EDF & BDF Viewer
Waveform file inspector
Free · In‑App Purchases
Open EDF and BDF recordings on iPad and Mac. Browse every channel, tap to read exact values, and inspect the full file header.
EDF & BDF Viewer opens biosignal recordings stored in the European Data Format (EDF, EDF+) and the BioSemi Data Format (BDF) — the file formats used across sleep, EEG, ECG and electrophysiology research.
One app for iPad and Mac. No installer, no Java, no Python environment, no account. Open a file and look at your data.
VIEW YOUR RECORDING
• All-Channels montage — every channel stacked in one scrollable view.
• Channel browser showing sample rate and physical unit at a glance.
• Min/max envelope rendering, so a spike is never lost to naive decimation the way simple downsampling loses it.
• On iPad, pinch to zoom and swipe horizontally with two fingers to move through time. On Mac, swipe with two fingers on a trackpad, drag, or use ⌘+, ⌘- and the arrow keys.
• Tap anywhere to place a measurement cursor and read the exact time and amplitude at that point.
• Fixed amplitude scales as well as auto-fit, so a quiet stretch and a loud one can actually be compared instead of both filling the pane.
• Time and amplitude grid with labelled axes.
KNOW WHAT IS IN THE FILE
• A full header inspector: format and version, start date and time, record layout, and every signal's sample rate, physical unit, physical range and digital range.
• Correct digital-to-physical calibration for both 16-bit EDF and 24-bit BDF.
OPEN FILES FROM ANYWHERE
• Open in place from the Files app on iPad, or double-click in the Finder on Mac.
• Drag a recording onto the window.
• Recent files reopen without hunting for the folder again.
• A synthetic demo recording is built in, so there is something to look at before you have a file of your own.
FREE TO DOWNLOAD, OPTIONAL ONE-TIME PRO PURCHASE
The app is a free download, and everything above stays free: opening files, every view, the measurement cursor and the header inspector. Export is a single optional in-app purchase, EDF Viewer Pro, bought once with no subscription. It adds the current view as a PNG image, the visible window as CSV at full sample resolution, and the complete file header as text. A purchase made on iPad also unlocks Pro on Mac, and Restore Purchases is always available.
PRIVACY
No accounts, no analytics, no network features of any kind. Files you open never leave your device, and the developer cannot see them.
IMPORTANT
EDF & BDF Viewer is a file-viewing utility for research, educational, and engineering use. It is not a medical device and is not intended for diagnosis, treatment, or any clinical decision-making.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• New: Export, unlocked by EDF Viewer Pro, an optional one-time in-app purchase. Save the current view as a PNG image, the visible window as CSV at full sample resolution, or the complete file header as text.
• Viewing stays free: the montage, the measurement cursor and the header inspector need no purchase.
• Restore Purchases is on the Pro sheet, and one purchase covers both iPad and Mac.
The developer, GOLDEN ARC DIGITAL INC., 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
- GOLDEN ARC DIGITAL INC.
- Size
- 1.4 MB
- Category
- Utilities
- Compatibility
Requires iPadOS 17.0 or later.
- iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPad
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- EDF Viewer Pro $4.99
- Copyright
- © 2026 GOLDEN ARC DIGITAL INC.