GSpike — G-Force Meter
Track G's on iPhone & Watch
$1.99 · Designed for iPhone. Not verified for macOS.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Joanna Bednarczyk, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joanna Bednarczyk
- Size
- 47.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Studio Volt
