We're the team behind Flips, a flashcard app built around the idea of showing you a word right before you forget it. One thing we hear constantly is: “I studied so hard yesterday, and today it's already gone. Do I just have a bad memory?”
Let's get one thing out of the way first: forgetting what you just learned doesn't mean your memory is weak. It's simply how the human brain is wired. The real problem isn't the forgetting itself — it's not knowing how forgetting works, and then trying to study in a way that fights against it. In this article we'll explain why you forget so quickly, and then share how to review with forgetting built into the plan.
You start forgetting the moment you learn — and fast
In the 19th century, the psychologist Ebbinghaus measured how quickly people forget newly learned information. The result is the famous “forgetting curve”: information with little meaningful connection drops away sharply right after you learn it, and within a day most of it can no longer be recalled.
So forgetting a word the next day isn't a failure or a defect — it's a normal brain response. Out of the flood of information you take in every day, your brain throws away whatever it judges to be “unused, so unimportant.” A word you saw once stays filed under “not important,” which is exactly why it gets dropped without mercy.
Don't try to “not forget” — recall it just before you do
At this point most people respond by trying to “study harder” or “read it again and again so I don't forget” — fighting the forgetting head-on. But re-reading something right after you learned it does little, because your brain still remembers it and never gets the signal that it matters. Lots of effort, little payoff — and that's the number one reason people burn out.
Flip the approach. The strongest signal you can send your brain that “this information matters” is to recall it again just as it's starting to fade. Retrieving something you've half-forgotten takes effort, and that effort is the cue that says, “I'll need this repeatedly.” Don't try to prevent forgetting — aim for the moment it's slipping and pull it back. That's the heart of learning with forgetting in mind.
The right move is to widen the gaps between reviews
So when should you recall it? The “about to forget” moment keeps moving later with each successful review. A word you just learned is fading by the next day, but once you've recalled it solidly, it'll take several days before it starts to slip again.
That's why it makes sense to widen your review gaps gradually: the next day → a few days later → a week → a month. This is called spaced repetition, and it's known as the way to make memories last with the fewest reviews. You don't need to go over every word every day. You just need to recall the words that are starting to fade, at the right moment.
The hard part: you can't track that moment by hand
Even once you understand the theory, reality gets in the way. Every word fades at a different time, and tracking “this one was learned three days ago so review today, that one was last week so next week…” across hundreds of words by hand is basically impossible. So people end up either reviewing everything every day (inefficient) or studying only when they feel like it (random timing) — and never really get the forgetting curve working for them.
We built Flips precisely because we wanted this “when to review” problem handled automatically, so you don't have to. Based on Ebbinghaus's forgetting curve, Flips calculates the next ideal review time for each individual word. Words you get right get longer intervals; words you miss or feel unsure about come back sooner. You just answer the words as they appear, and spaced repetition aimed at the “about to forget” moment runs on its own.
The way you answer is built around recall, too. In Card Mode you hide the answer, recall it, then flip; in Quiz Mode you answer from four choices — both make you pull the answer from your own head (active recall) instead of just feeling like you know it. Decks for English, Spanish, Chinese and more are built in, and you can also create your own.
Forgetting isn't your fault. Accept that you'll forget, then make sure you recall things just as they start to slip — and let Flips take over the most tedious part of that for you.
Flips
The flashcard app that shows you words right before you forget them. Review timing managed automatically by the forgetting curve. Free to start.
Learn more about FlipsFrequently Asked Questions
Does forgetting things quickly mean I have a bad memory?
No. Forgetting sharply right after learning is normal brain behavior, exactly as the forgetting curve shows. Your brain discards information it judges to be unused. It's not a difference in memory ability — it's whether you recall things before they fade.
Should I just re-read words over and over so I don't forget?
Re-reading right after learning does little, because your brain still remembers it. Recalling a word once it's started to fade strengthens the memory far more. The number of times you recall matters more than the number of times you read.
How should I set my review intervals?
A rough guide is the next day, then a few days, a week, and a month — widening the gap each time (spaced repetition). The more solidly you've recalled a word, the longer it takes to fade, so widening is fine. If tracking each word is too much, let an app handle it.
Do I need to review every word every day?
No. Reviewing words you already know well every day wastes time. What matters is recalling the words that are fading right now. Flips selects those automatically and shows them to you.