Legal

Terms of Service

Last updated: June 12, 2026

1. Welcome

Thanks for using Stempo ("the Service," "we," "our," "us"). The Service is operated by Guilherme Bilton, an individual entrepreneur based in Brazil ("the Company").

By creating an account or using the Service, you ("you," "the User") agree to these Terms of Service ("Terms"). If you don't agree, don't use the Service.

We may update these Terms occasionally. We'll email registered users about material changes at least 14 days before they take effect.

2. The Service

Stempo is a web application that lets users:

Upload audio files they own or have rights to
Process those files (pitch shift, time stretch, source separation, loudness normalization, etc.)
Organize processed files into a personal library
Play, share, and download processed files

The Service is delivered as software-as-a-service via web browsers and supported devices.

3. Eligibility

You must be at least 13 years old (or the minimum digital consent age in your country) to use the Service. If you're under 18, you confirm a parent or legal guardian has reviewed these Terms with you.

You may not use the Service if you're prohibited from doing so under any applicable law in your jurisdiction.

4. Your account

To access most features, you need an account. You agree to:

Provide accurate, current information when signing up
Keep your password secure
Notify us immediately if your account is compromised
Be responsible for all activity that happens under your account

We may suspend or terminate accounts that violate these Terms, our Acceptable Use Policy, or applicable law.

5. Content you upload

5.1 You own your audio

You retain all rights to the audio you upload. We don't claim ownership of your files.

5.2 You grant us a limited license to operate the Service

By uploading content, you grant us a non-exclusive, royalty-free, worldwide license to host, process, transmit, and display that content only for the purpose of providing the Service to you. We don't use your audio to train models, sell to third parties, or display publicly.

5.3 You're responsible for the content you upload

You confirm that:

You own the audio, OR
You have written permission from the rights holder to process it, OR
The audio is in the public domain or licensed in a way that permits this use

You may not upload content that:

Infringes copyright, trademark, or any third-party intellectual property
Contains personal data of others without their consent
Is illegal in your jurisdiction or ours
Violates our Acceptable Use Policy

We may remove content and suspend accounts that violate these rules. See our DMCA policy in section 11.

6. Subscriptions and billing

6.1 Free and paid tiers

The Service has a free tier (limited features and processing quotas) and one or more paid tiers ("Pro," "Team," etc.).

6.2 Billing

Paid plans bill in advance, monthly or annually depending on the option you choose. Billing is processed by Paddle (Paddle.com Market Limited, our merchant of record).

6.3 Auto-renewal

Subscriptions auto-renew at the end of each billing period unless you cancel before renewal. Cancellation takes effect at the end of the current period; you keep access until then.

6.4 Refunds

We offer refunds within 14 days of an initial purchase, no questions asked. After 14 days, refunds are at our discretion. Required statutory rights (consumer protection laws in your jurisdiction) are unaffected.

6.5 Price changes

We may change prices with at least 30 days' notice. Price changes don't affect the term you've already paid for.

6.6 Taxes

Prices are exclusive of taxes unless stated. Paddle, as merchant of record, handles VAT/GST/sales tax in applicable jurisdictions.

7. Free tools

We provide certain audio tools (vocal remover, key changer, song slowdown) free, with usage limits, without requiring an account. Use is subject to the same content and acceptable-use rules as the main Service.

8. Intellectual property

8.1 Our IP

The Service, our brand, our software, and any content we publish (other than user content) is owned by the Company and protected by copyright and trademark law. You may not copy, modify, or redistribute the Service without permission.

8.2 Your IP

See section 5 — you retain rights to your audio.

9. Privacy

How we handle personal data is described in our Privacy Policy. By using the Service you agree to that policy.

10. Acceptable Use

Your use of the Service must comply with our Acceptable Use Policy, which prohibits (among other things):

Uploading copyrighted material you don't have rights to
Using the Service for illegal purposes
Attempting to compromise the Service's security
Reverse-engineering, scraping, or abusing the API
Reselling the Service without permission

11. Copyright complaints (DMCA)

We respond to valid copyright complaints under the U.S. Digital Millennium Copyright Act (DMCA) and equivalent local laws.

To submit a complaint, email guilhermebilton@gmail.com with the subject line “Copyright complaint” and:

Identification of the copyrighted work
The URL of the infringing material
Your contact information
A statement of good-faith belief that the use is unauthorized
A statement, under penalty of perjury, that the information is accurate and you are the rights holder or authorized to act on their behalf
Your physical or electronic signature

We may remove allegedly infringing material and notify the user who uploaded it. Repeat infringers will have their accounts terminated.

12. Termination

You can cancel your account at any time from settings. We may suspend or terminate your account if you:

Materially violate these Terms or our Acceptable Use Policy
Use the Service in a way that could expose us or other users to legal liability
Attempt fraudulent activity (chargebacks, account-sharing for resale, etc.)

On termination:

Your access ends
We delete your data within 30 days unless legally required to retain it
Outstanding fees remain owed
Sections that should survive termination (IP, indemnity, dispute resolution) survive

13. Disclaimers

The Service is provided "as is" and "as available." We don't guarantee:

It will always be available, error-free, or secure
Processed audio will be of any specific quality
It will meet your specific needs

Audio processing is destructive in nature — pitch shifting, time stretching, and source separation can introduce artifacts. We don't guarantee any particular audio fidelity.

To the fullest extent permitted by law, we disclaim all warranties, express or implied, including merchantability, fitness for a particular purpose, and non-infringement.

14. Limitation of liability

To the fullest extent permitted by law:

Our total liability for any claim is limited to the amount you paid us in the 12 months before the claim
We are not liable for indirect, consequential, incidental, or special damages (including lost profits, lost data, or business interruption)

Some jurisdictions don't allow these limits. In those jurisdictions, our liability is limited to the smallest extent permitted.

15. Indemnification

You agree to indemnify and hold us harmless from claims, damages, or expenses (including reasonable legal fees) arising from:

Your use of the Service
Your content
Your violation of these Terms or any third-party rights

16. Governing law and disputes

These Terms are governed by the laws of Brazil.

Disputes will be resolved in the Brazilian courts, unless consumer-protection law in your jurisdiction gives you the right to file in your home jurisdiction.

17. Miscellaneous

Entire agreement. These Terms, plus the Privacy Policy and AUP, are the entire agreement between us.
Severability. If any clause is found invalid, the rest stays in effect.
No waiver. Our failure to enforce any right doesn't waive it.
Assignment. You can't assign these Terms; we can.

18. Contact

Questions? Email guilhermebilton@gmail.com — you'll reach the founder directly.