Prism Notes vs OpenVox Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prism Notes
Capture thoughts and links quickly with a familiar texting interface. Organize ideas with AI-suggested tags and develop them across linked threads. Review notes to keep what matters and easily search by keyword or meaning.
- Texting-like note capture
- AI-suggested tags
- Threaded idea development
- Review mode for notes
- Sync across devices
- Natural language reminders
- Lock screen capture
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Prism is the private place for quick thoughts and links. It feels like texting, rather than writing in a document. Capture easily, organize with tags, develop ideas across threads, review to keep only what matters. Free to try! Features: - Private and on-device - Opt in to iCloud sync between iPhone and Mac - Voice transcription and voice memos - Lock screen widgets for text and voice capture - AI-suggested tags to make organizing easy or automatic AI tagging (requires apple intelligence) - Review mode to keep notes alive or let them go - Threads to evolve a thought and link them together - Search by keyword - Natural language reminders - just say "remind me tomorrow at 2pm" (requires apple intelligence)
OpenVox Reader
Transform any text into natural-sounding audio for offline listening. Import books, PDFs, documents, and web links. Choose from hundreds of voices, adjust playback speed, and save important sentences. Keep your documents private with local processing.
- Text to audio conversion
- Offline listening
- Import ebooks, PDFs, documents, web links
- Hundreds of natural voices
- Custom voice creation
- Adjustable playback speed
- Save important sentences
- In-document search
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Turn Reading Time into Listening Time OpenVox Reader transforms books, PDFs, documents, web links and text into natural-sounding audio, so you can keep reading while commuting, walking, exercising, resting or working. Import your content, choose from hundreds of voices, create your own custom voice, and listen at your preferred speed without sending your private documents to an online speech service. Listen to Almost Anything Bring all your reading into one simple library: • Import ebooks and PDFs • Add documents and text files • Save web links for listening • Scan printed pages • Paste or type text directly • Organize everything in one place OpenVox Reader can generate and play speech locally on your device, so once the required voices are downloaded, you can listen without an internet connection. Natural Voices You’ll Enjoy Choose from more than 200 voices across 30+ languages and find the voice that best suits your book, article or document. You can also create custom voices for English, German, Italian, Portuguese, and Spanish from a short voice sample using Pocket TTS and listen to your content in a voice you choose. Listen at Your Own Pace Adjust playback from 0.5x all the way to 2.5x with smooth, pitch-preserving audio. Choose convenient presets including: • 0.5x • 1.0x • 1.5x • 2.0x • 2.5x Faster playback is supported with optimized buffering and accurate elapsed and remaining-time calculations. Save Important Sentences Found something worth coming back to? Bookmark the sentence you are currently reading and access it anytime from Saved Sentences. You can: • Save or remove sentences instantly • Browse all saved passages • Filter your saved sentences • Jump directly back to the original location • Delete bookmarks you no longer need Search Inside Your Documents Quickly find words, phrases or sections without scrolling through an entire book or document. Search in Document provides result previews and lets you jump directly to each matching location. EPUB search is optimized chapter by chapter to keep memory usage efficient even with larger books. Listen Without an Internet Connection Keep listening on flights, trains, commutes or anywhere without reliable internet access. Speech generation happens locally, allowing downloaded voices and imported content to remain available when you need them. Private by Design Your documents are processed locally for speech generation rather than being uploaded to a cloud TTS service. OpenVox Reader is built for people who want convenient AI-powered reading while keeping control of their content. Track Your Reading Journey See how much you have actually listened and keep your reading momentum going with: • Listening time • Daily and weekly progress • Reading streaks • Recently opened content • Personal listening statistics Reading time is calculated from audio that was actually spoken, giving you a accurate picture of your listening activity. Made for iPhone and iPad Use OpenVox Reader across iPhone and iPad with iCloud sync for your library. Your content stays organized across your Apple devices, and one purchase unlocks the app on both iPhone and iPad. Read More, Even When You’re Offline Whether you’re travelling, exercising, relaxing, commuting or getting work done, OpenVox Reader helps turn spare moments into meaningful reading time. Download OpenVox Reader and start listening to your reading today.
Screenshots
Verdict
The clearest difference is update cadence: Prism Notes at every 3 days against OpenVox Reader's weekly. Prism Notes also leads on ratings volume (39 vs 6) and device support (4 vs 2). On price, rating, review sentiment 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. Prism Notes sells 2 one-off in-app purchases and OpenVox Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for Prism Notes against 4.8 for OpenVox Reader. That said, the two scores are not equally well evidenced: Prism Notes has 39 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Prism Notes ships an update every 3 days, OpenVox Reader weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Prism Notes | OpenVox Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (39 ratings) — better | 4.8 (6 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 39 — better | 6 |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 172 MB |
| Age rating | 4+ | 4+ |
| Developer | Tommy Joseph | Nitesh Kumar Sharma |
Customer experience
Prism Notes
OpenVox Reader
In-app purchases
Prism Notes
- Lifetime Unlock$6.99
- Lifetime Unlock$12.99
OpenVox Reader
- OpenVox Reader Pro Lifetime$14.99









