Comparison

ANCHOKO vs Deck Lens

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

Head to head
About

ANCHOKO

Features
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ANCHOKO — hide any diagram, then learn it Image occlusion on your phone, free. Drop boxes over the labels on an anatomy plate, a circuit drawing or a map, and each box becomes its own card. IMAGE OCCLUSION THAT ACTUALLY WORKS ON A PHONE • Draw rectangles, ellipses or free-form shapes over any picture • Each shape becomes a separate card, so one diagram teaches you twenty things • Pinch to zoom while you place shapes — small labels stay reachable • Show the other boxes while you answer, or hide them • Works on photos, screenshots, textbook scans and imported PDF pages BRING YOUR ANKI DECKS • Import .apkg files and keep your cards, your images and your deck names • Cloze deletions come across as cloze deletions • Image occlusion notes keep their boxes, on the right part of the picture • Note types ANCHOKO does not know are still imported, front and back — nothing is lost • You are told what changed during the import. No silent edits PHOTOGRAPH A PAGE, GET CARDS • Photograph notes, a textbook or a handout and the text is read on your device • Cards follow the page layout — "term: meaning", "word translation", numbered lists • You see the recognised text before any card is made, so misreads never become cards RED AND COLOURED TEXT, FOUND FOR YOU • Anything written in red pen or pink highlighter is detected and covered automatically • Switch to green, blue or yellow when that is what you used • Popular with students in Japan, who use a red filter sheet for exactly this REVIEW AT THE RIGHT MOMENT • The SM-2 algorithm works out, card by card, when you are about to forget • Four ratings — Again, Hard, Good, Easy — reshape the interval • See your forgetting curve and how much is left • Cap how many new cards appear each day HANDS-FREE BROWSING Cards flip themselves at timings you choose, with read-aloud for commutes. Auto-advance never grades your cards, so your review schedule stays intact. • Also: cloze deletions, and annotations written straight onto a picture YOUR PHOTOS STAY ON YOUR DEVICE Text recognition, red-text detection and PDF rendering all happen on your device. Photos and PDFs never reach an ANCHOKO server. MORE • XP, levels, 18 achievement badges, and a weekly ranking with friends • Publish your own decks, or download and try decks other people made PRICING Free, for as long as you like: • Up to 200 cards you make yourself — they stay yours even if you stop paying • Unlimited image occlusion boxes on the cards you make • The full spaced-repetition engine, and unlimited community decks • Photo-to-cards and red-text detection, 3 a day ANCHOKO Pro adds: • Unlimited cards • Unlimited photo-to-cards and red-text detection • PDF import • Auto-advance • Backup export • Your progress follows you across devices (below) Three plans: monthly, yearly, or a one-time Lifetime purchase. Amounts are shown on the purchase screen in the app. PICK UP WHERE YOU LEFT OFF, ON ANY DEVICE • iPhone, iPad, Android and the browser share the same cards, study record, streaks and XP once you sign in • Started without an account? Signing in later keeps everything you already made SAMPLE DECKS, ONLY IF YOU WANT THEM Nothing is added behind your back. You pick what you want, added cards never count toward the free limit, and you can delete them at any time. LANGUAGES English, Japanese, Simplified Chinese, Korean, Spanish, French, Vietnamese, Thai ALSO IN YOUR BROWSER Sign in with the same account and study without installing anything. ABOUT ANCHOKO PRO Monthly and yearly are auto-renewing subscriptions: they renew unless cancelled at least 24 hours before the period ends, and you can manage or cancel them in your account settings. Lifetime is a single payment — nothing renews and there is nothing to cancel. ANCHOKO is not affiliated with or endorsed by Ankitects Pty Ltd. "Anki" names only the .apkg file format ANCHOKO can import. • Terms of Use: https://b19.co.jp/terms-of-service/ • Privacy Policy: https://b19.co.jp/privacy-policy/

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 — 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 — the same proven system behind Anki — 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 — Deck Lens gives you the tools to make it stick.

Screenshots

ANCHOKO4 screens
Deck Lens4 screens

Verdict

The call

The clearest difference is in-app purchases: Deck Lens at none against ANCHOKO's 1. ANCHOKO's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.1). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ANCHOKO sells 1 in-app purchase, starting at $2.99 per month. Deck Lens asks for nothing beyond the download.

UpkeepUpdate frequency

ANCHOKO ships an update every 2 weeks, Deck Lens every 10 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 3 level
ANCHOKO versus Deck Lens: the parameters behind the verdict, then further details
ParameterANCHOKODeck Lens
PriceFreeFree
Update frequencyEvery 2 weeksEvery 10 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size101 MB43 MB
Age rating4+12+
DeveloperBEAK,K.K.Kadir Caner Ergun

In-app purchases

1 purchases

ANCHOKO

Subscriptions1
  • ANCHOKO Premium7 Days trial$2.991 Month
None

Deck Lens

No in-app purchases

Questions

Is ANCHOKO free?
ANCHOKO is free to download, with in-app purchases available.
Is Deck Lens free?
Deck Lens is free to download, with no in-app purchases.
Do ANCHOKO or Deck Lens have ads?
Deck Lens shows ads; ANCHOKO does not.
Which is updated more often, ANCHOKO or Deck Lens?
ANCHOKO ships an update every 2 weeks, and Deck Lens every 10 days. Most recently, ANCHOKO was updated on October 28, 2026 and Deck Lens on October 25, 2026.

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