OpenVox Reader vs undervoice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
undervoice
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undervoice is a quiet speech-to-text and voice-typing app for Mac. Speak softly into your iPhone; what you say in English is transcribed locally on the Mac and inserted at the active cursor in Codex, Claude Code, Xcode, Terminal, a browser, or another text field. It is built for developers and knowledge workers who want the speed of dictation without giving the whole office a performance. Explain a bug, talk through an edge case, or capture a half-formed idea in an AI prompt while it is still fresh—even at a shared desk. WHY USE IPHONE? Your Mac’s built-in microphone may be roughly 20–30 inches from your mouth. Your iPhone can be just 2–4 inches away. That closer starting point gives speech recognition a cleaner signal before keyboard noise, ventilation, and nearby conversations compete with your voice. There is no external microphone to buy, wait for, or set up. HOW IT WORKS 1. Install undervoice on iPhone and Mac. 2. Download the English recognition pack on your Apple Silicon Mac and pair once. 3. Put the cursor where you want the text, hold to talk on iPhone, then release. OPTIMIZED FOR ENGLISH undervoice uses a dedicated English recognition path on Mac. The model, local runtime, and product settings are selected for natural English dictation—from quick instructions to long, detailed coding prompts. English is the language being optimized here, not one item in a generic multilingual feature list. DESIGNED FOR QUIET WORK • Close-range capture for low-volume speech • Local recognition on your paired Mac • A dedicated English recognition path for natural speech and long-form dictation • Direct insertion at the active cursor—no copy and paste • End-to-end encrypted audio, transcripts, and control messages • Audio processed in memory, never saved as recording files • No undervoice speech cloud • Screen Protection uses Dark Mode, lowers brightness to 30%, and softens the recording button while the app is active • A minimal interface that stays out of your coding flow • Optional local transcript history; nothing syncs to an undervoice server PRIVATE BY DESIGN On a local network, audio goes directly from iPhone to the paired Mac, where recognition runs locally. No audio file is left on either device. Password fields and Secure Keyboard Entry are excluded. If focus changes during dictation, insertion stops. REQUIREMENTS Requires iOS 18 or later and macOS 14 or later. Paired iPhone recognition requires an Apple Silicon Mac. Both apps are required. Get the Mac companion and setup guide at undervoice.net/en/download. undervoice is not a chatbot and does not rewrite your ideas. It simply gives your voice a shorter, quieter path into the tools you already use. TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
OpenVox Reader and undervoice are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. OpenVox Reader sells 1 one-off in-app purchase and undervoice sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | OpenVox Reader | undervoice |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 172 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitesh Kumar Sharma | 东景 梁 |
In-app purchases
OpenVox Reader
- OpenVox Reader Pro Lifetime$14.99
undervoice
- Lifetime$59.99









