What is a license key?
A license key is a code you receive when you buy an app. You paste it into the app, and the app treats your copy as paid. It replaces an account and a password for software that does not need one.
Why it matters
A key lets an app stay account free. NotchStar has no sign up. After the free trial, you buy once, get a key, and paste it in Settings, License. One key works on up to three of your own Macs, and you can free a slot from the same settings screen.
How NotchStar checks it
Activating a key sends the key and your Mac’s name to Dodo Payments, which counts your devices. About once a week the app silently asks whether the license is still valid. If you are offline, nothing happens and the app keeps working, because offline never revokes a license. The key is kept in a file in the app’s support folder on your Mac. The privacy page lists what is sent.
If a trial ends without a key
The app asks for a key to keep the notch open. It never touches your data.
Related
Dodo Payments is the merchant of record that issues the key. Compare payment models in one time purchase. See what the app can do in the Clipboard tool and read is NotchStar safe.