Terms of Service
Last Updated: November 10, 2026
Welcome to Simple Tuner ("the App"). Please read these Terms of Service ("Terms", "Agreement") carefully before downloading, installing, or using Simple Tuner, developed and operated by CORR ACOUSTIC TECHNOLOGY CO., LTD. ("us", "we", or "our").
By accessing, downloading, installing, or using Simple Tuner, you agree to be bound by these Terms. If you do not agree to these Terms, please do not use or access the App.
1. Acceptance of Terms
By using Simple Tuner, you represent that you are at least 13 years of age (or the minimum legal age required in your jurisdiction) and possess the legal capacity to enter into a binding agreement. If you are using the App on behalf of an entity, organization, or minor, you represent that you have the authority to bind them to these Terms.
2. Description of the Service
Simple Tuner is a mobile application designed to assist users in tuning musical instruments (including Guitar, Ukulele, Violin, Bass, 6-String Bass, Chromatic tuning, and Custom Frequency Ranges). Key features of the App include:
Real-time pitch and frequency detection utilizing your device’s microphone.
Reference tone audio generation for manual ear tuning.
Customizable parameters (e.g., A4 reference pitch, signal noise floor threshold, stability filters, and custom frequency ranges).
Support for built-in and external Bluetooth microphones.
The App is currently offered free of charge and supported by third-party advertisements.
3. License and Permitted Use
Subject to your compliance with these Terms, we grant you a limited, personal, non-exclusive, non-transferable, non-sublicensable, and revocable license to download, install, and use Simple Tuner on an Android device that you own or control, strictly for personal, non-commercial purposes.
You agree not to:
Reverse engineer, decompile, disassemble, or attempt to derive the source code or underlying algorithms of the App.
Modify, adapt, translate, create derivative works, or crack any portion of the App.
Rent, lease, lend, sell, redistribute, or sublicense the App to any third party.
Use the App for any illegal or unauthorized purpose in violation of any applicable local, national, or international laws.
Interfere with or attempt to bypass any security features, technical measures, or third-party ad delivery systems within the App.
4. Device Permissions & Audio Privacy
To deliver its core tuning functionality, Simple Tuner requests access to certain hardware permissions on your device:
Microphone Access (RECORD_AUDIO): Required for analyzing incoming instrument sound frequencies. Audio streams are processed locally in real-time on your device. Audio recordings are never recorded, stored, saved to file, or transmitted to any external server or third party.
Bluetooth Permissions (BLUETOOTH_CONNECT): Required to enable input selection for external Bluetooth microphone devices.
For detailed information regarding how non-audio data (such as advertising IDs and technical diagnostics) is collected and handled by third-party ad networks, please consult our Privacy Policy.
5. Audio Playback & Hearing Safety Disclaimer
Simple Tuner includes a built-in sound generator that produces reference pitch audio tones.
Hearing Safety Warning: Listening to audio tones at high volume levels—especially through headphones or earbuds—may cause permanent hearing damage or discomfort. You are solely responsible for managing and setting a safe output volume on your device prior to playing reference sound tones.
Audio Output Limitation: We accept no responsibility or liability for hearing impairment, acoustic trauma, or hardware damage (such as speaker distortion) resulting from your use of the reference tone feature or high volume settings.
6. Third-Party Advertisements & Services
Simple Tuner is an ad-supported free app. The App integrates third-party services, including Google AdMob and the Google User Messaging Platform (UMP), to display banner and native advertisements and to manage user consent preferences.
Advertisements displayed in the App are provided by independent third-party advertising networks. We do not control, endorse, or guarantee the content, quality, accuracy, or safety of any third-party ads or advertised products/services.
Any interaction or commercial transactions between you and third-party advertisers are strictly between you and the respective advertiser, governed by their independent terms and privacy policies.
7. Intellectual Property Rights
All rights, title, and interest in and to Simple Tuner—including but not limited to software code, user interface designs, audio processing algorithms, visual layouts, graphics, text, icons, and trademarks—are owned by or licensed to CORR ACOUSTIC TECHNOLOGY CO., LTD.. All rights not expressly granted to you under these Terms are reserved by us.
8. Disclaimer of Warranties
SIMPLE TUNER IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. TO THE FULLEST EXTENT PERMISSIBLE PURSUANT TO APPLICABLE LAW, WE EXPRESSLY DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT.
ANY WARRANTY THAT THE APP WILL MEET YOUR REQUIREMENTS, OPERATE UNINTERRUPTED, BE ERROR-FREE, SECURE, OR FREE FROM BUGS, VIRUSES, OR OTHER HARMFUL COMPONENTS.
ANY GUARANTEE REGARDING THE ABSOLUTE ACCURACY, RELIABILITY, OR PRECISION OF PITCH DETECTION OR REFERENCE SOUNDS FOR PROFESSIONAL PERFORMANCES, STUDIO RECORDINGS, OR SPECIFIC INSTRUMENTS.
YOUR USE OF THE APP IS AT YOUR OWN DISCRETION AND RISK. PITCH DETECTION ACCURACY MAY BE INFLUENCED BY EXTERNAL FACTORS SUCH AS AMBIENT NOISE, MICROPHONE HARDWARE QUALITY, OR ROOM ACOUSTICS.
9. Limitation of Liability
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL CORR ACOUSTIC TECHNOLOGY CO., LTD., ITS DEVELOPERS, AFFILIATES, OR SUPPLIERS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, LOSS OF PROFITS, DATA LOSS, BUSINESS INTERRUPTION, INSTRUMENT DAMAGE, OR PERSONAL INJURY/HEARING DAMAGE) ARISING OUT OF OR IN CONNECTION WITH YOUR USE OF OR INABILITY TO USE SIMPLE TUNER.
OUR TOTAL CUMULATIVE LIABILITY FOR ANY CLAIMS ARISING FROM THESE TERMS OR YOUR USE OF THE APP SHALL NOT EXCEED THE TOTAL AMOUNT YOU PAID TO US TO USE THE APP (WHICH IS $0.00 USD FOR FREE USERS), OR $10.00 USD, WHICHEVER IS LESS.
10. Modifications to the App and Terms
We reserve the right, at our sole discretion:
To modify, update, suspend, or temporarily or permanently discontinue any feature or functionality of Simple Tuner at any time without prior notice.
To update or revise these Terms of Service at any time. Any changes will become effective immediately upon posting the updated Terms within the App or on our official website.
Your continued use of Simple Tuner following the posting of updated Terms constitutes your binding acceptance of the revised Terms.
11. Termination
You may terminate this Agreement at any time by uninstalling the App and deleting all copies from your devices. We reserve the right to suspend or terminate your right to access or use the App immediately and without prior notice if you breach any provision of these Terms.
12. Governing Law & Dispute Resolution
These Terms shall be governed by and construed in accordance with the laws of Taiwan (Republic of China), without giving effect to any principles of conflicts of law. Any dispute or claim arising out of or related to these Terms or the App shall be submitted to the exclusive jurisdiction of the Taiwan Nantou District Court in Nantou City, Taiwan.
13. Contact Information
If you have any questions, feedback, or inquiries regarding these Terms of Service, please contact us through our official support channels:
Official Website / Help Center: https://www.app.corr.tw/simple-tuner/en-simple-tuner
Email Contact: info@corr.tw