Distance, spacing, contrast, and clarity support work together instead of staying fixed.
Ecosystem / Prexbi
Private access
iPhone + Android
On-device privacy
Read with more clarity. Stay with the line.
Prexbi turns the phone into an adaptive digital lens for reading with more clarity and less visual effort.
Guided calibration, distance-aware adjustment, Fusion Assist, FlowFocus, OCR, PDF reading, library tools, and text-to-speech come together in a reading experience that feels modern, calm, and accessible.
Built for readers 40+, people dealing with visual fatigue, and anyone who wants steadier reading comfort on mobile. Some features vary by device and platform.
Prexbi does not store photos or video of the person using the app.
FlowFocus, OCR, PDF reading, library tools, and TTS support continuity across sessions.
Calibration
Comfort range set in a guided flow.
Prexbi helps define a readable distance and preferred clarity profile before the session begins.
Fusion Assist
Clarity support for light ghosting while reading.
Built to support readability, not to diagnose or treat a visual condition.
Library + OCR
Bring in scans, PDFs, and saved reading sessions.
Continue reading without switching to a cluttered workflow.
Privacy
On-device processing. No stored photos or video.
Local settings stay under the user's control and can be reset on the device.
Reading Friction
Reading on a screen should not mean moving closer, forcing focus, or losing your place.
Prexbi is designed for the moments when phone reading starts to feel heavier than it should.
What readers often notice
Mobile reading strain is not just about text size. It comes from the mix of distance, spacing, clarity, contrast, line tracking, and the effort needed to keep reading comfortably across longer sessions.
Holding the phone closer than before
What used to feel natural now asks for more proximity just to keep text readable.
Losing the line mid paragraph
Reading breaks when the eyes need extra effort to rejoin the active line.
Seeing light ghosting on text
Some readers notice mild double contours or unstable edges during high-contrast reading.
Feeling visual fatigue earlier
Longer phone reading sessions can start to feel tiring even when the content itself is simple.
How It Works
A calmer reading workflow, in four clear steps.
Prexbi is built to reduce setup friction while keeping the reading experience precise and easy to understand.
01
Calibration view
Calibrate for your comfortable range.
Guided setup helps define distance, clarity preferences, and the feel of the reading session.
02
Reader view
Open text, PDFs, scans, or saved sessions.
Bring reading into one place with OCR, PDF handling, and a library that keeps materials organized.
03
Adaptive view
Let Prexbi adjust the reading experience.
Typography, spacing, and clarity support respond to the user's setup and supported device capabilities.
04
Flow view
Keep reading with less interruption.
FlowFocus helps return to the line, while text-to-speech can take over when visual effort needs a break.
What Supports Clarity
Built for comfort, continuity, and everyday reading tasks.
Each feature is designed to support a more readable phone experience without drifting into clinical claims.
Adaptive Reading
A reading mode shaped around clarity, spacing, contrast, and comfort so the page feels calmer and easier to sustain.
Visual cue: a primary reading surface with stable line rhythm and controlled emphasis.Distance-aware adjustment
On supported devices, Prexbi can adapt the reading experience to the user's reading distance instead of leaving typography fixed.
Visual cue: live distance status and comfort-range calibration cards.Fusion Assist
A clarity aid for light ghosting or mild double contours that can appear during reading.
FlowFocus
Helps the reader return to the active line with less searching and less stop-start friction.
OCR + PDF reading
Bring printed text, scans, or PDFs into a cleaner reading view without switching tools.
Text-to-speech
Move from visual effort to listening while keeping your place and staying inside the same workflow.
Library
Keep reading sessions, imported files, and recurring documents together in one organized space.
Privacy on-device
Processing stays local and the app does not store photos or video of the user.
Privacy And Trust
Designed to support reading comfort, with privacy built into the experience.
Prexbi is meant to help people read with more comfort and continuity. It is not a medical device and does not provide diagnosis.
What stays local
Adaptive reading, distance handling, and user settings are designed around on-device processing.
- On-device processing for calibration and adaptive reading functions.
- No photos or video stored from the person using the app.
- Local preferences can be reset from the device.
- Privacy-first design without turning the reader into a data source.
For legal and operational details, the product links to a dedicated privacy policy and support channel.
What Prexbi is and is not
Prexbi supports reading clarity and accessibility. It should not be framed as medical treatment.
- Supports reading comfort, continuity, and accessibility-oriented adjustments.
- Does not diagnose, treat, cure, or prevent visual or medical conditions.
- Does not replace prescribed lenses, clinical advice, or professional eye care.
- Some capabilities depend on device hardware, OS version, and platform support.
The product language focuses on clearer reading, less effort, and user-controlled privacy.
Built For Platform Reality
iPhone and Android support the same goal, with platform-specific behavior where it makes sense.
Prexbi keeps the reading promise consistent while respecting how each platform handles sensors, typography, and accessibility settings.
Distance-aware adaptive reading
Designed around guided calibration and adaptive reading that can respond to supported iPhone capabilities.
- Guided calibration for comfortable reading range.
- Distance-aware adjustment on supported hardware.
- Fusion Assist and FlowFocus inside the reader experience.
- OCR, PDF reading, library tools, and text-to-speech support.
Adaptive reading with flexible system support
Adaptive reading stays central, with optional sync to supported system settings on compatible devices.
- Adaptive controls for clarity, spacing, and reading comfort.
- Optional sync with supported system text or display settings where available.
- OCR, PDF reading, library tools, and text-to-speech support.
- Availability can vary by device maker, OS version, and platform capabilities.
Feature availability may vary by device, operating system version, and platform capabilities.
Built For Trust
Built for real reading comfort.
Prexbi is being shaped for readers, caregivers, accessibility-minded teams, and structured early feedback.
Made for actual reading sessions.
Messages, articles, PDFs, forms, scanned pages, and long mobile reading sessions all fit the product story.
Ready for guided pilots and feedback loops.
Prexbi is structured for onboarding, observation, iteration, and careful rollout instead of noisy mass launch claims.
Space for testimonials, partners, and specialist input.
This section is ready for future pilot feedback, partner references, and accessibility or clinician-adjacent review.
Questions, Answered
Clear answers for a product that should stay easy to understand.
Is Prexbi a medical device?
No. Prexbi is a reading support and accessibility app. It is not a medical device and should not be presented as diagnosing, treating, curing, or preventing medical or visual conditions.
Does it replace glasses?
No. Prexbi is designed to support reading comfort on the phone. It does not replace prescribed lenses or professional eye care.
Does it store camera images?
No. Prexbi is designed for on-device processing and does not store photos or video of the person using the app.
Can I read PDFs and scanned documents?
Yes. Prexbi is designed to support PDFs, OCR workflows, scanned documents, and a library that keeps reading sessions organized.
Is it available on iPhone and Android?
Yes. Prexbi is being designed for iPhone and Android, with some features varying by device, operating system, and platform support.
Bring clarity, comfort, and privacy back to mobile reading.
Prexbi helps reading feel steadier with adaptive adjustment, guided setup, accessible tools, and on-device privacy from the start.