Real-time average speed inside Bulgaria's average-speed camera zones.
About this app
SrednaBG shows your real-time running average speed inside Bulgaria's average-speed camera zones — and tells you the maximum speed you can sustain for the rest of the zone without going over the limit.
Free. Open source. Bulgaria only.
WHAT IT DOES
• Running average, live — The moment you enter a zone, your running average becomes the hero number. No lag, no jitter. Updates every second.
• Max now — Shows the top speed you can drive for the rest of the zone without breaking the limit. Waze tells you the zone exists; SrednaBG tells you what to do about it.
• Green / amber / red at a glance — The screen color tracks your state. Green: within limit. Amber: careful, slow down. Red: already over.
• Voice alerts in Bulgarian and English — Keep your eyes on the road. SrednaBG speaks zone entries, exits, and slowdown warnings in the language you choose.
• Works fully offline — The Bulgaria map and zone list are bundled inside the app. No internet needed in the car. Updates arrive quietly when you're on Wi-Fi.
• Alongside Waze, or instead of it — Run SrednaBG as a full navigator, or let it sit quietly behind Waze / Google Maps — you'll hear its voice when it matters.
PERMISSIONS, EXPLAINED
• Background location — Average-speed zones can be many kilometres long, and a drive often outlasts the screen timeout or runs behind another navigation app. SrednaBG needs location while in the background so your average keeps updating with the screen off or another app in front. It is used only to compute your speed inside zones — never shared, and it never leaves your phone.
• Ignore battery optimizations (optional) — You can grant an exemption so the system doesn't suspend tracking mid-drive. It is optional and requested only from a card you tap; tracking still starts without it, just less reliably on devices with aggressive power management.
PRIVACY
• No cookies, no trackers anywhere. • No account, no email, no signup. Install and drive. • No ads. No in-app purchases. Free forever. • No third-party SDKs. No Google Analytics. No Firebase. • Your location never leaves your phone.
Open source — MIT License. Source code: https://github.com/demosten-com/SrednaBG
Licensed under MIT, by Stanimir Karoserov.
What's New in v1.1.0
Imported from the F-Droid repository index.
- v1.1.0
- • New: floating overlay over Waze & Google Maps — an opt-in badge shows your live status on top of other navigation apps (off by default; enable in Settings).
- • New: per-vehicle speed limits — choose car, truck, bus, or motorcycle and zone limits adjust to match.
- • Clearer voice alerts: speeds are spoken more naturally in Bulgarian and English.
- • More accurate zone tracking, with fewer false entering/exiting flips at zone edges.
- • More reliable GPS for trustworthy speed readings.
Version history
Jun 30, 2026 · 91.5 MB · Android API 26–35 · code 10100
Imported from the F-Droid repository index.
- v1.1.0
- • New: floating overlay over Waze & Google Maps — an opt-in badge shows your live status on top of other navigation apps (off by default; enable in Settings).
- • New: per-vehicle speed limits — choose car, truck, bus, or motorcycle and zone limits adjust to match.
- • Clearer voice alerts: speeds are spoken more naturally in Bulgarian and English.
- • More accurate zone tracking, with fewer false entering/exiting flips at zone edges.
- • More reliable GPS for trustworthy speed readings.
SHA-256 d6758d78506aeef788c717bc4faa02af97ce5657105a458f14acd9ad8fab2918
Jun 3, 2026 · 91.5 MB · Android API 26–35 · code 10004
Imported from the F-Droid repository index.
- v1.0.4 — Initial public F-Droid release.
- • Real-time running average speed inside Bulgaria's average-speed camera zones.
- • "Max now" indicator — the top speed you can drive for the rest of the zone without going over.
- • Color-coded status (green / amber / red).
- • Voice alerts in Bulgarian and English.
- • Fully offline: Bulgaria map and zone list bundled in the app.
SHA-256 b52d9050f535b755b033c1dd3aa1fb6fa665f70e12170f9dbfcc234c42601c20
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- 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 com.demosten.srednabg 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, 1.0.4 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SrednaBG 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 SrednaBG, and a listing is removed when the evidence for it stops holding up.
Get SrednaBG
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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
d6758d78506aeef788c717bc4faa02af97ce5657105a458f14acd9ad8fab2918
Signing certificate
e525f7db0ff4cb1ceb27f0f291784e25bd08e7b13d25cf35e9fbf539282dc1c3
Permissions Required
What each permission lets SrednaBG do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
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