Casty vs Feynman AI Study
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Casty
Transform PDF documents into engaging podcasts with live transcripts and a built-in dictionary. Listen offline to educational content in Japanese or English after generation.
- Convert PDFs to podcasts
- Live transcripts
- Built-in dictionary
- Offline listening
- Japanese and English support
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Convert PDF files into educational podcasts in Japanese or English Live transcript with built-in dictionary. Offline listening available after generation.
Feynman AI Study
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Never waste another study session again. Studara uses AI to help you truly understand — not just memorize — any subject. WHAT YOU CAN DO ◆ Feynman Technique Explain a topic back to an AI tutor and instantly find the gaps in your knowledge. The most effective learning method, now in your pocket. ◆ Smart Notes from Anything Upload a PDF, record audio, snap a photo of your textbook, or paste a topic. Studara reads it, summarizes it, and turns it into a full study plan. ◆ Quiz Yourself Auto-generated questions from your own material. Reinforce what you know and expose what you don't. ◆ Flashcards Create and review flashcards built directly from your notes — no manual setup required. ◆ Mind Maps Visualize how concepts connect. See the big picture before diving into the details. ◆ Learning Path A step-by-step roadmap tailored to your material, so you always know what to study next. ◆ AI Question Solver Stuck on a problem? Snap a photo or type it in. Get a clear explanation, not just an answer. HOW IT WORKS 1. Upload your material or choose a topic 2. Pick a study mode — quiz, flashcard, mind map, or chat 3. Study smarter in minutes FREE VS PREMIUM Free: - Create and view notes - Basic import Premium: - Unlimited quiz, flashcard, and mind map generation - Feynman AI tutor sessions - Learning path generation - All import types (PDF, audio, video, photo) - Question solver Stop re-reading the same page. Start actually learning. Download Studara and study smarter today. Privacy Policy: https://www.erkansevim.com/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is in-app purchases: Casty at none against Feynman AI Study's 3. Casty also leads on update cadence (every 2 days vs every 6 days) and device support (3 vs 1). On price and ads 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. Feynman AI Study sells 3 in-app purchases, starting at $6.99 per 7 days. Casty asks for nothing beyond the download.
Casty ships an update every 2 days, Feynman AI Study every 6 days. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.
| Parameter | Casty | Feynman AI Study |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days — better | Every 6 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.5 |
| Further details — not scored | ||
| Size | 23 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Wai Yip Li | Erkan Sevim |
In-app purchases
Casty
No in-app purchases
Feynman AI Study
- Unlimited Access$6.997 Days
- Unlimited Access$14.991 Month
- Unlimited Access3 Days trial$49.991 Year
