Comparison

Deck Lens vs PrepFast

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

Head to head
About

Deck Lens

Features
Read full description

Study smarter, not harder. Deck Lens is a clean, focused flashcard app built for learners who love Anki but want a more modern experience on their phone. Import your existing Anki decks, study with proven spaced repetition, and watch your progress grow โ€” all without the clutter. Import Your Anki Decks Instantly Already have .apkg files? Just open them in Deck Lens. Your cards, media, and deck structure come along for the ride. Switching from Anki has never been easier. Spaced Repetition That Works Deck Lens uses the SM-2 algorithm โ€” the same proven system behind Anki โ€” to schedule your reviews at the perfect time. Rate each card as Again, Hard, Good, or Easy, and the app handles the rest. You'll see exactly when each card comes back before you tap. A Study Experience You'll Actually Enjoy Flip through cards with smooth animations, track your session progress, and get a summary when you're done. Set daily review limits so you never feel overwhelmed. Swipe Mode Prefer gestures? Swipe through your cards for a fast, tactile study flow. Know Where You Stand Check your stats anytime: review heatmap, retention rate, streak counter, and cards broken down by status (new, learning, review). See what's working and where to focus. Create and Edit Your Own Decks Build flashcards from scratch or tweak imported ones. Deck Lens supports rich card content so your notes look the way you want. Export and Share Export any deck back to .apkg format and share it with friends, classmates, or your other devices. Your data is always yours. Available in English, German, and Turkish. Whether you're learning a new language, studying for exams, or memorizing anything else โ€” Deck Lens gives you the tools to make it stick.

About

PrepFast

Features
Read full description

Stop blind reading notes. PrepFast turns your notes into actionable learning. Generate Q&A study sheets, take preparatory tests, get evaluated on every answer, and learn exactly how to write perfect answers in your exams โ€” then lock it all in with science-backed active recall. It's like having an extended version of your test paper in your hand. HOW IT WORKS Upload your notes (PDFs, images, or text), and PrepFast instantly converts them into structured study sheets with: - MCQs and descriptive questions - 1-mark, 2-mark, and 5-mark answers - Exact answers designed for exams Then go beyond just reading: - Take preparatory tests based on your notes - Get each answer evaluated with scores - See your Exam Readiness Score, plus a breakdown of Accuracy, Understanding, and Key Words - See ideal answers and detailed explanations And make it stick with active recall: - Every study sheet follows a spaced-repetition cycle, prompting you to revisit key questions at the right intervals - Track your progress question by question as you master each topic - Know exactly when โ€” and what โ€” to revise next KEY FEATURES - Turn notes into Q&A study sheets instantly - Study with built-in spaced-repetition active recall - Take tests and get answer-wise evaluation - See your Exam Readiness Score before the real exam - Learn "perfect answers" for exam writing - Smart categorization for structured revision - Clean, distraction-free study experience - Share your study sheets with friends as PDF - Save and revisit everything anytime WHO IS IT FOR - Students preparing for school and college exams - Anyone tired of re-reading notes without retention - Learners who want structured practice, scoring, and long-term retention You can access and try out all features in the free tier and turn to the premium plan for unlimited usage of all features. Stop passive reading. Start active learning. Study faster, practice smarter, and write better answers in your exams with PrepFast. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Deck Lens4 screens
PrepFast4 screens

Verdict

The call

The clearest difference is in-app purchases: Deck Lens at none against PrepFast's 6. Deck Lens also leads on update cadence (every 10 days vs every 6 weeks). PrepFast's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. PrepFast sells 6 in-app purchases, starting at $3.99 per 7 days. Deck Lens asks for nothing beyond the download.

UpkeepUpdate frequency

Deck Lens ships an update every 10 days, PrepFast every 6 weeks. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.

Scorecard3 real differences ยท 3 level
Deck Lens versus PrepFast: the parameters behind the verdict, then further details
ParameterDeck LensPrepFast
PriceFreeFree
Update frequencyEvery 10 days โ€” betterEvery 6 weeks
AdsYesNo โ€” better
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details โ€” not scored
Size43 MB66 MB
Age rating12+4+
DeveloperKadir Caner ErgunSagar Angadi

In-app purchases

None

Deck Lens

No in-app purchases

6 purchases

PrepFast

Subscriptions6
  • Premium Weekly Early$3.997 Days
  • Premium Weekly$4.997 Days
  • Premium Monthly Early$9.991 Month
Show 3 more
  • Premium Monthly$12.991 Month
  • Premium Annual Early$49.991 Year
  • Premium Annual$59.991 Year

Questions

Is Deck Lens free?
Deck Lens is free to download, with no in-app purchases.
Is PrepFast free?
PrepFast is free to download, with in-app purchases available.
Do Deck Lens or PrepFast have ads?
Deck Lens shows ads; PrepFast does not.
Which is updated more often, Deck Lens or PrepFast?
Deck Lens ships an update every 10 days, and PrepFast every 6 weeks. Most recently, Deck Lens was updated on September 9, 2026 and PrepFast on September 15, 2026.

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