Ghosting Coach for Squash, Badminton and Racketlon
About this app
Ghosting is an established training exercise in racket sports to practice court movement without a ball. Moving to the various corners of the court improves both footwork and general stamina. In the best of worlds, your coach or sparring partner will always be ready to point you to random corners at a pace that pushes you to your limits.
Unfortunately, few people have access to a coach at all times, thus have to run the exercise on their own. That means the randomness in the order of corners is missing.
Getting Started
1. Configure your ghosting session. 2. Put your mobile device in front of you on the court. 3. Press "GO!" to start your ghosting session.
Licensed under MIT, by Markus Borg.
What's New in v1.8.6
Imported from the F-Droid repository index.
Version history
Jun 24, 2026 · 3.9 MB · Android API 14–35 · code 22
Imported from the F-Droid repository index.
SHA-256 1dec553f11f077f0dd4ac8fc7cf97aa117b3c799fe35838c471a77f527d09cb8
Sep 1, 2023 · 3.9 MB · Android API 14–33 · code 20
Imported from the F-Droid repository index.
SHA-256 17004efb88a35ec9ebc2b503f6e94a0597a566bff9516cb91919d8820ff6508f
Jun 16, 2021 · 4 MB · Android API 14–28 · code 19
Imported from the F-Droid repository index.
SHA-256 3e4e0ee2383a29772b728d14473b09f31e480ce7a83debcec488b63253fa2569
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- 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 com.markusborg.test 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, 1.8.4 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall RacketGhost 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 RacketGhost, and a listing is removed when the evidence for it stops holding up.
Get RacketGhost
Every source we list for com.markusborg.test 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
1dec553f11f077f0dd4ac8fc7cf97aa117b3c799fe35838c471a77f527d09cb8
Signing certificate
32114495606dc79e053f772b91a9f141c8b9ae418c5971cbc4e1cf1e1ae3fce2
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.
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