ChromaBoard: LED Sign
Scrolling text marquee display
$0.99 · Designed for iPad. Not verified for macOS.
Turn your phone into a bright LED sign: scrolling text, LED dot-matrix, color flash effects — and link several phones into one big screen.
ChromaBoard turns your iPhone or iPad into an eye-catching full-screen sign.
Cheering at a concert, labeling a stall, guiding guests at an event or posting a quick notice — type your text, pick the look and tap Start.
SCROLLING & STATIC TEXT
• Smooth marquee in four directions, adjustable speed and spacing
• Static text that auto-fits the screen
• Separate fonts for Chinese and Latin text, any text and background color
LED DOT-MATRIX
• LED, round-dot and pixel styles with adjustable dot density
COLOR FLASH
• Pulse, strobe, crossfade, barber pole, palette flow and wave
• Your own palette, speed and direction
MULTI-SCREEN
• Line up several phones and tablets as one big synchronized board
• Join by nearby discovery, QR code or manual address
MORE
• Save and share styles with a QR code
• Text history and emoji
• Full brightness and screen kept awake while playing
• iPhone Duo: two-column editor; stand it half-folded and the top half becomes a sign
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
iPhone Duo support
· Unfolded in landscape, the editor shows the preview and settings side by side
· Half-folded, layouts line up with the fold so nothing sits on the crease
· Stand it half-folded on a table: the top half becomes a sign, the bottom half has pause, speed and text controls
· QR codes for sharing and joining always fit on one half of the screen
Fixes
· Long words in static text now shrink to fit instead of breaking across lines
The developer, 武 杨, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 武 杨
- Size
- 64.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 YANGWU
