圖標

Bike Radar

Overlay and audio alerts for BLE bike radars. Offline, no account, no cloud.
新版本 1.2.0
Home Assistant MQTT topics move from varia/ to bikeradar/, so anything you trigger on a raw topic needs repointing by hand. Your entity ids keep the naming they have, but every entity is registered afresh and some come back with a _2 on the end; anything pointing at an affected id stops working until you delete the stale entity and rename the _2 back. Check your battery sensors, the close-pass event, and, if you have the camera, the front light mode. The rebuilt entities start with no history. I
Bike Radar shows and sounds what your rear bike radar sees, on top of whatever app you are already running.

A thin strip down the edge of the screen shows each approaching vehicle's distance, closing speed and lateral position over your map or navigation app. Tiered beeps rise as the closest vehicle gets nearer, and a distinct urgent tone fires when an impact looks imminent - including while you are rolling slowly toward a junction with a fast vehicle behind. A clear chime sounds when the radar no longer sees vehicles behind.

Everything runs on your phone: no account, no cloud, no analytics. The optional Home Assistant integration publishes ride stats to your own server and nowhere else.

Features:

- Live overlay with per-vehicle distance, closing speed and lateral position
- Tiered proximity beeps, urgent imminent-impact tone, all-clear chime
- Post-ride summary notification: overtakes, close passes, distance, tightest pass
- Front camera/light auto mode by local sunset (one coarse location read per ride)
- Bosch Smart System eBike telemetry, strictly read-only
- Walk-away and forgot-to-lock reminders
- Optional Home Assistant publishing: batteries, close passes, ride summaries
- Optional on-device capture log for diagnostics, off by default and never uploaded
- English and Spanish

Requires a rear radar that speaks the V2 BLE protocol (pair it once in system Settings) and Android 12 or newer. The radar, camera and eBike integrations degrade gracefully: each works without the others.

Bike Radar is a riding aid, not a safety guarantee. It supplements your own attention and mirrors - it never replaces them.

This is an independent open-source project (GPL-3.0-or-later), not affiliated with or endorsed by any radar or eBike manufacturer.

版本

雖然在下方可選擇下載 APK 檔案,但要留意這樣的安裝方式將不會收到更新通知,是一種較不安全的下載方法。建議您先安裝 F-Droid 用戶端使用。

下載 F-Droid
  • 版本 1.2.0 (23) 建議 於 2026 年 8 月 21 日新增

    arm64-v8a armeabi-v7a x86 x86_64

    此版本需要 Android 12 或更高的版本。

    此套件包由原開發者建置和簽署,並保證與此原始碼 Tarball 保持一致。

    權限
    • 僅可在前景中取得概略位置
      只有在你使用時,這個應用程式才能透過定位服務取得你的概略位置。你必須在裝置上開啟定位服務,這個應用程式才能取得位置資訊。
    • 與已配對的藍牙裝置連線
      允許應用程式與已配對的藍牙裝置連線
    • 探索鄰近藍牙裝置並進行配對
      允許應用程式探索鄰近藍牙裝置並進行配對
    • 執行前景服務
      允許應用程式使用前景服務。
    • 搭配「connectedDevice」類型執行前景服務
      允許應用程式搭配「connectedDevice」類型使用前景服務
    • 搭配「mediaProjection」類型執行前景服務
      允許應用程式搭配「mediaProjection」類型使用前景服務
    • android.permission.FOREGROUND_SERVICE_SHORT_SERVICE
    • 擁有完整的網路存取權
      允許應用程式建立網路通訊端及使用自訂網路通訊協定。瀏覽器和其他應用程式會提供將資料傳輸到網際網路的方法,因此不需要這項權限也能將資料傳輸到網際網路。
    • 顯示通知
      允許應用程式顯示通知
    • 啟動時執行
      允許應用程式在系統完成開機程序後立刻自行啟動。這會增加手機的開機時間,而且會因為系統一直執行該應用程式導致手機的整體運作速度變慢。
    • 此應用程式可顯示在其他應用程式上方
      這個應用程式可顯示在其他應用程式上方或畫面中的其他位置。你可能會無法照常使用應用程式,且其他應用程式的顯示方式可能會受到影響。
    • 控制震動
      允許應用程式控制震動。
    • 防止手機休眠
      允許應用程式防止手機進入休眠狀態。
    • es.jjrh.bikeradar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    下載 APK 7.6 MiB PGP 簽章 | 建置紀錄