Last updated: 2 August 2026
SetMaster masters DJ sets. To do that it has to receive your audio and your
email address. This page covers what happens to both, and how long we keep
them. It applies to setmaster.krateo.me only; the rest of
krateo.me has its own policy.
| Data | Why | Legal basis |
|---|---|---|
| The audio you upload | To analyse the set and produce your master. It is never used to train models and never shared. | Art. 6(1)(b) GDPR: performing the service you asked for |
| Your email address | How we deliver your finished master, and how we recognise you. SetMaster has no accounts and no passwords. | Art. 6(1)(b) GDPR |
| Set metadata (title, artist, year, genre, all optional) | Written into the tags of your master file. | Art. 6(1)(b) GDPR |
| Your IP address | Counted in memory to rate-limit abusive traffic. Never written to disk. | Art. 6(1)(f) GDPR: keeping the service available |
| Error reports | When something breaks, a technical report is recorded so it can be fixed. Personal data is scrubbed before it is stored. | Art. 6(1)(f) GDPR |
The app keeps two values in your browser's local storage: a reference to the set you are working on, so a reload does not lose it, and your sign-in session if you are a subscriber and have signed in. Neither is a cookie, and clearing your browser data removes both.
| What | Kept for |
|---|---|
| Uploaded audio and rendered masters | 24 hours |
| Download and resume links | 24 hours, or 30 days if you paid |
| Sign-in links | 30 minutes, single use |
| The record holding your email | Deleted with the link above, so 24 hours or 30 days |
| Your email on a payment record | 180 days, then removed while the order itself is kept |
| Subscription status and usage | 90 days, so a monthly allowance can be counted |
| Feedback you send us | 180 days |
All of this deletes itself automatically. Nothing on this list needs you to ask.
Each of these processes data on our behalf, for the purpose named and nothing else:
| Who | What for |
|---|---|
| Polar Software, Inc. | Payments. Polar is the Merchant of Record, so Polar is the seller and handles your payment details, invoicing and tax. We never see your card details. |
| Resend | Sending the emails that deliver your master and your sign-in links. |
| Netcup GmbH | The server in Germany where the service runs and your audio is processed. |
Under the GDPR you can ask for access to your data, correction, deletion, restriction of processing, portability, and you can object to processing based on legitimate interests. You can also complain to a supervisory authority.
In practice all of it deletes itself on the schedule above, whether you ask or not. If you want something gone sooner, email us and we will act on it.
Email mastering@krateo.me.