Privacy Policy
Viaduct (iPhone, iPad, Android, Meta Quest, Mac and Windows; Android package com.quada.viaduct)
This is the privacy policy for Viaduct (the "App") provided by Quad-A Digital ("we", "us"). The App is a file transfer app that sends photos, videos and files directly between your own devices. Please read it before using the App.
1. Information we don't collect
The App has no account sign-up and no advertising or analytics SDKs. We do not collect personal information such as your name, address, phone number, location or contacts. We never receive the contents of the files you send.
2. Communication between devices
Photos, videos and files are exchanged directly between the devices you choose. They never pass through our servers or any cloud.
- On the same network — sent directly within your home Wi-Fi or LAN
- Where there's no Wi-Fi (Pro, optional) — devices connect to nearby devices over Bluetooth or a direct Wi-Fi link and send directly
- All communication is encrypted (P-256 key exchange and AES-128-GCM)
- A device you haven't paired with before can connect only after you compare the confirmation code shown on both screens and allow it
- To find other devices on the same network, the App announces the device name, device type and port number on your local network (Bonjour). When sending without Wi-Fi, it advertises over Bluetooth nearby for the same purpose
3. Purchases (Pro)
- Pro (a one-time purchase) is bought and verified through the App Store or Google Play billing. Payment information is handled by each store; we never receive it
- The start date of the 7-day free trial is stored only on your device
4. Permissions the App uses
- Photos and videos — to list your recent photos and screenshots for sending, and to save received photos and videos to Photos or your gallery. Nothing is sent unless you choose to send it
- Local network, Wi-Fi state and multicast — to find and communicate with devices on the same network
- Bluetooth and nearby devices — to connect directly to nearby phones where there's no Wi-Fi
- Location (Android 12 and earlier only) — on Android 12 and earlier, Android requires this permission to connect devices directly over Wi-Fi. The App never collects, stores or sends your location
- Notifications and foreground service — to keep sending and receiving with the screen off and show progress in a notification
- Keeping the device awake — so transfers don't stop midway
- Save location (Mac and Windows) — to write received files to the folder you choose
5. Data stored on your device
The following data is stored only on each device and is never sent to our servers.
- Received files — in your device's save locations (Photos, gallery, Downloads, etc.)
- Partially received files — kept temporarily in a hidden folder inside the save location so transfers can resume (deleted automatically after one week)
- Paired devices — the names and encryption keys of devices you've allowed (to skip the prompt next time and to prevent impersonation)
- Settings — save locations, per-device folders, and the trial start date
6. Sharing with third parties
We do not sell or provide your information to third parties, except as required by law.
7. Advertising and analytics
The App does not include advertising SDKs or behavioral analytics SDKs.
8. Deleting your data
Uninstalling the App deletes the settings and paired-device information stored on the device. Files you received remain in your device's save locations (delete them as needed). You can revoke permissions at any time in your device's settings.
9. Children's privacy
The App is not directed at children under 13. We do not knowingly collect personal information from children under 13.
10. Changes to this policy
We may update this policy as needed. We will announce significant changes on this page or in the App. The updated policy takes effect when it is posted on this page.
11. Contact
For questions about this privacy policy, please contact us at: