cardFlash vs Zeroth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
cardFlash
This free flashcard application offers two study modes: Flashcard Mode for traditional review and Adaptive Mode, which uses a smart algorithm to ensure mastery of terms. It allows for easy creation and import of study sets, including from Quizlet, and is completely ad-free.
- Adaptive Learn Mode
- Flashcard Mode
- Quizlet Import
- 100% Ad Free
- QR Code Set Sharing
- Folders
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No one likes paying for educational tools. Quizlet's paywalling harms thousands of students by taking away a valuable study resource. Hence, cardFlash is completely FREE! My mission with cardFlash is to provide everyone with equal access to the tools to be successful in whatever educational they pursue. A simple, clean flashcard app to help you learn what you need to learn. cardFlash will ALWAYS remain completely free and without ads (because ads suck). cardFlash makes studying for that French or Spanish test super easy! If your teacher has a set on Quizlet, you are able to quickly to import it in to cardFlash. Otherwise, you can also easily create a brand new set inside of cardFlash. Once you have your set, you can either choose to study with Flashcard Mode or Adaptive Mode. Flashcard mode allows you to go through the set just as if you had physical flashcards. Adaptive mode tests you with multiple choice and writing questions to help you learn the terms. Adaptive mode will guarantee that you know your stuff, the algorithm won't let you move past a term till you can get it right many times in a row. Adaptive mode is also super customizable, with its settings page that allows you to tweak everything about of the algorithm to best suit you. CURRENT FEATURES: - Adaptive Learn Mode - Flashcard Mode - Smart Flashcard Mode - Easily Edit Your Sets - 100% Ad Free - Quizlet Import - QR Code Set Sharing - Folders FEATURES TO COME: - Image Support - TTS Support - Online Sharing of Sets Request new features here: https://itsmichaelyu.github.io/cardFlashFeature Report bugs here: https://itsmichaelyu.github.io/cardFlashBug
Zeroth
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Zeroth helps you become a better programmer through daily practice and gamified learning. FEATURES: - Daily programming challenges tailored to all skill levels - 5 question types: multiple choice, code output, find the bug, mix & match, drag & drop - Track your learning streak and earn achievements - Compete on global leaderboards - Offline support — practice anywhere, anytime - Beautiful dark mode interface - Detailed explanations after every question PERFECT FOR: - Students learning to code - Developers preparing for interviews - Programmers staying sharp - Bootcamp graduates practicing fundamentals Start your learning journey today!
Screenshots
Verdict
The clearest difference is update cadence: Zeroth at daily against cardFlash's every 3 weeks. cardFlash's advantage is iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
cardFlash ships an update every 3 weeks, Zeroth daily. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.
| Parameter | cardFlash | Zeroth |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (25 ratings) — better | — |
| Positive reviews | 94.1% of reviews | — |
| Number of ratings | 25 — better | — |
| Update frequency | Every 3 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 35 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Yu | Mukhammadnozim Islamov |
In-app purchases
cardFlash
No in-app purchases
Zeroth
No in-app purchases









