GSpike — G-Force Meter

Launch price — $1.99 for a limited time! The only G-force meter with Apple Watch + Live Activity + session recording. No ads. No subscriptions. Yours forever.

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