Comparison

VO Calendar vs Speech Central

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

Head to head
About

VO Calendar

This weekly calendar app is designed exclusively for VoiceOver users, offering enhanced navigation and smart event summaries. It synchronizes existing events and allows for voice memo recording, providing a streamlined experience for blind and partially sighted individuals.

Highlights
  • VoiceOver optimized navigation
  • Smart event summaries
  • Voice memo recording
  • Automatic event synchronization
  • Customizable gestures
  • Split-screen scanning
Features
Read full description

NOTE: Can only be used together with VoiceOver (for blind and partially sighted people). VO Calendar is a weekly calendar specifically designed to be used with VoiceOver. The result of this VoiceOver-only design is not only a smoother navigation through the app. It also makes it possible for the VoiceOver speech to give smart summaries depending on the context. This prevents you from having to go through each event Individually. Existing events are automatically synchronized. If you prefer not to type, you can record voice memos instead. You can use VO Calendar with the VoiceOver gestures you are used to. However, there is an even faster way. With the screen being split into two halves you can scan the right half of the screen with your right thumb. A single tap with your left thumb then is enough to activate the concerning function. After getting used to you will find out this helps you to browse through your calendar even quicker. The left bottom always contains the ‘Return’ button so you can still reach it with your right thumb (being an L-shaped layout). At the top left you can always find a summary of the current screen content. In case you are left-handed you can swap left and right. Note: If you have multiple calendars configured, VO Calendar will show all concerning events. New events will be assigned to your iPhone’s default calendar. Change the default calendar in: Settings > Mail, Contacts, Calendars > Default Calendar. VO Calendar is developed in cooperation with Royal Dutch Visio, Centre of Expertise for blind and partially sighted people (www.visio.org). We appreciate your opinion and are always interested in hearing from you. Feel free to leave your feedback in the form of a review or contact us at: support@vo-calendar.com In case you have problems recording a memo: - Hold one finger on 'Record memo' button - Use other finger to tap on screen (instead of first focussing on the button and then double tap)

About

Speech Central

This app transforms text from various documents and web pages into speech, offering a distraction-free reading experience. It supports numerous file formats and provides customizable voices, including offline and AI options. Designed for productivity and accessibility, it syncs across Apple devices and offers study tools.

Highlights
  • Optimized PDF & Web Reading
  • Broad Document Support (PDF, EPUB, DOCX)
  • Offline and Cloud AI Voices
  • Cross-device Sync
  • CarPlay & Apple Watch Support
  • Accessibility Profiles
  • Annotation and Export Tools
Features
Read full description

Speech Central has been built for focused, serious reading since 2014. It works across PDFs, web articles, books, and documents. Designed for productivity and accessibility, it combines powerful controls, deep customization, and seamless integration across Apple devices. No subscription. A one-time upgrade unlocks unlimited use. Free access is available for blind users with VoiceOver and for schools deploying the app through Apple School Manager. READING WITHOUT DISTRACTIONS Optimized PDF & Web Reading • Accurate reading order and navigation • Optional cleanup to reduce distractions such as headers, footnotes, citations, and links • RSS support and easy sharing from Safari and other apps Broad Document Support • PDF (including scanned PDFs with two-column layout) • EPUB • Word (.docx) • PowerPoint (.pptx) • OpenOffice formats • HTML, TXT, RTF, Markdown, and more VOICES: OFFLINE AND CLOUD AI • Use high-quality Apple system voices offline • Supports compatible system-wide voices from third-party apps, including offline neural voices from Piper - Neural TTS and ToBe SAID (Pocket TTS) apps • Connect cloud AI voices (OpenAI-compatible APIs, Microsoft Azure, Google Cloud, xAI) using your own API keys • Proprietary enhancement layer improves realism and streaming playback • Optional AI summarization tools help you review content more efficiently BUILT FOR THE APPLE ECOSYSTEM • Sync reading position and playlists across iPhone, iPad, and Mac • CarPlay support for listening and control in your vehicle • Independent Apple Watch app — listen without your iPhone nearby • Optional Health integration to track mindful listening time ACCESSIBILITY FIRST • Dedicated profiles for ADHD, dyslexia, and low vision • Interface and reading behavior adapt for reduced distraction and improved comprehension • Fully accessible with VoiceOver STUDY & KNOWLEDGE TOOLS • Annotate while reading • Export annotated text to .docx • Export text to audio files for offline listening PRIVACY BY DESIGN • No ads • No tracking • No usage analytics WHO USES SPEECH CENTRAL • Students and researchers • Professionals converting reading into listening time • Users who rely on assistive reading tools • Anyone who prefers distraction-reduced, hands-free reading Notes: - Free version limited by the number of daily articles; unlimited access available with Pro upgrade. - Some features require the latest OS version. - License is valid only on iOS/watchOS; separate licenses required for other platforms. - DRM-protected books (e.g. Kindle) are incompatible. - AI features may occasionally perform unexpectedly.

