DeTeXt vs Feyn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeTeXt
Easily find LaTeX commands for symbols by drawing them or searching a comprehensive database. Get the exact command you need for your documents without memorization.
- Draw symbols to find LaTeX commands
- Neural image classification for symbol recognition
- Searchable database of 1098 symbols
- Supports Apple Pencil on iPad
- Copy commands, symbols, or Unicode codepoints
- Offline symbol database
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Finding the symbol you want to use in LaTeX can be hard since you can't memorize all the commands and packages for every symbol. DeTeXt tries to solve this problem by giving you two ways to find the command you want: - Draw the symbol you want and DeTeXt's neural image classification engine will identify what it thinks are the 20 most likely LaTeX commands that will generate a symbol closest to the one you drew. DeTeXt supports Apple Pencil drawings on the iPad. - Search the entire symbol set of 1098 symbols from packages like tipa, amsmath, amssymb, textcomp and more, in addition to the default mathematical symbols. - Copy the symbol, or the character itself, or its Unicode codepoint to the system clipboard, to paste anywhere else. DeTeXt's neural engine processes your drawn symbol and finds the best matches in its symbol database, all on your device without requiring you to be online. All the symbols are stored within the app as well.
Feyn
Create and review flashcards by drawing with your Apple Pencil or typing. Utilize spaced repetition for effective memorization on your iPhone or iPad. Share decks with friends and sync across devices via iCloud.
- Handwritten flashcard creation with Apple Pencil
- Spaced repetition learning system
- Cross-device synchronization via iCloud
- Flashcard sharing with friends
- Image and text input options
- iOS Quick Note and Handoff support
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Use flashcards, spaced-repetition, and your Apple Pencil to study with Feyn! Taking your own notes by hand and spaced-repetition are the best way to learn new concepts, and with Feyn you can do just that. Open up a book on your iPad and comfortably draw your flashcards right there using your Apple Pencil in Feyn. The flashcards are phone-sized so that you can then take them on the go and comfortably review them on your iPhone! Their vertical shape also makes them easy to write while multi-tasking on your iPad, and perfect for learning languages written top to bottom like Japanese. If you don't feel like drawing, just type some text using your keyboard or drop images into your flashcards. In this way, you *learn* on your iPad as you think of how to you summarize new concepts into flashcards, and *memorize* on your iPhone while you review them on the go! Feyn is fully featured, you can share flashcard to study with your friends. Your flashcards will automatically synchronize between your devices using your iCloud drive. Feyn also supports iOS' Quick Note, Handoff, and keyboard input: type away on your iPad or on our macOS app! Feyn uses spaced repetition to aid in learning. It will ask you to review flashcards depending on how well you recall them, flashcards you miss will be asked more often, and flashcards you get right less often. This way you minimize the total time you spend studying and maximize retention! Feyn Pro ads some nice to have extra features like study charts, to see how well you're learning, and flashcard importing. All other features are free and unrestricted. We guarantee that you will always be able to have a complete study experience for free. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: DeTeXt at 4.9 against Feyn's 4.3. DeTeXt also leads on in-app purchases (none vs 3) and review sentiment (92% vs 80%). Feyn's advantage is update cadence (every 9 days vs every 2 months) and iOS requirement (16.1 vs 26.0). On price, ratings volume, 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. Feyn sells 3 in-app purchases, starting at $5.99 per month. DeTeXt asks for nothing beyond the download.
DeTeXt holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 40 and 91 respectively. Written reviews point the same way: 92% of DeTeXt's written reviews are positive against 80% of Feyn's.
DeTeXt ships an update every 2 months, Feyn every 9 days. The most recent releases landed on July 3, 2026 and September 27, 2026 respectively.
| Parameter | DeTeXt | Feyn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (40 ratings) — better | 4.3 (91 ratings) |
| Positive reviews | 92.3% of reviews — better | 80.0% of reviews |
| Number of ratings | 40 | 91 — better |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, Mac, Vision Pro — better | iPhone, iPad, Mac |
| Requires iOS | 26.0 | 16.1 — better |
| Further details — not scored | ||
| Size | 22 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Venkata Subrahmanyan Govindarajan | Joaquin Alori |
Customer experience
DeTeXt
Feyn
Bugs and requests
DeTeXt
Not enough reviews yet to summarise bugs or requests.
Feyn
Reported bugs
3 issues- Cards sometimes disappear after updates
- App crashes on iOS 16 devices
- Palm rejection issues when writing
Requested features
6 requests- Add option to import/export flashcards
- Implement more review modes (e.g., front-to-back, back-to-front)
- Introduce a zoom function for better writing experience
- Add support for adding images/diagrams to cards
- Implement nested folder structure for better organization
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- Provide more customization options for cards (colors, layouts, etc.)
In-app purchases
DeTeXt
No in-app purchases
Feyn
- Feyn Pro (1 Month)7 Days trial$5.991 Month
- Feyn Pro (6 Months)7 Days trial$19.996 Months
- Feyn Pro (1 Year)7 Days trial$29.991 Year









