Anki vs AnkiApp

INTRODUCTION

If you searched "anki vs ankiapp," you probably downloaded one and then discovered you might have the wrong one. You are not alone. Forum threads on AnkiWeb with titles like "Two versions of Anki? Orange and Blue?" and "What is the difference other than $25?" show that thousands of students have made the same mistake. Here is the short answer: AnkiApp is not Anki. They are completely separate products built by different companies with different codebases, different pricing, and different spaced repetition algorithms. Anki is free and open-source software created by Damien Elmes in 2006. AnkiApp, now rebranded to AlgoApp, is a closed-source subscription product from Admium Corp. that Anki's own official FAQ labels a "knockoff." This article explains the full story, compares the two head to head, shows how to move your cards if you picked the wrong one, and lists modern alternatives that have launched since 2025.

They Are Not the Same Product

This is the most important fact in this article. AnkiApp was built by Admium Corp., a small software firm founded in 2011. It launched around 2012 and has no connection to the original Anki project. The Anki FAQ page states that AnkiApp, Anki Pro, and other similarly named apps "were developed by separate groups of people, and they are not related to the rest of the Anki ecosystem." The page goes further, noting that the developers suspect the names were deliberately chosen to exploit the brand recognition that Anki built over nearly two decades.

The confusion runs deep. AnkiApp used the word "Anki" in its name and appeared in App Store search results alongside the official AnkiMobile. Many students purchased it thinking it was the real thing, built card decks inside it, and only realized weeks or months later that their data was locked in an incompatible system. AnkiApp has since rebranded to AlgoApp, though residual "AnkiApp" branding still appears in some non-English App Store listings as of 2025.

What Anki Actually Is

Anki was created by Australian developer Damien Elmes in 2006. It is free, open-source software licensed under AGPLv3. The desktop app runs on Windows, macOS, and Linux at no cost. AnkiDroid, the community-developed Android port, is also free and has crossed 10 million Google Play downloads. AnkiMobile, the official iOS app built by Elmes, costs $24.99 as a one-time purchase. AnkiWeb provides free cloud sync across all devices.

In October 2023, Anki version 23.10 replaced its long-standing SM-2 scheduler with FSRS (Free Spaced Repetition Scheduler) as the default algorithm. FSRS was developed by Jarrett Ye and the Open Spaced Repetition community. It uses a machine learning model trained on roughly 727 million reviews from 10,000 Anki users. Compared to SM-2, FSRS typically reduces total reviews by 20 to 30 percent at the same retention level.

The ecosystem is massive. Over 1,600 add-ons are listed on AnkiWeb, with popular ones including Review Heatmap, AnkiConnect for browser integration, and image occlusion tools. A 2024 survey cited by Class Central found that 86.2 percent of U.S. medical students use Anki, with 66.5 percent using it daily. The AnKing Step Deck alone has surpassed 300,000 downloads.

In February 2026, Elmes announced he is gradually transitioning operations and open-source stewardship to AnkiHub, founded by Nick Flint and Andrew Sanchez. The platform remains open-source with no investor involvement.

What AnkiApp (Now AlgoApp) Is

AnkiApp was published by Admium Corp. around 2012. It is a closed-source, subscription-based flashcard tool available on iOS, Android, macOS, and web. There is no Linux client and no native Windows desktop app.

Pricing as of 2026: $24.99 per year for "AnkiApp Unlimited" or $49.99 for a lifetime subscription, according to the App Store listing. These prices have changed over time, with some users reporting earlier tiers of $4.99 per month or $74.99 lifetime.

AnkiApp markets an "AI-based Advanced SRS" algorithm described as "designed by the team's published neuroscientist." There is no published algorithm documentation, no peer-reviewed paper, and no open-source repository. Independent reviewers have described it as functioning like a basic Leitner system rather than a true FSRS or SM-2 level scheduler.

The app has drawn significant criticism. An analysis of 19,730 reviews on JustUseApp gives it a legitimacy score of 56.6 out of 100. Commonly reported issues include sync failures, slow update cadence, limited card editing options, and server outages during exam season.

Head-to-Head Comparison

The pricing gap deserves its own note. Real Anki costs zero on desktop and Android. The only paid component is the $24.99 iOS app, which is a one-time purchase that funds continued development. AnkiApp charges $24.99 every year for the same kind of platform access that Anki provides for free or for a single payment.

