No. You can record or upload a swing in Motion Lab without one and see the summary, the visual proof, the main issue and your One Fix. A free account saves the fix and unlocks your practice plan, retest and progress.
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Standard Motion Lab analysis runs on your device. Golf CSV and manual shot data also have one unsaved guest preview per recognized browser: when you request it, mapped shot values are processed by SwingVantage without saving a session or calling AI. That preview does not carry into an account. Saved on-device Motion Lab reports follow the existing account handoff; signing in to a different account clears the previous account’s browser data.
The account exists because a fix is only useful if it is still there when you practice and retest. It also lets your progress follow you to another phone or computer — see syncing across devices.