Comparison

Speech Central vs PDF Dark

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

Head to head
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.

About

PDF Dark

Transform bright PDF pages into a comfortable dark mode for easier reading at night. Reduce eye strain, improve focus, and potentially save battery life. Enjoy a smoother reading experience on your devices.

Highlights
  • Dark mode for PDFs
  • Reduced eye strain
  • Improved focus
  • Battery saving
  • Multi-device support
Features
Read full description

PDF Dark — Night Reading, Without the Pain Tired of burning eyes and sleepless nights from bright PDFs? PDF Dark flips white pages into a smooth black background with crystal-clear text — perfect for late-night reading. Why You’ll Love It Instant Comfort: No more white glare. Read Longer: Less strain, better focus. Sleep Better: Protect your eyes and rest naturally. Battery Saver: Dark pixels use less power. Multi-Device: Works on iPhone, iPad, and Mac. For students, night owls, and professionals who read after dark. Download now — your eyes will thank you.

Screenshots

Speech Central4 screens
PDF Dark4 screens

Verdict

The call

The clearest difference is price: Speech Central at Free against PDF Dark's $3.99. Speech Central also leads on review sentiment (70% vs 25%) and rating (4.6 vs 4.0). PDF Dark's advantage is in-app purchases (none vs 1). On ads and iOS requirement 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; PDF Dark costs $3.99 up front. Speech Central sells 1 one-off in-app purchase. PDF Dark asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Speech Central holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Speech Central has 1.6K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 70% of Speech Central's written reviews are positive against 25% of PDF Dark's.

UpkeepUpdate frequency

Speech Central ships an update weekly, PDF Dark every 11 months. The most recent releases landed on September 24, 2026 and August 25, 2026 respectively.

Scorecard8 real differences · 2 level
Speech Central versus PDF Dark: the parameters behind the verdict, then further details
ParameterSpeech CentralPDF Dark
PriceFree — better$3.99
Rating4.6 (1.6K ratings) — better4.0 (2 ratings)
Positive reviews69.6% of reviews — better25.0% of reviews
Number of ratings1.6K — better2
Update frequencyWeekly — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple TV, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size34 MB1 MB
Age rating4+4+
DeveloperLabsiiJorge Lucioni Charalla

Customer experience

Speech Central

All ratings1,552 ratings
Positive90.3%
Neutral4.3%
Negative5.4%
Written reviews467 reviews
Positive69.6%
Neutral9.4%
Negative21.0%

PDF Dark

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews4 reviews
Positive25.0%
Neutral50.0%
Negative25.0%

Bugs and 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

PDF Dark

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Speech Central

One-time1
  • Speech Central Pro$9.99
None

PDF Dark

No in-app purchases

Questions

Is Speech Central free?
Speech Central is free to download, with in-app purchases available.
Is PDF Dark free?
PDF Dark costs $3.99, with no in-app purchases.
Which has better reviews, Speech Central or PDF Dark?
Speech Central is rated higher. Speech Central averages 4.6 out of 5 from 1.6K ratings, while PDF Dark averages 4.0 from 2 ratings.
Do Speech Central or PDF Dark have ads?
Neither Speech Central nor PDF Dark shows ads.
Which is updated more often, Speech Central or PDF Dark?
Speech Central ships an update weekly, and PDF Dark every 11 months. Most recently, Speech Central was updated on September 24, 2026 and PDF Dark on August 25, 2026.

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