Legal
Cookie policy
Which cookies Opusis sets, what each one is for, and how to change your choice.
You can review or withdraw your consent at any time. Withdrawing takes effect immediately and does not limit any feature.
Necessary cookies
Required to sign you in, keep the service secure, and remember your language. These are set without consent because the service cannot be delivered without them.
| Name | Provider | Purpose | Retention |
|---|---|---|---|
| next-auth.session-token | Opusis | Keeps you signed in | 30 days |
| next-auth.csrf-token | Opusis | Protects sign-in forms against cross-site request forgery | Session |
| akbo-locale | Opusis | Remembers the display language you chose | 1 year |
| opusis-consent | Opusis | Stores your cookie choice on this page | 6 months |
Analytics cookies
Set only if you allow the analytics category. They help us see which features are used so we can prioritise work.
| Name | Provider | Purpose | Retention |
|---|---|---|---|
| _ga, _ga_* | Distinguishes visitors to measure feature usage | Up to 2 years |
Functional
If you allow the functional category and grant browser notification permission, we register a push token so we can deliver rehearsal invitations and announcements. This uses browser storage rather than a cookie.
Advertising
We do not currently use any advertising or retargeting tools, and no advertising cookie is set. The category exists so that your choice is already recorded if we introduce one; we will list the specific tools here before any are used.
Other storage and measurement
We store some preferences (score view mode, playback cursor visibility, recent practice runs) in your browser rather than in cookies; these never leave your device except where a feature sends them. We also record how the official score catalogue is used on our own servers, under our legitimate interest in improving the service. Search terms are masked and their original text is deleted after 90 days. Page views are additionally measured by Vercel Analytics, which does not use cookies or identify individuals.
Questions about cookies or your data: contact@opusis.io