Free Flashcards with Built-In Spaced Repetition

Most learning apps feel like content libraries with a quiz layer. They work… until you plateau. The system can’t tell which micro-concept you missed, it can’t allocate practice time efficiently, and it can’t prove you’ll still remember it in a week.

That’s the problem I’m trying to solve in Tevuki — a learning engine focused on reliable recall, not “content consumed”.

Here’s the public demo — no account needed: free flashcards on tevuki.com

On the surface, it’s just flashcards. That’s intentional. Low friction matters.

The interesting part is what sits behind the cards

Skills are split into small, assessable concepts organised in a curated graph. Sessions are assembled from three streams: items that are due for review, items that target weak concepts, and a controlled amount of new material.

If you practised “greetings” yesterday but stumbled on “to be” forms, today’s session will pull in a short review set plus extra items that isolate that gap — before introducing anything new.

This is different from most flashcard apps, where every card exists in isolation. In a concept graph, cards are linked to the specific skill they test. Concepts also carry relationships — prerequisites, common confusions, related ideas — which is what makes targeted review possible rather than just random shuffle.

That means the system can reason about why you got something wrong, not just that you got it wrong.

Spaced repetition that actually adapts

Spaced repetition is one of the most well-supported techniques in learning science. The idea is simple: review material just before you’re about to forget it. But most apps implement it as a fixed schedule or a streak counter.

In Tevuki, each answer updates a memory model based on stability and half-life. A confident answer pushes the next review out; a miss brings it back sooner. The schedule isn’t a rigid curve — it responds to how you are actually performing, item by item.

Over time, the result is a concept-level map of what you can reliably recall — not just what you’ve clicked through.

Why concept-level tracking matters

A typical flashcard app tells you “you’ve studied 50 cards today”. That feels productive, but it doesn’t answer the question that matters: can you actually use this knowledge?

Concept-level tracking changes that. Instead of counting cards, the system tracks mastery per concept — looking at accuracy over time, across multiple exposures, and checking whether recall holds up without the safety net of multiple-choice options.

This means you get a clear picture of what’s solid and what needs more work. No guessing, no inflated progress bars.

Try the free flashcards

The free flashcards are a public slice of the system. No account needed, no tracking — just practice.

Popular sets: Animals · Emotions · Colors · Food · Body Parts. Each topic has a printable PDF you can download for free.

If something feels off (too easy, too hard, unclear feedback), that signal is useful. The feedback loop applies to the product itself, not just the learner.