How to actually review your flashcards every day

Spaced repetition only works if the "spaced" part is honoured — a scheduler that plans your next review for Thursday assumes you'll actually show up Thursday. The good news is that showing up doesn't take much: a well-run daily habit and a forgiving system underneath it do most of the work.

Why daily beats occasional, even at the same total time

FSRS spaces reviews out to land right around the point you're about to forget — that's what keeps the review load low while keeping recall high. Skip the day a batch of cards was due, and by the time you get to them their recall odds have already slipped below the target, so more of them come back as Again, which costs more total reviews later than showing up on time would have. Little and often isn't just easier; it's actually less total work over the long run than occasional long sessions.

The 4am cutoff, and why it exists

R3CK0N's flashcards follow the same convention Anki uses: a study day doesn't end at midnight, it ends at 4:00am local time. Study at 1am and you're still inside "today" — the cards you clear count toward today's numbers, and your streak doesn't break. The next study day only starts once 4am has passed.

This matters in two places:

• Due counts. A card scheduled for "tomorrow" becomes due at tomorrow's 4am, not at midnight — so a review card doesn't suddenly appear in your queue in the middle of the night.
• Streaks and "today" in stats. A late-night session and an early-morning one on the same calendar night both belong to the same study day, which is the more useful way to track consistency for anyone who studies after midnight.

A missed day is not a catastrophe

It's tempting to treat a broken streak as if the whole deck has fallen apart. It hasn't. Nothing about FSRS breaks when a review is late — a card that was due yesterday is simply still due today, sitting a little further past its target recall probability than planned. You'll likely see slightly more Again answers on cards that waited, because their odds of recall dropped a bit further than the 90% target intended, and the scheduler responds by tightening their next interval a touch. That's it. No cards are lost, no progress is deleted, and nothing needs to be reset.

The only real cost of a missed day is a slightly bigger queue tomorrow — new cards you'd have introduced today are still waiting, and the cards that were due are now overdue alongside them. Clear it in one sitting if you can, or lower new cards per day for a few days to work the backlog down; see the guide to new cards per day for the math behind that.

Habits that make daily reviews stick

• Attach it to something you already do daily. Right after coffee, right before closing your laptop for the night — reviews piggybacking on an existing habit survive far longer than ones that need their own dedicated slot.
• Start smaller than feels necessary. A habit of "open the app for two minutes" survives busy days that "study for twenty minutes" doesn't. You can always keep going once you're in.
• Let the due count be the finish line. R3CK0N's study screen shows how many learning, review and new cards are left. "Done" has a clear definition — clearing it — rather than an open-ended amount of time.
• Look at your streak, not just today. The calendar heatmap in Flashcards' stats shows every day you've studied. A visible streak is one of the more reliable ways to keep a daily habit from quietly lapsing.
• Let a reminder cover the days your habit doesn't fire. Habits are the main mechanism; a nudge is the backstop for the day you forget.

A daily reminder email

If you create an account and sign in, you can turn on a reminder email from your Flashcards settings — daily or weekly, at whatever local hour suits you. It tells you plainly how many cards are due today (or says you're all caught up), scoped to specific decks if you only want a nudge about one of them. It uses the same 4am study-day boundary as everything else, and every email carries a one-click unsubscribe if you decide you'd rather rely on the habit alone.

Coming back after a longer gap

A missed day is easy to shrug off; a missed week or month feels harder to face, and that feeling is usually worse than the actual queue waiting for you. The math doesn't change with the length of the gap — every card is still exactly where it was, just further past its target recall probability, and the fix is the same regardless of whether it's been one day or thirty: open the deck, work through what's due, and let the scheduler adjust from there. There's no "too late" state a deck can enter, and no reason to start over from scratch rather than simply resuming.

If the backlog genuinely feels too large to face in one sitting, it's fine to split it — clear the oldest overdue reviews first over a few days, and temporarily lower new cards per day (or pause new cards entirely) until the backlog is back under control. See the new-cards-per-day guide for how that limit interacts with a growing queue.

Frequently asked questions

Will I lose my streak if I study at 2am?

No. Anything before 4am local time still counts as the previous study day, so a late night doesn't cost you a day.

What happens to cards I never got to?

They stay in the queue, overdue, until you review them. Nothing is deleted or skipped for you.

Do I need an account to build a habit around this?

No — the streak calendar and due counts work fully offline in your browser. An account only adds the reminder email and syncing across devices.