AlgoApp vs Flashcards by HS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AlgoApp
Create and study flashcards for languages or academic subjects using AI-powered tools and advanced spaced repetition. Supports offline use, cross-device syncing, and imports from other platforms. Offers a free trial for unlimited access.
- AI-powered PDF to flashcard conversion
- Automatic translation and text-to-speech
- Offline study mode
- Cross-device syncing
- Furigana and Pinyin annotations
- Anki deck import
- Study groups
Read full descriptionHide full description
Learn languages, or study for school and tests, with the most powerful and user-friendly flashcard app. Millions of language-learners and students have studied over 2 billion flashcards with AlgoApp. Ranked #1 Education app in multiple countries world-wide. Featured in the New York Times. Designed by learning experts, including a published neuroscientist. Whether you're learning a language to live somewhere new or just for fun, need to get through med school, or just want to crush your tests, AlgoApp has already done it for over 5 million people. Why AlgoApp? FOR LANGUAGE LEARNERS • Automatic translation. Make vocab flashcards faster by typing words in the language you know, then AlgoApp translates to the language you're learning (or vice versa). Supports 120 languages including Japanese, Chinese, Korean, English, German, French, and more... • Speaks flashcards to you, in dozens of languages (automatic text-to-speech). Supports 39 languages including Japanese, Chinese, Korean, English, German, French, and more... • Automatically generates furigana annotations for kanji, or pinyin annotations for hanzi. FOR STUDENTS • Converts PDFs directly into flashcards using AI. Upload lecture slides and have a full deck of flashcards ready in seconds. • Prompt AI to make flashcards for you based on text and pictures. Turns handwritten notes and diagrams into flash cards for you. • Format your cards with colored text, bulleted lists, underlines, and more (no CSS needed). • Works offline, so you can study and make cards even when you don't have signal. • Syncs automatically with desktop, web app, and your other phones and tablets. So you can make cards on a computer with a full keyboard, then study on your phone. • Natively supports FSRS, the most-advanced spaced repetition algorithm. • Imports Anki decks (.apkg), AlgoApp (.xml) files, or spreadsheets (.csv). • Supports folders and subfolders, to keep your classes organized. • Notifications tell you when it's time to study (opt-in). • Share decks and study with your friends using Study Groups. • No ads. For the most-dedicated students, try AlgoApp Unlimited free for 7 days. Study as much as you want on all your devices. If you want to upgrade to AlgoApp Unlimited, you can either purchase "Unlimited: 1-Year" which is a 1-year auto-renewing subscription, or "Unlimited: Lifetime" which is a one-time purchase. • Unlimited grants you access to unlimited cross-platform multi-device sync, and more.. • If you choose "Unlimited: 1-Year", the subscription will automatically renew, unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your Apple Account within 24-hours before the end of the current period (renewal or trial period). • You can manage your subscription and disable auto-renewal by going to your Account Settings after purchase. Terms of Service: https://www.algoapp.ai/terms.html Privacy Policy: https://www.algoapp.ai/privacy.html
Flashcards by HS
Create custom flashcards with images and sounds to aid learning. Supports multiple languages and offers flexible card and list formats. Organize your study sessions with adjustable question order and answer flipping.
- Image and sound integration
- Speech synthesizer
- Customizable card formats
- Adjustable question order
- Flip question and answer
Read full descriptionHide full description
Create custom flashcards with images, voice recordings, and multi-language text-to-speech support. Images and audio can be added to both the question and answer sides of your cards. Easily create questions by snapping photos of reference materials, textbook pages, complex math formulas, symbols, or diagrams that are tedious to type. # Study Modes & Features: - Flexible Display Formats: Standard flashcard mode and a list view for quick reviewing. - Customizable Study Options: Cards can be shuffled, in order or reverse order, or flipped (swap questions and answers). - Landscape Support: Fully supports horizontal orientation for comfortable viewing. [Note on Text-to-Speech Settings] The app cannot read aloud text that is in a different language from the selected setting. (For example, if the language is set to "English," any Japanese text on the card will not be read.)
Screenshots
Verdict
AlgoApp and Flashcards by HS both sit at 4.7 stars, but that hides the real split: 93% of Flashcards by HS's written reviews are positive against 50% of AlgoApp's. Flashcards by HS also leads on in-app purchases (none vs 4). AlgoApp's advantage is ads (none vs shown) and update cadence (every 4 days vs every 4 months). On price, rating and iOS requirement 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. AlgoApp sells 4 in-app purchases, starting at $9.99 per month. Flashcards by HS asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for AlgoApp against 4.6 for Flashcards by HS. That said, the two scores are not equally well evidenced: AlgoApp has 20K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 50% of AlgoApp's written reviews are positive against 93% of Flashcards by HS's.
AlgoApp ships an update every 4 days, Flashcards by HS every 4 months. The most recent releases landed on November 5, 2026 and November 2, 2026 respectively.
| Parameter | AlgoApp | Flashcards by HS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (20K ratings) — better | 4.6 (5 ratings) |
| Positive reviews | 49.8% of reviews | 93.4% of reviews — better |
| Number of ratings | 20K — better | 5 |
| Update frequency | Every 4 days — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 51 MB | 22 MB |
| Age rating | 12+ | +4 |
| Developer | AlgoApp Inc | KAZUTERU YOKOI |
Customer experience
AlgoApp
Flashcards by HS
Bugs and requests
AlgoApp
Reported bugs
5 issues- Cards disappearing from decks
- Inability to log in or sync across devices
- Formatting issues when copying/pasting text
- Inconsistent behavior when editing cards
- Frequent app crashes and freezes
Requested features
6 requests- Ability to edit/customize downloaded decks
- Option to review cards in creation order
- Customizable daily study limits
- Global search across all decks
- Markdown support and rich text formatting
Show 1 moreShow fewer
- Improved folder/deck organization tools
Flashcards by HS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AlgoApp
- Unlimited: 1-Month$9.991 Month
- AnkiApp Unlimited$24.991 Year
- Unlimited: 1-Year$29.991 Year
- Unlimited: Lifetime$149.99
Flashcards by HS
No in-app purchases









