Speech Central vs BIFF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
BIFF
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BIFF is a behavior-aware planner with receipts. The free plan lets you schedule up to 5 task blocks per day. BIFF Plus is an auto-renewable subscription that unlocks unlimited daily task blocks when five is not enough. BIFF tracks the gap between what you planned and what you actually did, then adapts future scheduling around your real patterns. The live scoring path stays deterministic and inspectable, so recommendations can explain themselves instead of feeling random. BIFF is not a generic calendar. It notices overloaded days, fake morning plans, repeat misses, and the slots you keep ignoring. It keeps score, surfaces the pattern, and lets you edit everything manually. Free BIFF includes: • planning up to 5 task blocks per day • manual tasks, recurring tasks, and work schedule setup • task instances with done, snooze, skip, and reschedule tracking • planner and receipts views with behavior-aware recommendations • explanation text and score breakdowns for optimizer moves • weekly recap and behavior stats built from actual task history BIFF Plus includes: • unlimited daily task blocks • Apple-managed purchase, cancellation, and restore BIFF does not use an LLM in the live scheduling loop. Scheduling remains deterministic. Future model work is still shadow-only, and the current product logic is heuristic-first and fully explainable. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://biff-site.vercel.app/privacy
Screenshots
Verdict
The clearest difference is update cadence: Speech Central at every 9 days against BIFF's every 5 weeks. Speech Central also leads on device support (4 vs 2). BIFF's advantage is iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases 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. Speech Central sells 1 one-off in-app purchase and BIFF sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Speech Central ships an update every 9 days, BIFF every 5 weeks. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.
| Parameter | Speech Central | BIFF |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.6K ratings) — better | — |
| Positive reviews | 69.3% of reviews | — |
| Number of ratings | 1.6K — better | — |
| Update frequency | Every 9 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple TV, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 34 MB | 34 MB |
| Age rating | 4+ | 9+ |
| Developer | Labsii | Shawarma Mia Corp |
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
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- 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
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- Improve PDF formatting and layout
- Add more customization options
- Improve sync between devices
BIFF
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Speech Central
- Speech Central Pro$9.99
BIFF
- BIFF Plus Monthly$4.991 Month
- BIFF Plus Yearly$19.991 Year









