DR vs Casty
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DR
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DR-Annotate – Your Documents, Available Anytime and Interactive Flexible, efficient, and secure – with **DR-Annotate**, you and your authorized users have all your information at your fingertips, wherever you are. Upload your documents to your cloud and distribute them to the target groups you define. Whether training materials, product information, or sales documents – you decide what is available, when, and who can access it. Interactive Documents: * Create your own notes, set bookmarks, or mark pages with dog-ears * Use freehand drawing, highlighters, or comment boxes * All annotations are stored separately from the original document and automatically backed up online as soon as an internet connection is available HTML5 Content Offline: * Provide dynamic HTML5 content and make it available offline * Users can access these interactive contents anytime, even without an internet connection * Perfect for training, presentations, or complex documents with interactive elements Secure & Reliable: * All documents are encrypted during transfer and decrypted in the app * Device change or loss? No problem – all data can be transferred to a new device and restored Recommended: Apple Pencil or stylus for iPad Pro Digital Tests: * Supports Free Text, Single Choice, and Multiple Choice questions * Up to 5 answer options per question, including image support Try it now: Connect to our demo cloud, test all features, and see how easy DR-Annotate is to use. For information on your own cloud, licenses, or support, contact service@dr-b.eu.
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.
Screenshots
Verdict
The clearest difference is update cadence: Casty at every 2 days against DR's every 2 months. Casty also leads on device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
DR ships an update every 2 months, Casty every 2 days. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.
| Parameter | DR | Casty |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 12 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Dirk Rutz Bildungsloesungen GmbH | Wai Yip Li |
In-app purchases
DR
No in-app purchases
Casty
No in-app purchases









