Fit Check is designed to help you get the best possible signal by confirming that Smartbuds’ sensors are making solid contact with your skin. It’s especially helpful when you’re first getting started and may not be sure if you're using the right sizes or positioning the bud correctly. But once you’ve found your groove, Fit Check doesn’t need to be part of every session.

If Smartbuds are new to you, Fit Check helps you learn the right combination of wing size, tip size, and positioning. A good fit improves comfort and maximizes signal quality, so using Fit Check during your first few sessions is key.

Over time, you need to replace wings and tips to keep your Smartbuds sensing effectively. If it’s been several weeks since your last replacement—or you’re not sure whether the current set is still delivering a good signal—Fit Check can help you confirm.
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If your sleep data looks off or you see an alert that Smartbuds lost contact, it may be a sign that your wings or tips need replacing, or that your Smartbuds could use a positioning check.

Whenever you switch to a different wing or tip size, Fit Check helps confirm that the new parts are making solid contact and giving you a reliable signal before you begin your session.

Once you’ve dialed in your setup, Fit Check no longer needs to be a daily ritual. You can confidently skip it when:

If you consistently get a good signal and the buds feel natural to put on, daily Fit Checks aren't necessary.
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If you’re staying on top of part replacement and your sleep data appears complete, you don’t need ongoing confirmation.

Skipping Fit Check can speed up your nightly routine. If you’re in a familiar setup and everything feels right, go ahead and move forward.