Mirror applications for HUD display with horizontal flip.
About this app
Middor is a free and open-source Android application for mirroring apps on your device.
With built-in support for horizontal flip and 180° rotation, Middor can be used to:
• Display apps on a HUD
• Project content onto a car windscreen (e.g. Google Maps navigation)
• View mirrored images and videos
Middor only supports devices running Android 14 QPR2 or higher, as it relies on the single app screen sharing feature. For more details, see Android 14 - App Screen Sharing: https://developer.android.com/about/versions/14/features/app-screen-sharing
For usage instructions, see https://github.com/nktnet1/middor/discussions/2
Permissions
• SYSTEM_ALERT_WINDOW: to draw a mirror overlay on top of other apps
• FOREGROUND_SERVICE: to run the mirror service continuously while the overlay is active
• FOREGROUND_SERVICE_MEDIA_PROJECTION: for capturing the screen content of the underlying app
• POST_NOTIFICATIONS: (optional) to display the mirror service notification with additional actions
Contact
Questions/Feature Requests
Create a Q&A for questions and Ideas for feature requests on GitHub discussions: https://github.com/nktnet1/middor/discussions
Bugs/Issues
Report bugs by creating a GitHub issue describing the problem and how it can be reproduced: https://github.com/nktnet1/middor/issues
Please also include your device model, app version and android version.
Other
For all other inquiries, please reach out to: support@middor.nktnet.org
Licensed under AGPL-3.0-or-later, by Khiet Tam Nguyen.
What's New in v0.1.7
Imported from the F-Droid repository index.
- ## Changes
- - feat: added warning for Android 14 devices about requiring minimum QPR2
- - deps: bump package versions (jetpack compose)
Version history
Feb 7, 2026 · 2.6 MB · Android API 34–36 · code 8
Imported from the F-Droid repository index.
- ## Changes
- - feat: added warning for Android 14 devices about requiring minimum QPR2
- - deps: bump package versions (jetpack compose)
SHA-256 c7ead03f26a76ef8a6ec25be7521b755c5918115012fd64b848d6c19eb7c82ce
Jan 28, 2026 · 2.6 MB · Android API 34–36 · code 7
Imported from the F-Droid repository index.
- ## Changes
- - fix: expanded dark theme & force dark mode compatibility
SHA-256 4f5f31b9cf4b33e21907ac430d85f76a30008b50505b8229450e66ef4ad99f79
Jan 23, 2026 · 2.6 MB · Android API 34–36 · code 6
Imported from the F-Droid repository index.
- ## Changes
- - feat: setting to remove system bars
SHA-256 25d0b4c567809bba12c6eec23a3fcc0b5faf05c191972a245263167e1a203e6e
Will it run on your device?
74%
- Targets newer Android builds, so legacy devices may be excluded.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.nktnet.middor is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 0.1.6 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Middor first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Middor, and a listing is removed when the evidence for it stops holding up.
Get Middor
Every source we list for org.nktnet.middor is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
c7ead03f26a76ef8a6ec25be7521b755c5918115012fd64b848d6c19eb7c82ce
Signing certificate
3c5f0a8efea2fe6f9562a81c207d9a261313ae6cb336e44da33e6d3aa6ee8c4a
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.