{"package_name":"com.flyboybyte.dragtree","name":"DragTree","summary":"NHRA Pro Tree reaction timer — accelerometer launch detection, no internet","category":"Sport Game","icon_url":"/api/icon/com.flyboybyte.dragtree","latest_version_code":162,"latest_version_name":"1.7.3","apk_url":"/api/apk/com.flyboybyte.dragtree","apk_size":33368927,"apk_sha256":"70fd5d69498d2713995f0034d8691c3820850534ea55e34bf2aacd85862e8c62","source_kind":"fdroid-repo","repo_slug":"fdroid-main","last_updated":1790823624,"release_timestamp":1790715170,"description":"DragTree simulates a real NHRA Christmas Tree (drag strip starting lights) and uses your phone's accelerometer to measure reaction time to the millisecond — no tapping required.\n\nMount your phone on the dash, stage up, watch the tree, and floor it. The app detects launch G-force automatically and records your RT. Fully offline — no internet, no account, no ads.\n\nTREE MODES\n• Pro Tree (.400s) — all three ambers fire simultaneously, green follows 0.400s later\n• Sportsman Tree (.500s) — ambers count down one at a time, green follows 0.500s after the last amber\n\nREACTION GRADING\n• Perfect: 0–0.049s\n• Pro: 0.050–0.099s\n• Great: 0.100–0.199s\n• Good: 0.200–0.349s\n• Late: over 0.349s\n• Red Light: launched before green\n\nFEATURES\n• Accelerometer launch detection — rolling baseline, no calibration step\n• Three sensitivity presets: Gentle (0.15g), Normal (0.25g), Hard (0.46g) plus custom dial\n• Session history — last 30 runs, personal best highlighted\n• Reaction time trend chart — bar chart of recent runs\n• Series mode — run 3, 5, or 10 back-to-back stages with avg RT, best/worst, and consistency score\n• Optional audio cues — amber click, green chirp, result ping, red-light buzz\n• Diagnostics screen — live G-force, sensor telemetry, last-launch breakdown\n• Browser / simulator mode — on-screen FLOOR IT button for desktop practice\n\nPERMISSIONS\n• HIGH_SAMPLING_RATE_SENSORS — required for 125 Hz accelerometer sampling. No other sensor or location permissions used.\n\nNo internet connection required after install.\n","categories":["Sport Game"]}