The Algorithm Gap

The difference between FSRS and an undocumented algorithm is not just a technical footnote. FSRS has two published papers: Ye, Su, and Cao (2022) at ACM KDD and Su, Ye, Nie, Cao, and Chen (2023) in IEEE TKDE. The algorithm's parameters are openly benchmarked against real user data. It personalizes scheduling by modeling three memory components: difficulty, stability, and retrievability.

AnkiApp's algorithm has no published documentation. Users have no way to verify what it does, whether it adapts to individual patterns, or how its scheduling decisions compare to algorithms with peer-reviewed evidence. In a field where Dunlosky et al. (2013) identified spaced practice as one of only two "high utility" study techniques, the quality of the spacing algorithm directly affects learning outcomes.

The science behind spaced repetition is well established. Murre and Dros (2015) replicated Ebbinghaus's original forgetting curve in PLOS ONE, confirming exponential memory decay. Martinengo et al. (2024) published a meta-analysis in JMIR showing that spaced digital education improves knowledge, skills, and clinical practice. The question is not whether spaced repetition works. It is whether the tool scheduling your reviews does it well.

How to Move Your Cards from AnkiApp to Anki

If you have been building decks in AnkiApp and want to switch, there is a working migration path. A developer named Abdo has published an add-on called "Copycat Importer (AlgoApp/Noji)" that imports decks from AnkiApp/AlgoApp and Anki Pro/Noji into real Anki. The official Anki FAQ explicitly endorses this tool.

To use it: install Anki Desktop, open the add-on manager (Tools, then Add-ons, then Get Add-ons), enter the add-on code 2072125761, install it, restart Anki, and follow the prompts to connect your AnkiApp account and pull your decks over. Card content and media should transfer. Review scheduling history will not carry over, so your first few days will feel like starting fresh, but the cards themselves will be intact.

Modern Alternatives Worth Considering

For users who want spaced repetition without configuring Anki or risking AnkiApp, several tools have launched since 2025 with AI card generation and modern interfaces. If you are exploring options beyond the Anki ecosystem, the Mindomax guide to spaced repetition apps covers even more tools.

1. Mindomax, AI Flashcards From Any Source

Mindomax generates flashcards from PDFs, audio recordings, images, and plain text. The audio-to-flashcard feature is uncommon among competitors. The app includes a LaTeX formula editor, pronunciation support in fourteen languages, and over 450,000 pre-made flashcards covering USMLE, MCAT, GRE, PMP, and multiple foreign languages. Free allows one box with unlimited cards and three AI requests daily. Premium costs $5.99 per month.

Download: iOS · Android · Web

2. StudyGlen, FSRS by Default

StudyGlen is the only tool outside Anki that runs FSRS as its default scheduler for AI-generated decks. It also converts SM-2 scheduling history when importing .apkg files, preserving review data that would otherwise be lost in a migration. Free tier allows five imports per day, with credit packs available for heavier use.

Download: Web

3. FlashRecall, AI Cards From Multiple Formats

FlashRecall creates flashcards from PDFs, images, YouTube videos, audio files, and text. It positions itself as having no Anki-style paywall, with an iOS-native experience. The free tier covers basic use, with an in-app upgrade for unlimited AI generation.

Download: iOS

4. Memo AI, Workspace Plus Flashcards

Memo AI combines source management with flashcard generation and an AI tutor. Users can choose between GPT-4, Claude, and Gemini as the AI backend. The platform reports over 300,000 users. A freemium model covers basic access.

Download: Web

CONCLUSION

Anki and AnkiApp are not the same product. Anki is free, open-source software backed by peer-reviewed algorithms, over 1,600 add-ons, and a community of millions. AnkiApp, now renamed AlgoApp, is a paid subscription tool from Admium Corp. with no connection to the Anki ecosystem, no published algorithm, and a fraction of the features. If you downloaded the wrong one, the Copycat Importer add-on can move your cards over. If you want a fresh start with modern AI card generation, tools like Mindomax, StudyGlen, FlashRecall, and Memo AI have launched since 2025 with features that neither legacy Anki nor AnkiApp currently offer. For students preparing for medical board exams, choosing the right tool from the start saves weeks of wasted effort.