Comparison

Noji vs FlashStacks

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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/

About

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.

Highlights
  • Home and Lock Screen widgets
  • AI-powered PDF to flashcard generation
  • Spaced repetition learning
  • Image occlusion cards
  • Progress tracking and stats
  • Customizable widget themes
Features
Read full description

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

Noji4 screens
FlashStacks4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 8 days. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Noji versus FlashStacks: the parameters behind the verdict, then further details
ParameterNojiFlashStacks
PriceFreeFree
Rating4.6 (14K ratings) — better4.6 (7 ratings)
Positive reviews64.1% of reviews100.0% of reviews — better
Number of ratings14K — better7
Update frequencyEvery 8 daysEvery 8 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS16.4 — better17.6
Further details — not scored
Size195 MB11 MB
Age rating4+4+
DeveloperDELIGHTHUB PTE. LTD.Bailey Skewes

Customer experience

Noji

All ratings14,014 ratings
Positive89.3%
Neutral2.9%
Negative7.7%
Written reviews2,119 reviews
Positive64.1%
Neutral7.1%
Negative28.7%

FlashStacks

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

10 purchases

Noji

Subscriptions9
  • Premium Access: 30 Days3 Days trial$4.991 Month
  • Premium 1 Month$4.991 Month
  • AnkiPro Premium 1 Month$4.991 Month
Show 6 more
  • 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
One-time1
  • Premium Lifetime$74.99
3 purchases

FlashStacks

Subscriptions3
  • FlashStacks Premium — Monthly$4.991 Month
  • Premium Special Offer$24.991 Year
  • FlashStacks Premium — Annual1 Month trial$39.991 Year

Questions

Is Noji free?
Noji is free to download, with in-app purchases available.
Is FlashStacks free?
FlashStacks is free to download, with in-app purchases available.
Which has better reviews, Noji or FlashStacks?
Noji is rated higher. Noji averages 4.6 out of 5 from 14K ratings, while FlashStacks averages 4.6 from 7 ratings.
Do Noji or FlashStacks have ads?
Noji shows ads; FlashStacks does not.
Which is updated more often, Noji or FlashStacks?
Noji ships an update every 8 days, and FlashStacks every 8 days. Most recently, Noji was updated on November 3, 2026 and FlashStacks on October 25, 2026.

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