We're the team behind Flips, a flashcard app built on the forgetting curve. One question we get asked a lot is simple but real: “Paper flashcards or an app — which one actually helps me remember more?” It's a fair question. Paper has worked for generations, and there's something satisfying about a stack of cards you wrote yourself. So let's compare the two honestly, without pretending paper has no place.
The short version: both can work, but they're strong in different ways. The deciding factor usually isn't the material — it's whether the method helps you review at the right time and focus on the words you keep getting wrong. Let's break it down.
Where paper still wins
Let's give paper its due. Writing a card by hand is itself a memory act — the slower pace, the physical movement, and the choices you make about what to put on the card all help the information sink in a little deeper. There's no battery, no notifications pulling your attention elsewhere, and you can spread a deck out on a desk to see everything at once. For a small set of cards you're actively building, paper feels good and works fine.
The trouble starts as the deck grows. With a hundred or more cards, the very strengths of paper turn into chores: you have to carry the stack, shuffle it, and somehow remember which cards you've already nailed and which still trip you up. That bookkeeping is exactly where most paper systems quietly fall apart.
A head-to-head comparison
Here's how the two stack up on the things that actually decide whether a word sticks. Note that the “app” column describes a spaced-repetition app like Flips, not just a digital version of a paper deck.
| What matters | Paper | SRS app |
|---|---|---|
| When to review | You decide by feel | Scheduled per word by the forgetting curve |
| Focusing on weak words | Manual sorting | Missed words come back sooner, automatically |
| Portability | Carry the stack | Always in your pocket |
| The act of writing | Strong — you write each card | Lighter, but you still type your own decks |
| Recall practice | Flip to check | Card and quiz modes both force active recall |
Read that table and a pattern jumps out. Paper holds its own on the input side — writing cards is genuinely useful. But on the review side, it leaves everything up to you: when to come back, which cards to drill, what to skip. An app's real advantage isn't being digital; it's automating the “when” and the “which” so your effort lands on the words that need it.
Why the “when” is the part an app should handle
Memory fades on a curve, and every word fades on its own timeline. Reviewing a whole paper deck every day wastes time on words you already own, while reviewing only when you feel like it means weak words slip through. Tracking the ideal moment for hundreds of cards by hand is, realistically, impossible — which is the exact gap a spaced-repetition app fills.
That's why we built Flips. Based on Ebbinghaus's forgetting curve, it 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 — in Card Mode you hide the answer, recall it, then flip; in Quiz Mode you pick from four choices for instant feedback. Both make you pull the answer from your own head instead of just recognizing it. Decks for English, Spanish, Chinese and more are built in, and you can create your own. Review reminders nudge you when it's time, and it's free on iOS and Android.
So the honest answer: if you love writing cards and your deck is small, paper is great — keep it. But once volume grows and “when do I review this?” becomes the hard part, that's where an app earns its place. You don't have to pick a side forever; use paper for what it does well, and let an app handle the scheduling it does better.
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
Isn't writing cards by hand better for memory?
Writing does help information sink in, so it's a real advantage of paper on the input side. But memory is mostly built during review, not creation. An app can't fully replace handwriting, yet it handles the review timing that decides whether a word actually sticks.
Can I just use both paper and an app?
Yes, and many people do. Use paper for the cards you enjoy writing and a small active set, and lean on an app once the volume grows and tracking review timing by hand becomes unrealistic.
What's the single biggest advantage of an app?
It schedules the review of each word for you. Instead of guessing when to come back to a card, the forgetting curve decides, and weak words return sooner while easy ones fade into the background.
Does Flips let me make my own cards like paper does?
Yes. Alongside built-in decks for English, Spanish, Chinese and more, you can create your own decks, so you keep the freedom of a homemade paper set while gaining automatic scheduling.