ForceData vs Watch G

ForceData is a very simple app that uses the sensors of the iPhone, iPad or Apple Watch to measure acceleration, velocity and force. Also, it exports filtered data to a CSV file. This CSV file is already prepared to plot force-time, velocity-time and acceleration-time curves easily. Very useful for simple sport biomechanics analyses in exercises like the countermovement jump or the squat!

G-Force Lab brings Watch G to iPhone. See live G-force on your wrist and on your phone, record sessions, graph them, and understand what the numbers mean. Watch G (Apple Watch) A dual-arc gauge built for the wrist: green for load (positive G), red for airtime (negative G). Live reading, peak, and a trailing arc so a hit doesn’t vanish before you look. • 50 samples per second from the watch accelerometer • Record on the watch for up to 5 minutes • Peak haptics, optional X/Y/Z axes • Recordings list with duration and peak • Tap a session for a graph • Auto-send finished recordings to iPhone when G-Force Lab is nearby G-Force Lab (iPhone and iPad) The companion app. Stream live from Watch G, or use this device’s own accelerometer. • Live 50 Hz gauge, 10-second chart, and a 3-axis vector • Record on iPhone for up to 10 minutes • Jump, fall, drop, and impact detection as they happen • Session library: watch, iPhone, and imported JSON • Open any session: graph, scrub, pinch-zoom, replay • Explore: G ladder, jump height from airtime, how the sensor works • In-app user manual Recording unlock The live gauge, motion detection, and your saved sessions stay free. Recording on Apple Watch and iPhone is free for 24 hours after you first open this version. After that, Unlock Recording is a one-time purchase (US $3.99, or your local equivalent). No subscription. Restore Purchase is in the unlock screen. Buy once on iPhone; it unlocks recording on the paired watch too. Technical • Rate: 50 Hz • Watch recording: up to 5 minutes • iPhone recording: up to 10 minutes • Storage: on device (watch and iPhone) • Format: JSON with timestamps • Display: live, about ±0.01 g Privacy G-Force Lab and Watch G keep recordings on your devices. No account. No analytics SDK. The apps talk to each other over WatchConnectivity. Purchases go through your Apple Account. Who it’s for Educational and hobby use, sports impacts, vehicle and equipment tests, adventure sports. Not a medical device. Not for emergency calls. Disclaimer Watch G and G-Force Lab are provided “as is” without warranties of any kind, express or implied. They are for informational and educational purposes only. They are not medical devices and do not call for help after a fall. The developer and publisher are not responsible for damages, losses, injuries, or consequences from use or misuse. You assume all risk. Do not use these measurements as the sole basis for critical decisions in racing, aviation, sports, or anything else. Use proper safety gear and qualified advice when it matters. By using the apps, you agree you are solely responsible for your use and any outcomes.