Synapsi vs Stormiz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Synapsi
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Most study apps make the flashcards. Synapsi checks you actually learned them. Turn any lecture, PDF, or YouTube video into AI flashcards, a quiz, a summary, and a mind map in seconds. Then prove you know it: Synapsi runs real spaced repetition and an AI-judged Feynman teach-back that grades whether you can explain the idea in your own words. MORE SOURCES, SAME STUDY KIT Synapsi also reads web articles and short video links from TikTok, Instagram, X, and Facebook. Paste the link, get the transcript and the full study kit. Free tools (transcript, summarizer, flashcard maker) live at synapsi.guru/tools and need no account. Synapsi is free to download and includes a free preview: your first study kit, with a sample of its flashcards, quiz, and summary. Full study kits and the AI study tools below require a Synapsi Pro subscription or one-time lecture credits. WHAT SYNAPSI DOES (requires Pro or lecture credits) AI flashcard maker: auto-generate flashcards from any source. PDF to flashcards, YouTube to flashcards, lecture notes to flashcards. Spaced repetition that works: a real SM-2 system schedules reviews at the right time so facts stick. Built for exam prep and revision. Quiz generator: turn your notes into a practice quiz with instant feedback. AI summarizer: get a clean summary of a long PDF or hour-long lecture in seconds. Mind map generator: see how ideas connect with a visual mind map of your material. YouTube transcript and notes: pull the transcript from any video and turn it into study notes, flashcards, and a quiz. Feynman teach-back: explain a concept, and the AI judges your answer against the source and shows your gaps. If you can't explain it, you haven't learned it yet. AI study chat: ask questions about your own notes and get answers with citations. Smart reminders: one nudge a day, built from what is actually due. Set an exam date and Synapsi counts down to it. PERFECT FOR - Students cramming for exams and finals - College and university revision - Med, law, and language learners - Anyone who reads PDFs or watches lectures and wants to remember them WHY IT WORKS Making flashcards feels like studying. It isn't. Real learning is recall and explanation. Synapsi uses spaced repetition to make you recall and the Feynman technique to make you explain. Stop highlighting. Stop re-reading. Start proving you learned it. SUBSCRIPTION & CREDITS Synapsi is free to download. Your first study kit is a free preview. Full access requires a purchase: - Synapsi Pro: unlimited notes and every study tool. An auto-renewable subscription billed monthly or yearly (a one-time Lifetime option is also available). Your subscription renews automatically unless canceled at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. - Lecture credits: one-time purchases. One credit buys one full lecture's study kit, with no subscription. The current prices and lengths are always shown on the purchase screen before you buy. TERMS & PRIVACY Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://synapsi.guru/privacy
Stormiz
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Stormiz is a notebook that listens to your lecture and writes with you. RECORD THE LECTURE Start recording when the lecture starts and put your phone in your pocket — recording keeps going with the screen locked, so a two-hour lecture survives your auto-lock timer. Stormiz transcribes what was said and lays it out as notes, split idea by idea, with the audio kept alongside so you can hear any passage again. WRITE, AND ASK FOR HELP WHEN YOU WANT IT Your page has no bottom. Type "/" to reach the assistant: rephrase, correct, write up, structure, continue the sentence you started. Every suggestion arrives as a proposal with the change shown — you accept it or you throw it away. Nothing is rewritten behind your back, and nothing happens unless you ask. ASK YOUR NOTEBOOK Ask a question and get an answer built from your own notes and the sources you added, not from the open internet. Or switch to Quiz me and let it question you on what you wrote. REVISE WHAT YOU ACTUALLY WROTE Turn a passage into cards in one gesture and practise them, with the paragraph they came from one tap away. EVERY LECTURE IN ITS OWN NOTEBOOK Notebooks, folders, and a page that keeps its formatting: headings, tables, callouts, columns, code, page breaks. Export a page or a whole notebook to PDF. WORKS OFFLINE Write on the train. It syncs when you are back. IN SIX LANGUAGES English, French, Dutch, German, Spanish and Italian. The interface follows your device's language, and you can switch it whenever you like. — Stormiz is free to use. Stormiz Max is an optional auto-renewable subscription that unlocks the AI features with a monthly credit allowance: • Stormiz Max — Monthly: $9.99 per month • Stormiz Max — Annual: $34.99 per year Prices are in U.S. dollars and may vary by region; the price shown in the app at purchase is the one that applies. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your Apple Account is charged for renewal within 24 hours of the end of that period. You can manage and cancel your subscription in your Apple Account settings after purchase. Terms of Use: https://stormiz.com/cgu Privacy Policy: https://stormiz.com/confidentialite Support: https://stormiz.com/support
Screenshots
Verdict
The clearest difference is in-app purchases: Synapsi at none against Stormiz's 5. Stormiz's advantage is iOS requirement (15.1 vs 18.0). On price, ads 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
Both are free to download. Stormiz sells 5 in-app purchases, starting at $8.99 per month. Synapsi asks for nothing beyond the download.
| Parameter | Synapsi | Stormiz |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 81 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Khoa Tran | Studizy |
In-app purchases
Synapsi
No in-app purchases
Stormiz
- Stormiz Max — Mensuel$8.991 Month
- Stormiz Max — Annuel$29.991 Year
- 150 crédits$3.99
- 300 crédits$8.99
- 600 crédits$12.99









