FlashZen vs Avorio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FlashZen
This app helps you learn vocabulary and build memory through active recall and spaced repetition. It offers a clean interface, allows custom definitions, and generates practice sentences with corrections. It's designed for efficient, focused study.
- Spaced repetition system
- 800+ high-frequency English words
- Custom definitions and translations
- Sentence generation with corrections
- Clean flashcard interface
- Import custom decks
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With FlashZen you get: • 800+ high-frequency English words • Organized for efficient learning • Clean flashcard interface • Add your own definitions or translations • Generate sentences from known words and get corrections Active recall builds real memory. Built-In Spaced Repetition ---- FlashZen uses spaced repetition to help you: • Review at the perfect time • Strengthen long-term memory • Avoid forgetting • Study efficiently Perfect for: - Students - TOEFL / IELTS prep - Self-learners - Travelers - Vocabulary building ---- Why FlashZen? • No complex setup • No technical interface • Option to import decks • Clean, focused experience • 100% free Open the app. Start learning.
Avorio
This app uses an advanced spaced repetition algorithm to help you study more effectively and remember information longer. It offers AI-powered card creation, offline functionality, and various study formats like cloze deletions and image occlusion. Gamified elements encourage consistent study habits.
- Advanced FSRS-5 scheduling algorithm
- AI-powered card creation from notes
- Offline functionality
- Cloze deletions, image occlusion, LaTeX
- Anki import
- Gamified learning with streaks and XP
- Optional cloud sync
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Most flashcard apps make you choose: a good algorithm buried in an interface from 2009, or something pretty that doesn't use any special techniques. Avorio is an attempt to not make you choose. Under the hood it runs FSRS-5, the scheduling algorithm most serious memory nerds have switched to. In plain terms: it figures out roughly when you're about to forget a card and shows it to you right before that happens. You review less and remember more. That's the whole point of spaced repetition, and Avorio just does it well. It also works without a signal. The whole app runs offline, so a flight or a dead-zone train ride is study time, not lost time. If you want your decks on more than one device, there's sync — completely optional, and off by default. Nothing forces you to make an account. Making cards is usually the part people quit over, so there's AI for that. Paste your notes or a paragraph, and it'll turn them into proper cards you can actually study. Stuck on one? Ask it to explain. The on-device model keeps your stuff private; bigger cloud models are there if you want them. Already deep in Anki? Bring your .apkg files over, scheduling history included. You can also pull cards out of PDFs, Markdown, and Word docs. The cards themselves aren't just front-and-back text: - Cloze deletions for fill-in-the-blank - Image occlusion for diagrams, maps, and anatomy - Real LaTeX for math and physics - Syntax highlighting for code And because it's built natively for Mac and iPhone rather than wrapped-up web, it opens fast and doesn't chew through your battery. There's a lighter side too. You keep a daily streak, earn XP, spend it in a small shop, and a mascot reacts to how you're doing. None of it gets in the way — it's just there to make opening the app a habit instead of a chore. Share a deck with a friend using a single code, or grab a ready-made starter deck if you don't want to build from scratch. If you like tinkering, there's a sandboxed plugin system to extend things. It's a good fit if you're: - Studying for exams, or trying to keep something in your head for years - Learning a language and tired of forgetting vocab - In med school, law, or anything memorization-heavy - A developer drilling syntax and patterns - Just someone who hates relearning things they already learned Terms of Use (EULA): https://www.avorio.ai/legal/eula Privacy Policy: https://www.avorio.ai/legal/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: FlashZen at none against Avorio's 7. FlashZen also leads on iOS requirement (15.1 vs 17.6). Avorio's advantage is ads (none vs shown). On price, rating, ratings volume and update cadence 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. Avorio sells 7 in-app purchases, starting at $3.99 per month. FlashZen asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for FlashZen against 5.0 for Avorio. Both are backed by a comparable volume of ratings — 2 and 4 respectively.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.
| Parameter | FlashZen | Avorio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 29 MB | 187 MB |
| Age rating | 4+ | 4+ |
| Developer | Baptiste Fehrenbach | Cognifer Labs LLC |
Customer experience
FlashZen
Avorio
In-app purchases
FlashZen
No in-app purchases
Avorio
- Avorio Basic$3.991 Month
- Avorio Pro$8.991 Month
- Avorio Max$19.991 Month
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- Avorio Basic Yearly$39.991 Year
- Avorio Pro (Yearly)$89.991 Year
- Avorio Max (Yearly)$199.991 Year
- Avorio AI: Top-up (1m)$4.99









