Comparison

OpenVox Reader vs SumDoc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

SumDoc

Features
Read full description

SumDoc opens and edits Word documents on your device. The editor runs on the same native DOCX engine that powers SumOffice on the desktop and on the server — so a document looks and behaves the same wherever you open it. No re-rendering, no drift between what you see on the phone and what your colleague sees on a laptop. WHAT IT DOES • Opens .docx and .docm files — from the Files app, mail, or any app’s “Open in…” • Edits text, applies styles and formatting with the familiar ribbon • Edits pictures: wrap, crop, borders and effects • Keeps the document structure intact — tables, lists, page layout • Built-in assistant: ask how to do something and get the steps, in your language • Report a problem in two taps — your report gets a number and a status right in the app YOUR FILES STAY YOURS Editing happens on the device. Documents are not uploaded anywhere, and the app does not require an account to open a file. Only what you send to support leaves the phone — see the privacy policy. PART OF SUMOFFICE SumOffice is an office suite built around one document engine: the same logic in a desktop application, inside your own product, on a server, and here on the phone. SumSheet is its spreadsheet counterpart. SumOffice is an independent product and is not affiliated with Microsoft. Learn more: https://sumoffice.com Privacy Policy: https://sumoffice.com/app-privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OpenVox Reader4 screens
SumDoc4 screens

Verdict

The call

The clearest difference is in-app purchases: SumDoc at none against OpenVox Reader's 1. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OpenVox Reader sells 1 one-off in-app purchase. SumDoc asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 days. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 9 level
OpenVox Reader versus SumDoc: the parameters behind the verdict, then further details
ParameterOpenVox ReaderSumDoc
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 6 daysEvery 6 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size200 MB68 MB
Age rating4+4+
DeveloperNitesh Kumar SharmaHEALTH INFORMATIC SECURITY SYSTEM, S.L.

In-app purchases

1 purchases

OpenVox Reader

One-time1
  • OpenVox Reader Pro Lifetime$14.99
None

SumDoc

No in-app purchases

Questions

Is OpenVox Reader free?
OpenVox Reader is free to download, with in-app purchases available.
Is SumDoc free?
SumDoc is free to download, with no in-app purchases.
Do OpenVox Reader or SumDoc have ads?
Neither OpenVox Reader nor SumDoc shows ads.
Which is updated more often, OpenVox Reader or SumDoc?
OpenVox Reader ships an update every 6 days, and SumDoc every 6 days. Most recently, OpenVox Reader was updated on October 6, 2026 and SumDoc on October 7, 2026.

Other comparisons