Privacy Policy

Last updated: January 19, 2026

Company: KST Development (doing business as SyncMuse)
Service: A collaboration platform for musicians to share tracks and create music together

The Short Version

We collect what we need to make SyncMuse work. We don't sell your data. We're not in the surveillance business—we're trying to help you stop naming files "final_v7_reallyfinal.wav."

What We Collect

Information You Give Us

Account details – Name, email address, password
Google login data – If you sign up via Google, we receive your name and email from them
Payment information – Processed by FastSpring. We don't store your card details; they do
Content you upload – Your tracks, stems, comments, and project data. That's the whole point

Information Collected Automatically

Usage data – What features you use, when you use them, how things break
Log data – IP address, browser type, device info, timestamps. Standard web stuff
Cookies – See our Cookie Policy for the full rundown

We do not collect precise device location. Your IP address tells us roughly where you are (country/region level), and that's it.

How We Use It

To run SyncMuse – Account creation, authentication, delivering the service you signed up for
To process payments – Subscriptions handled through FastSpring
To communicate with you – Password resets, service updates, responding to support requests
To improve the product – Analytics help us understand what's working and what's frustrating
To send marketing emails – Only with your consent, and you can opt out anytime

We do not use your data for targeted advertising.

FastSpring – Payment processing
PostHog – Product analytics
Google – Authentication (if you use Google login) and minimal ad conversion tracking

We share data with other users only when you explicitly do so—posting comments on shared projects, inviting collaborators, etc.

We have not sold or shared personal information for commercial purposes.

If KST Development is ever acquired or merged, your data would transfer to the new entity. We'd notify you before that happens.

Where Your Data Lives

Our servers are located in South Korea. If you're accessing SyncMuse from elsewhere, your data crosses borders. That's how the internet works.

How Long We Keep It

Account data – As long as you have an account
Content you upload – As long as you have an account, plus a reasonable period after deletion to handle backups and edge cases
Analytics data – Aggregated and anonymized over time

If you delete your account, we delete or anonymize your personal data. Some information may persist in backups for a limited period.

Security

We use reasonable technical and organizational measures to protect your data. But no system is perfectly secure—anyone who tells you otherwise is lying. We do our best.

Your Rights

Depending on where you live, you may have the right to:

Access your personal data
Correct inaccuracies
Delete your data
Export your data
Withdraw consent
Opt out of marketing emails

You can manage most of this directly in your account settings. For anything else, email us.

Children

SyncMuse is not for anyone under 18. We don't knowingly collect data from minors. If we discover we have, we'll delete it.

Changes to This Policy

If we make significant changes, we'll notify you via email or a notice in the app. Minor tweaks (typos, clarifications) may happen without fanfare.

Contact

Data Protection Officer: Kyle Tong
Email: info@syncmuse.co

What We Collect

Information You Give Us

Account details – Name, email address, password

Google login data – If you sign up via Google, we receive your name and email from them

Payment information – Processed by FastSpring. We don't store your card details; they do

Content you upload – Your tracks, stems, comments, and project data. That's the whole point

Information Collected Automatically

Usage data – What features you use, when you use them, how things break

Log data – IP address, browser type, device info, timestamps. Standard web stuff

Cookies – See our Cookie Policy for the full rundown

We do not collect precise device location. Your IP address tells us roughly where you are (country/region level), and that's it.

How We Use It

To run SyncMuse – Account creation, authentication, delivering the service you signed up for

To process payments – Subscriptions handled through FastSpring

To communicate with you – Password resets, service updates, responding to support requests

To improve the product – Analytics help us understand what's working and what's frustrating

To send marketing emails – Only with your consent, and you can opt out anytime

We do not use your data for targeted advertising.

Who We Share It With

FastSpring – Payment processing

PostHog – Product analytics

Google – Authentication (if you use Google login) and minimal ad conversion tracking

We share data with other users only when you explicitly do so—posting comments on shared projects, inviting collaborators, etc.

We have not sold or shared personal information for commercial purposes.

If KST Development is ever acquired or merged, your data would transfer to the new entity. We'd notify you before that happens.

How Long We Keep It

Account data – As long as you have an account

Content you upload – As long as you have an account, plus a reasonable period after deletion to handle backups and edge cases

Analytics data – Aggregated and anonymized over time

If you delete your account, we delete or anonymize your personal data. Some information may persist in backups for a limited period.