Screenshots

VO Calendar4 screens
Speech Central4 screens

Verdict

The call

The clearest difference is price: Speech Central at Free against VO Calendar's $3.99. Speech Central also leads on update cadence (every 9 days vs every 2 months) and ratings volume (1.6K vs 8). VO Calendar's advantage is in-app purchases (none vs 1) and review sentiment (94% vs 69%). On rating 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

CostPrice · In-app purchases · Ads · Monetization

Speech Central is free to download; VO Calendar costs $3.99 up front. Speech Central sells 1 one-off in-app purchase. VO Calendar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for VO Calendar against 4.6 for Speech Central. That said, the two scores are not equally well evidenced: Speech Central has 1.6K ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 94% of VO Calendar's written reviews are positive against 69% of Speech Central's.

UpkeepUpdate frequency

VO Calendar ships an update every 2 months, Speech Central every 9 days. Both last shipped on October 23, 2026.

Scorecard8 real differences · 2 level
VO Calendar versus Speech Central: the parameters behind the verdict, then further details
ParameterVO CalendarSpeech Central
Price$3.99Free — better
Rating4.6 (8 ratings) — better4.6 (1.6K ratings)
Positive reviews93.8% of reviews — better69.3% of reviews
Number of ratings81.6K — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, Apple TV, Apple Watch — better
Requires iOS15.0 — better17.0
Further details — not scored
Size1 MB34 MB
Age rating4+4+
DeveloperTom van ZummerenLabsii

Customer experience

VO Calendar

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews16 reviews
Positive93.8%
Neutral0.0%
Negative6.3%

Speech Central

All ratings1,558 ratings
Positive90.4%
Neutral4.2%
Negative5.5%
Written reviews469 reviews
Positive69.3%
Neutral9.4%
Negative21.3%

Bugs and requests

VO Calendar

Not enough reviews yet to summarise bugs or requests.

Speech Central

Reported bugs

6 issues
  • Crashes when changing advanced settings
  • Inconsistent behavior when importing documents
  • Fails to recognize some file formats
  • Playback issues with high-speed mode
  • Repeating chapters unexpectedly
Show 1 more
  • Scrolling issues with long documents

Requested features

8 requests
  • Add more natural-sounding voices
  • Improve chapter/section navigation
  • Allow custom pronunciation of words
  • Add support for more languages
  • Integrate with Bookshare library
Show 3 more
  • Improve PDF formatting and layout
  • Add more customization options
  • Improve sync between devices

In-app purchases

None

VO Calendar

No in-app purchases

1 purchases

Speech Central

One-time1
  • Speech Central Pro$9.99

Questions

Is VO Calendar free?
VO Calendar costs $3.99, with no in-app purchases.
Is Speech Central free?
Speech Central is free to download, with in-app purchases available.
Which has better reviews, VO Calendar or Speech Central?
VO Calendar is rated higher. VO Calendar averages 4.6 out of 5 from 8 ratings, while Speech Central averages 4.6 from 1.6K ratings.
Do VO Calendar or Speech Central have ads?
Neither VO Calendar nor Speech Central shows ads.
Which is updated more often, VO Calendar or Speech Central?
VO Calendar ships an update every 2 months, and Speech Central every 9 days. Most recently, VO Calendar was updated on October 23, 2026 and Speech Central on October 23, 2026.

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