Blunami vs GSpike

The Blunami train control app by BlueRail Trains let's you control any locomotive equipped with a SoundTraxx Blunami DCC decoder.

FEEL THE FORCE. GSpike turns your iPhone and Apple Watch into a precision G-force meter. Measure acceleration forces in real time, record sessions, and track your peak G's — on rollercoasters, go-karts, ski slopes, and beyond. ▸ REAL-TIME G-FORCE GAUGE A beautiful, color-coded gauge shows your current G-force with instant response. Watch the ring change from cyan to green to orange to red as forces increase. ▸ APPLE WATCH COMPANION Strap on your Watch and measure G-forces from your wrist — perfect for rollercoasters, go-karts, or track days when your phone stays in your pocket. Independent accelerometer, full session recording, automatic sync. ▸ LIVE ACTIVITY See your G-force reading right on your Lock Screen while recording. No need to unlock your phone. ▸ SESSION RECORDING Hit record and capture every moment. Each session saves your peak G, average G, duration, and a sparkline chart. Compare runs, track progress, build your history. ▸ DUAL DEVICE Use iPhone and Apple Watch at the same time? GSpike records two separate sessions — one per device — so you can compare phone vs. wrist measurements side by side. ▸ AUTOMATIC SYNC Sessions sync instantly between iPhone and Apple Watch. Record on your Watch, see it on your phone. Delete on one device, gone from both. — GREAT FOR — - Rollercoasters & thrill rides — which ride hits the hardest? - Go-karts — measure cornering G's from your wrist - Track days & autocross — record cornering, braking, acceleration - Mountain biking — drops, jumps, berms - Skiing — carving G-forces through turns - Aviation training — monitor G-loading during maneuvers - Physics class — Newton's laws in your hand GSpike is a passive measurement tool for informational and recreational use. It does not encourage reckless or dangerous behavior. Always follow all applicable laws and safety regulations. — WHY GSPIKE — - No ads. Ever. - No subscriptions. Buy once, yours forever. - No accounts. No logins. No cloud. - All data stays on YOUR device. - No tracking. Privacy-first design. Built in Switzerland by Studio Volt. Questions? contact@studiovolt.dev