Endpaper Labs LLC
Support
Last updated 29 July 2026
Write to us
hello@endpaperlabs.com reaches the studio and is read by a person. There is no ticket system, no bot and no queue position. It is a small studio, so it is simply us.
If your question is about one product in particular, its own support page is usually faster because it has the right instructions for that product.
What to include
You do not have to, but these three things turn most messages into a one-reply fix rather than three:
- which product, and whether you were on the web, an iPhone or iPad, or Android
- the email address on your account, if you have one
- what you expected to happen, and what happened instead
Billing and refunds
The product and where you bought it decide who can help:
- Bought inside an app on iPhone, iPad or Android, and Apple or Google is the merchant. Refunds go through the App Store or Google Play; we cannot issue those refunds ourselves, though we can help you find the right screen.
- Bought on the web and we are the merchant, through Stripe. Write to us and we can help with a refund. Charges appear on a statement as ENDPAPER with the product name.
Account and cancellation options vary by product. Check that product's settings or support page for the right steps.
Centerline help
Centerline has no account and no subscription. Alternate tunings and A4 calibration use a one-time unlock. The App Store or Google Play handles the purchase. If a past purchase is not available, use Restore purchase in the app, then check that you are signed in to the same store account used to buy it. For tuning or microphone help, include your device model, system version, app version, and the message you saw.
Security
If you think you have found a vulnerability, write to hello@endpaperlabs.com with enough detail to reproduce it, and please give us a chance to fix it before publishing. We have no bounty programme to offer, but we will credit you if you would like to be credited.
Press and everything else
Same address. Brand assets, product screenshots and the studio bookplate are available on request.