Support and feedback

How can we help?

Grounds is made by Kaji Labs. Send support questions or feedback to hi@kajilabs.ca.

Getting started

Grounds requires an Apple Watch paired with an iPhone, running watchOS 10 or later and iOS 17 or later.

Open Grounds on iPhone first and choose your racquet hand, Watch wrist, and backhand style. Then open Grounds on your paired Apple Watch and complete permission setup.

Workout access is required to record and save your tennis workout to Apple Health. Heart-rate, active-energy, and court-location access are optional. Make your permission choices in Apple’s system dialogs.

Start and finish your tennis session on Apple Watch. You can pause and resume during breaks. Your completed session syncs to iPhone when the devices reconnect. You can record without a court location if you decline location access.

About stroke counts

Grounds provides estimated forehand and backhand counts for supported player profiles:

• Two-handed backhand: estimated counts are available with the Watch on either wrist.
• One-handed backhand: estimated counts require the Watch on your racquet wrist.

These profiles apply to both right-handed and left-handed players. Keep your tennis setup accurate so Grounds uses the appropriate model.

Counts can miss strokes or include false positives. When your Watch is on your non-racquet wrist, closely spaced same-side strokes may be intentionally suppressed to reduce double-counting. Rapid drills and mini-tennis are not guaranteed to count accurately.

Do not use counts as exact tracking, coaching, or medical measurements.

If your player profile is not supported, or counting cannot start, Grounds can still save your workout without stroke counts.

Permissions and troubleshooting

If recording cannot start, open Grounds on your Watch and review its setup and workout access. Manage permissions through your Apple device’s Settings and Health controls.

Missing heart-rate or calorie readings do not necessarily mean the session failed to record. Those metrics depend on the access and readings available from Apple Health.

For wrist-motion issues, open Settings → Troubleshooting in Grounds on your Watch and run the optional wrist-sensor test. The test does not save motion samples.

Court locations

With location access, Grounds captures one location near the beginning of a session for your private play map. It does not record a route.

The nearby-court lookup can be approximate. You can add, correct, or remove the location from the session’s workspace on iPhone. Location search and maps use Apple’s mapping services.

Data and sharing

Grounds keeps sessions on your Apple Watch and iPhone and syncs them between those devices. There is no Kaji Labs account, advertising, or analytics. Grounds only sends data to Kaji Labs when you send a bug report.

Preview your story and choose its content before opening it in Instagram or Messages, using More for the iPhone share sheet, or choosing Download to save it to Photos. Grounds does not automatically publish your story. If Instagram or Messages is unavailable, the system share sheet may open instead.

Grounds excludes its own session and Gallery storage from device and iCloud backups. Copies saved to Health, Photos, Files, or sharing destinations use those services’ storage and privacy settings.

Deleting your data

To remove a session, press and hold it in Your Sessions, then confirm deletion. This removes the session and its map from Grounds on iPhone and sends a deletion to your Apple Watch when it reconnects.

Gallery creations and Health workouts are separate:

• Delete saved creations in Gallery.
• Delete Health workouts in the Health app.
• Delete copies saved or shared outside Grounds through the destination where they are stored.

Deleting a session does not delete those separate copies.

Report a bug

The quickest way to report a problem is in Grounds on iPhone: open Settings → Report a Bug, describe what happened, and tap Send Report. The report includes your app, device, and setup details, and up to five recent sessions with diagnostics about how counting ran, so you don’t need to look these up yourself. You can leave out any session before sending. Court locations and heart-rate graphs are never included. Add your email address if you’d like a reply.

See the Privacy Policy for exactly what a report contains and how it is handled.

When you contact us

Please include:

• Your iPhone and Apple Watch models.
• Your iOS and watchOS versions.
• Your Grounds app version.
• A short description of what happened and what you expected.

For stroke-count questions, also include your racquet hand, Watch wrist, and backhand style.

Do not send Health or location information unless it is necessary for the support request. If you attach screenshots, check them for personal information first.

Contact: hi@kajilabs.ca.