DeveloperCards
Every draw is earned. Every card is new.
DeveloperCards: spaced-repetition flashcards for AWS SAA-C03 and Claude Developer Foundations, where card packs are earned by studying, never sold, and never deal a duplicate. Three free decks, iOS.
Preparing for the AWS Solutions Architect Associate exam or building with Claude? DeveloperCards turns the prep into a collection you build by showing up. The loop in one sentence: learn a new card, earn a draw, open a pack, and what you draw becomes what you study.
What's inside
Three free decks, in the order the app lists them:
- AWS Architect Basics — short foundation cards in English on the AWS basics behind SAA-C03, each with a built-in Chinese translation. A good place to start.
- AWS Associate Architect — SAA-C03 cards in English. Its multiple-choice cards explain every wrong option, not just the right one.
- Claude Developer Foundations — CCDV-F cards in English across 8 domains.
Rarity is difficulty: Common, Rare and Legendary map to how hard the question is, so a Legendary is one of the hardest questions in the deck.
How draws work
- Draws are earned by studying and never sold. Learn a new card and its pack earns a draw: the first time you finish the card, by tapping Got it, answering Remembered, or getting a multiple-choice card right.
- Clearing all of a pack's due cards adds one more draw, once a day.
- Each pack gets a one-time grant of 5 draws: your first pack when the starter lesson ends, every other pack the first time you open it after that.
- Open up to 5 cards at once, or just 1. You only spend draws for the cards you receive.
- No duplicates: a card you have drawn never comes up again.
- After 10 Commons in a row, the next card is Rare or better. A rare card is guaranteed within 11 cards while the pack still has a Rare or Legendary you don't own.
- Each pack saves up to 60 draws, plus 5 extra waiting. If a pack has nothing left to study and no draws, it gets 1 free draw a day.
- Tear the pack open and flip each card. Every rarity has its own reveal sound.
How study works
A new card shows the question first. Tap Show answer, read it, then tap Got it. The card comes back the next day; there is no re-test in the same session.
Multiple-choice cards, a large share of the AWS Associate Architect and Claude decks, work differently: pick an answer, the app grades it, and every wrong option comes with an explanation of why it is wrong.
When a flashcard is due, rate it Forgot or Remembered. If you want finer control, turn on Settings › Study › Show all four rating buttons to rate with Again, Hard, Good and Easy instead.
Reviews are scheduled with FSRS, the open-source spaced-repetition algorithm, never more than 90 days out. A card is Mastered once its next review is 15 or more days away. Reviewing a single card keeps your streak alive, and the Library shows each card as New, Learning or Mastered.
A deck downloads the first time your phone is online; after that you can study offline. An account is optional: signing in adds cloud backup.
From one developer
DeveloperCards is an indie project: one person built the app and the backend. Cards are drafted with AI assistance from AWS and Anthropic documentation and checked by automated checks and AI review passes. If a card looks wrong, sign in and use Report a problem on the card, or tell me through Support.
All three decks are free. A Premium subscription exists for future premium decks, but there is nothing premium to unlock yet. Feedback is welcome.