Noji vs FlashStacks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Noji
Create and study digital flashcards using an enhanced spaced repetition algorithm to maximize learning. Access a vast library of pre-made decks or collaborate online. Ideal for students, teachers, and language learners.
- Create and study digital flashcards
- Enhanced spaced repetition algorithm
- Customizable card appearance
- 50k pre-made deck library
- Online collaboration
- Web version for cross-device use
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Noji helps you to remember anything! In the app you create and study flashcards. Having been build on an enhanced spaced repetition algorithm, the app helps you to get the maximum out of studying new materials. Millions of people use the app to remember lecture materials, prepare for exams and learn new vocabulary. Noji has a web version that allows you to use the app across all your devices. Powerful features, sleek design, fast performance, online collaboration, all of these help Noji to become an effective study helper. The app will help you to create nice and easy to use digital flashcards and avoid managing a pile of uncategorized physical index cards. Here are the benefits you get from the Noji flashcards app: - Create and study flashcards - Use different customizations to make cards look the way you want - Explore a 50k pre-made deck library How people use Noji: - Students - study lecture materials during the year and prepare for exams. Millions of students get the highest grades by studying index cards using spaced repetition technique. - Teachers - Noji app helps to make a database of knowledge in the format of revision cards and share it with students. - Language learners - flashcards are well known as the best way to study new vocabulary. The huge library helps to find a perfect ready-to-use deck and not to waste time creating your own flashcards. App interface is simple and clear but at the same time, the app is extremely powerful. The app allows you to have thousands of flashcards and makes it easy to manage them. WHAT OUR USERS SAY ABOUT THE NOJI: "Finally, I found the app that I can intuitively use! I don't need to watch tons of videos to understand how to create and learn cards in other srs products. It's so easy here. I'm in love with Noji!" - Jeffrey Houng "I use the app to prepare for the MCAT exam. I can say that it definitely works! " - Matthew Moore "Flashcards is the thing that changed my habits to study Japanese. Using spaced repetition I can study new words and don't forget them in a few weeks as it used to be." - Alysa Tossou The app is fully supported by a professional team. You'll constantly get new features, improvements, and bug fixes. We also love getting personalized feedback, so don't be shy to message us right in the app! We personally answer all messages. Privacy Policy: https://noji.io/privacy-policy/ Terms of Use: https://noji.io/terms-of-use/
FlashStacks
Transform study materials into interactive Home Screen widgets. AI generates flashcards from PDFs, and spaced repetition optimizes learning. Visualize concepts with image occlusion and track progress with detailed stats.
- Home and Lock Screen widgets
- AI-powered PDF to flashcard generation
- Spaced repetition learning
- Image occlusion cards
- Progress tracking and stats
- Customizable widget themes
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Your flashcards, on your Home Screen. FlashStacks turns your study cards into Home Screen, Lock Screen and StandBy widgets. Glance at a question between classes. Tap to reveal the answer. Tap again for the next card — all without opening the app. Learning fits into the moments already filling your day. ALWAYS VISIBLE, ALWAYS READY Widgets come in every size and rotate through your stacks automatically, so every time you pick up your phone there's something new to learn. Start a study session and your card follows you to the Lock Screen and Dynamic Island as a Live Activity. AI DECKS FROM YOUR NOTES Upload any PDF — lecture slides, textbook chapters, study guides — and AI builds a complete deck in seconds. Choose High-Yield for exam prep or Comprehensive for full coverage. FlashStacks even finds the diagrams in your PDF so you can turn them into image occlusion cards. LEARN A LANGUAGE FlashStacks Learn gives you ready-made packs in French, Spanish, Japanese, Korean and Mandarin — greetings, numbers, food, travel and more. Add a pack and pick up new words from your Lock Screen all day. SPACED REPETITION THAT WORKS FlashStacks uses the same proven science behind Anki. Cards you struggle with come back sooner. Cards you've mastered fade into the background. Study smarter, not longer. IMAGE OCCLUSION CARDS Add any image — diagrams, anatomy, maps — and draw boxes over the parts to hide. Tap to reveal what's underneath. Perfect for visual subjects. BRING YOUR CARDS WITH YOU Import from Anki, CSV, TSV or JSON. Search every card across all your stacks and keep them organised with tags. BEAUTIFUL BY DESIGN Every stack gets its own colour palette — soft pastels or bold modern tones — and your widgets match. Dark mode uses pure OLED black. TRACK YOUR PROGRESS See mastery, difficulty breakdown and 14-day activity for every stack, plus a study calendar across everything you've learned. Build a streak. Hit your daily goal. FLASHSTACKS PREMIUM Unlock unlimited stacks, AI deck generation from PDF, image occlusion cards and every FlashStacks Learn pack. Free accounts include up to 2 stacks. Monthly and annual plans available. Annual plans include a discounted first month. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Noji and FlashStacks both sit at 4.6 stars, but that hides the real split: 100% of FlashStacks's written reviews are positive against 64% of Noji's. FlashStacks also leads on ads (none vs shown). Noji's advantage is ratings volume (14K vs 7). On price, rating, update cadence and in-app purchases 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. Noji sells 10 in-app purchases, starting at $4.99 per month and FlashStacks sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Noji against 4.6 for FlashStacks. That said, the two scores are not equally well evidenced: Noji has 14K ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 64% of Noji's written reviews are positive against 100% of FlashStacks's.
Both ship on a similar rhythm, roughly every 8 days. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | Noji | FlashStacks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (14K ratings) — better | 4.6 (7 ratings) |
| Positive reviews | 64.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 14K — better | 7 |
| Update frequency | Every 8 days | Every 8 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 — better | 17.6 |
| Further details — not scored | ||
| Size | 195 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | DELIGHTHUB PTE. LTD. | Bailey Skewes |
Customer experience
Noji
FlashStacks
Bugs and requests
Noji
Reported bugs
4 issues- Issues with uploading and editing images on cards
- Problems with card review timing and scheduling
- Decks not loading or disappearing
- Connectivity issues and server errors
Requested features
5 requests- Add offline mode
- Improve deck organization and management
- Allow more customization of card layout and formatting
- Implement better syncing and backup options
- Add more language support for text-to-speech
FlashStacks
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Noji
- Premium Access: 30 Days3 Days trial$4.991 Month
- Premium 1 Month$4.991 Month
- AnkiPro Premium 1 Month$4.991 Month
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- AnkiPro Premium Annual$17.991 Year
- Premium 1 Month$19.991 Month
- Noji Flashcards - Premium Plan3 Days trial$29.991 Year
- Premium - Annual Plan$44.991 Year
- Premium Annual Plan new7 Days trial$89.991 Year
- Premium - Annual Plan7 Days trial$89.991 Year
- Premium Lifetime$74.99
FlashStacks
- FlashStacks Premium — Monthly$4.991 Month
- Premium Special Offer$24.991 Year
- FlashStacks Premium — Annual1 Month trial$39.991 Year









