. Here is how to share reviewers and groups without ending up with four slightly wrong copies.