Legal
Privacy Policy
Last updated: March 2026
Overview
SparkStash is built to help musicians capture and organise their creative ideas. We take your privacy seriously. This policy explains what information we collect, how we use it, and what choices you have.
The short version: your creative content belongs to you. Guest users store everything locally on their device only. Signed-in users can optionally sync their content to secure cloud storage. We collect your email address if you join our waitlist or create an account, and we process subscription purchases through Apple and RevenueCat.
Information we collect
Waitlist email address
If you sign up for early access at sparkstash.app, we collect your email address. We use this solely to notify you when SparkStash launches and to send occasional product updates. We use Loops.so to manage email delivery. You can unsubscribe at any time using the link in any email we send.
Account information
If you create a SparkStash account, we collect your email address and a securely hashed password. This information is used to authenticate you, enable cloud sync across devices, and manage your subscription. We use Supabase to store account credentials and your subscription tier. You can delete your account at any time by emailing us.
App data
Guest users: All ideas, lyrics, recordings, projects and notes are stored exclusively on your device. This data is never transmitted to our servers and we cannot access or recover it.
Signed-in users: Your creative content is synced to secure cloud storage (Supabase) so you can access it across devices and benefit from cloud backup. This data is encrypted in transit and at rest. We do not use your creative content for any purpose other than providing the service to you.
Subscription and purchase data
If you subscribe to SparkStash Premium, your purchase is processed by Apple through the App Store. We use RevenueCat to manage subscription entitlements. RevenueCat receives a pseudonymous user identifier and subscription status — no payment card details. We store only your current subscription tier (free or premium) in your account profile.
Analytics
We use PostHog to collect analytics within the SparkStash app. This includes feature usage events such as creating a capture, starting a project, and viewing the upgrade page. We use this data solely to understand how the app is used and to improve the product experience. Analytics are linked to your account (user ID and email address) for signed-in users. Automatic capture, click tracking, and input tracking are all disabled — only specific named events are recorded. PostHog does not sell your data or use it for advertising purposes.
Information we do not collect
We do not collect:
- Your name, location, or any other personal details beyond your email
- Device identifiers or advertising IDs
- Payment card or banking details (handled entirely by Apple)
How we use your information
We use the information we collect to:
- Authenticate you and provide access to your account
- Sync your creative content across devices (signed-in users)
- Manage your subscription status and unlock Premium features
- Notify waitlist subscribers when SparkStash is available
- Send occasional product updates to waitlist and account holders
- Understand how the app is used so we can improve it (via PostHog analytics)
We will never sell, rent, or share your personal data with any third party for marketing purposes.
Data retention
We retain your waitlist email address until you unsubscribe or request deletion. Account data (email, subscription tier, synced content) is retained for as long as your account is active. You may request deletion of your account and all associated data at any time by emailing us at hello@sparkstash.app. We will action deletion requests within 30 days. Guest-mode app data is retained on your device for as long as the app is installed; uninstalling removes it permanently.
Your rights
Depending on where you live, you may have rights including the right to access, correct, or delete your personal data. To exercise any of these rights, email us at hello@sparkstash.app. We will respond within 30 days.
Third-party services
We use the following third-party services:
- Supabase — account authentication and cloud data storage. supabase.com/privacy
- RevenueCat — subscription management and entitlement verification. revenuecat.com/privacy
- Apple App Store — payment processing for Premium subscriptions. Apple's privacy policy applies to all payment transactions.
- Loops.so — email delivery for waitlist communications. loops.so/privacy
- PostHog — in-app analytics (feature usage events). No advertising use, no data selling. posthog.com/privacy
We do not use any advertising networks or cross-site tracking services.
Children's privacy
SparkStash is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided us with their email address, please contact us and we will delete it promptly.
Changes to this policy
We may update this policy from time to time. We will notify waitlist subscribers of any material changes by email. The date at the top of this page reflects when the policy was last updated.
Contact
Questions about this policy? Email us at hello@sparkstash.app. We aim to respond within 2 business days.