Terms & safety
Train with attention, not force.
Effective August 16, 2026
Listen to your body and your voice
Use comfortable ranges, intensities, and repetition counts. Stop immediately if you experience pain, dizziness, numbness, breathing difficulty, sudden hoarseness, or vocal strain. Seek qualified medical or voice-professional guidance when appropriate.
Glass Challenge safety
Glass Challenge is a simulated pitch-and-intensity exercise for practice and entertainment. Never attempt to shatter or damage a real glass with your voice. The app’s displayed sound level is an estimate and is not a calibrated safety measurement.
Your music and media
You are responsible for having the rights needed to import, use, record with, or export music and other media. Availability can vary because of Apple Music protections, file formats, device routes, and Bluetooth limitations.
Optional purchases
Purchases are handled through Apple and are subject to Apple’s payment, family-sharing, refund, and account terms. Feature availability may depend on a valid App Store entitlement.
Product availability
Features may change in future versions. Audio behavior can vary by iPhone or iPad model, iOS or iPadOS version, microphone, headphones, interface, room, and other conditions. Use the latest supported app version and keep backups of media that matters to you.
Questions
For support or questions about these terms, email Endless Vocals at radwalls@gmail.com.