LeetFlash vs DeveloperCards
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
LeetFlash
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Mastering algorithms isnβt just about solving problems β itβs about reviewing them effectively! LeetFlash applies spaced repetition techniques, inspired by the Ebbinghaus forgetting curve, to help you deeply memorize and retain LeetCode problems, making your technical interview prep smarter and more efficient. Key Features: - Intelligent Review Scheduling: Automatically plan optimal review times based on your performance. - Easy Problem Capture: Use our Chrome Extension to save problems. - Cross-Device Sync: Keep your study progress in sync across mobile and desktop. Who is it for? - Students and professionals preparing for technical interviews - Developers aiming to strengthen their algorithm foundation - Learners looking to build a sustainable and effective study habit Let LeetFlash be your coach for algorithm mastery β turn your practice into lasting success! Note: Adding new problems is currently supported via the LeetFlash website. The iOS app focuses on reviewing your existing saved problems. Privacy Policy: https://www.leetflash.com/privacy Terms of Use: https://www.leetflash.com/terms
DeveloperCards
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Preparing for a .NET interview, the AWS SAA-C03 or the Claude Developer Foundations exam? DeveloperCards 2.0 turns the prep into a card collection: studying earns most of the draws that fill it. WHAT'S INSIDE Three free decks, all in English: β’ .NET & C# Interview: 217 cards for .NET 8 / C# 12, junior to mid. 90 question-and-answer cards and 127 multiple-choice cards; every wrong option is explained and every card quotes Microsoft Learn. β’ AWS Associate Architect: 371 cards for the SAA-C03, including 165 multiple-choice cards with every wrong option explained. β’ Claude Developer Foundations (CCDV-F): 441 cards across all 8 exam domains, including 142 multiple-choice cards. HOW DRAWS WORK β’ Pick a goal (add an exam date if you have one: reviews finish the day before the exam), then take a 5-card starter lesson: study each card, then check what you recall. The lesson ends with 3 draws for that pack. β’ Learn a new card to earn a draw for its pack: the first time you answer Remembered, Hard, Good or Easy, or get a multiple-choice card right. Clearing all due cards adds one more draw, once a day. Every other pack gives 3 draws the first time you open it. β’ Draws are earned, never sold. β’ No repeat draws: a card you have drawn never comes up again. β’ After 10 Commons in a row, a rare card is guaranteed: the next card is Rare or better while the pack still has a Rare or Legendary you are missing. β’ Open 1 or Open 10. You only spend draws for cards you receive. β’ Each pack saves up to 60 draws, plus 5 extra draws waiting. With nothing left to study and no draws, you get 1 free draw a day per pack. HOW STUDY WORKS Two buttons by default, Forgot and Remembered; turn on all four (Again / Hard / Good / Easy) in Settings βΊ Study. On a multiple-choice card you decide first, tap Show options, then answer Sure, Not sure or I don't know. Reviews are scheduled with FSRS, the open-source spaced-repetition algorithm (default parameters), never more than 90 days out. A card counts as Mastered once its next review is 15 or more days away. Cards you miss go to the Mistake Book. Progress by domain shows card counts for each exam domain, never a score. Many cards show their source. Reminders are optional and you can turn them off. OFFLINE AND ACCOUNT The first cards of each deck ship inside the app, so your first lesson works with no connection. The full deck downloads when your phone is online; after that, study works offline. An account is optional: signing in adds cloud backup and lets you report a problem with a card. FROM ONE DEVELOPER DeveloperCards is an indie project: one developer built the app and the backend. Cards are drafted with AI assistance from official documentation (AWS, Anthropic, Microsoft Learn), checked by automated checks and AI review passes. If a card looks wrong, sign in and tap Report a problem under its answer. All three decks are free. LINKS Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tartan-tortoise-e81.notion.site/DevCards-Spaced-Recall-Privacy-Policy-2bfa758eb54580db99a3ed89369f9a13 Not official exam material and not an exam simulator. AWS is a trademark of Amazon.com, Inc. Claude and Anthropic are trademarks of Anthropic, PBC. .NET and C# are trademarks of Microsoft Corporation. DeveloperCards is not affiliated with, sponsored by, or endorsed by Amazon, Anthropic or Microsoft.
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Verdict
LeetFlash and DeveloperCards are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. LeetFlash sells 2 in-app purchases, starting at $4.99 per month and DeveloperCards sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | LeetFlash | DeveloperCards |
|---|---|---|
| Price | Free | Free |
| Update frequency | β | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details β not scored | ||
| Size | 32 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | ζΆ¦η° δ½ | TimeAwake Limited |
In-app purchases
LeetFlash
- LeetFlash Premium$4.991 Month
- LeetFlash Premium$49.991 Year
DeveloperCards
- DeveloperCards Premium$2.991 Month
Questions
Is LeetFlash free?
Is DeveloperCards free?
Do LeetFlash or DeveloperCards have ads?
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