Cynosure Support
Need help with Cynosure? Here's how to reach us.
In-App Support
You can also reach us through the Contact form in the Cynosure app under Settings.
Account & Recovery
Cynosure uses end-to-end encryption. Your recovery phrase is the only way to access your encrypted data — if you lose it, no one (including A3RN) can recover your data.
Signing In
You sign in to Cynosure with your A3RN account. For help with signing in, passkeys, or your A3RN account itself, see A3RN Support.
Delete Your Cynosure Data
To delete everything Cynosure holds for you but keep your A3RN account, sign in to the Cynosure iOS, Android, or web app, open Settings, and choose “Delete My Cynosure Data.” This permanently removes your Cynosure data from our servers.
Delete Your A3RN Account
To delete your A3RN account entirely, go to auth.a3rn.com/account, sign in, and confirm. This deletes your Cynosure data and your data in every other A3RN product, and you will no longer be able to sign in.