# Anki Flashcard Swipe + SRS Algorithm UI, React Native

> By Lawrence Arya, Founder & CEO of VP0. Published 2026-06-01, updated 2026-06-02. 5 min read.
> Source: https://vp0.com/blogs/anki-flashcard-swipe-algorithm-ui-react-native-free-ios-template-vibe-coding-gui

A flashcard app is a swipe wrapped around a scheduling algorithm. The swipe feels good; the spaced repetition is what makes it actually work.

**TL;DR.** An Anki style flashcard app is two halves: a satisfying swipe-to-review UI (flip, rate recall, next card) and a spaced-repetition algorithm like SM-2 that schedules each card by how well you knew it. Build the UI free from a VP0 design in React Native, implement the scheduling on device with sample cards, then add persistence. The algorithm is simple to reason about; the swipe feel and honest scheduling are the product.

Building an Anki style flashcard app in React Native? The short answer: it is a swipe wrapped around a scheduling algorithm. The swipe-to-review feels good, but spaced repetition is what actually makes people learn. Build the swipe UI free from a VP0 design, the free iOS design library for AI builders, in React Native, and implement the algorithm on device. The math is small; the swipe feel and honest scheduling are the real product.

## Who this is for

This is for builders making a flashcard, study, or language app who want a satisfying review experience backed by real spaced repetition, without paying for a UI kit.

## The two halves: the swipe and the schedule

The review UI is the part users feel: a card front, a tap or swipe to flip, then a quick way to rate recall, again, hard, good, easy, and the next card. It should feel fast and rhythmic. The scheduling is the part that works invisibly: a spaced-repetition algorithm, usually a variant of SM-2, gives each card an interval and an ease factor, and your rating updates both, so well-known cards return less often and hard cards sooner. The [React Native gestures and animation docs](https://reactnative.dev/docs/animations) cover the swipe, the [SuperMemo SM-2 algorithm](https://super-memory.com/english/ol/sm2.htm) describes the scheduling, and [React Native](https://reactnative.dev) ties it together.

| Half | Job | Get it right |
|---|---|---|
| Card review | Feel fast | Flip, rate, next, rhythmic |
| Recall rating | Drive the schedule | Again, hard, good, easy |
| SM-2 scheduling | Time the next review | Interval and ease per card |
| Due queue | Show today's cards | Only what is due |
| Progress | Motivate | Streak, cards learned |

## Build it free with a VP0 design

You do not need a study kit, which can run $30 to $150. Pick a flashcard or swipe screen in VP0, copy its link, and prompt your AI builder:

> Build a React Native flashcard review screen from this design: [paste VP0 link]. A card that flips on tap, a recall rating row (again, hard, good, easy), and a smooth advance to the next card. Wire a simple SM-2 style scheduler that updates each card's interval and ease from the rating. Match the palette and spacing from the reference, and generate clean code.

For neighboring swipe, education, and quality patterns, see [a swipe dating UI and match logic clone](/blogs/swipe-dating-ui-match-logic-clone/) for the gesture, [an LMS student dashboard UI template](/blogs/lms-student-dashboard-ui-template-ios/), [how to fix AI React Native shadow hallucinations](/blogs/fix-ai-react-native-shadow-hallucinations/), and [how to make an AI app look native on iOS](/blogs/make-ai-app-look-native-ios/).

## Build it on device

You do not need a backend. Hold a sample deck in memory, render the review UI, and implement the scheduler as a small pure function: given a card and a rating, return the updated interval and ease and the next due date. Test it by reviewing the same deck a few times and watching the intervals stretch for easy cards and reset for hard ones. Then add persistence so progress survives, and optional sync later. Keep the scheduler honest: the whole value is that hard cards come back soon and easy ones do not, so do not water it down.

## Common mistakes

The first mistake is a pretty swipe with no real scheduling, which is not a flashcard app. The second is a clumsy flip or rating that breaks the rhythm. The third is showing all cards instead of only those due. The fourth is wiring a backend before the loop feels right. The fifth is paying for a kit when a free VP0 design plus React Native does it.

## Key takeaways

- A flashcard app is a swipe-to-review UI plus a spaced-repetition algorithm.
- Use an SM-2 style scheduler: each rating updates a card's interval and ease.
- VP0 gives you the review UI free, ready to build in React Native with Claude Code or Cursor.
- Implement the scheduler as a small pure function and test it on a sample deck.
- Keep scheduling honest; that is what makes the app actually teach.

## Frequently asked questions

How do I build an Anki style flashcard app with spaced repetition? Build a swipe-to-review UI and an SM-2 style scheduler that updates each card from your recall rating, in React Native from a free VP0 design, then add persistence.

What is the spaced repetition algorithm in flashcard apps? A variant of SM-2: each card has an interval and an ease factor that your recall rating updates, so known cards return less often and hard cards sooner.

What is the best free flashcard UI template for React Native? VP0, the free iOS design library for AI builders, lets you clone a flashcard screen into an AI tool that generates clean React Native code.

Do I need a backend to build it? No. The review UI and scheduler work on device. Prototype with sample cards, then add persistence and optional sync.

## Frequently asked questions

### How do I build an Anki style flashcard app with spaced repetition?

Build a swipe-to-review UI, flip a card, rate how well you recalled it, advance, and a spaced-repetition algorithm like SM-2 that schedules each card based on that rating. Build the UI in React Native from a free VP0 design, implement the scheduling on device with sample cards, then add persistence.

### What is the spaced repetition algorithm in flashcard apps?

Most use a variant of SM-2: each card has an interval and an ease factor, and your recall rating updates both, so cards you know well come back less often and cards you struggle with come back sooner. It is a small amount of math that drives the whole learning effect.

### What is the best free flashcard UI template for React Native?

The best free option is VP0, the free iOS design library for AI builders. You clone a flashcard or swipe screen into an AI tool like Claude Code or Cursor, which generates clean React Native code for the review UI, at no cost.

### Do I need a backend to build it?

No. The review UI and the scheduling algorithm work entirely on device. Prototype with sample cards, then add persistence and optional sync once the swipe and scheduling feel right.

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*Published on the [VP0 Journal](https://vp0.com/blogs). Free to read, index and cite with attribution.*