Welcome to use Perfect Piano, an instrument app by Revontulet Soft Inc ("Revontulet Studio", "we", "our", "us").

Your privacy is important to us. This Privacy Policy explains how we collect, store, use and disclose your personal information when you use Perfect Piano app and related widget(the "Apps"), revontuletsoft.com and revontueltsoft.net (together, the "Website").

By using the Apps and the Website, you are consenting to the use of your personal information in the manner set out in this Privacy Policy. Please take some time to read this Privacy Policy, and make sure you are happy with our use and disclosure of your personal information. If you do not agree to any of the provisions of this Privacy Policy, you should not use the Apps or the Website. If you have any questions or concerns, you can contact us at revontuletstudio@gmail.com

Please note that this Privacy Policy only applies to the Apps and the Website(together, the "Platform"). When using the Platform, you may find links to other websites, apps and services, or tools that enable you to share information with other websites, apps and services. Revontulet Soft Inc. is not responsible for the privacy practices of these other websites, apps and services and we recommend that you review the privacy policies of each of these websites, apps or services before connecting your Facebook, Google + account or sharing any personal information.

Our Principles

We have a pretty simple approach to data protection and privacy, which can be summarized as follows:

You should know exactly what we do with your data.

  1. This Privacy Policy is designed to give you full transparency regarding our data protection practices. If there's anything that's not clear from this Privacy Policy, please feel free to email us at revontuletstudio@gmail.com.

You should have full control over your data.

  1. We've designed the Apps and Website to give you control over the information you publish and share using Perfect Piano and other services to which you login or connect with Perfect Piano. Please take full advantage of these tools and make sure you only share what you want to share.

App Behaviors

Explanation of required permissions by the APK

  1. android.permission.INTERNET

    These 3 permission is required by Perfect Piano to access internet. The use cases include:
    1. Download MIDI file for Learn to Play Mode
    2. Onlne Multi-Player Mode to play piano online with other user
    3. Contest Mode to get Achevement and Ranking list
    4. Google Admob Service to get AD Banner content

  2. android.permission.RECORD_AUDIO

    This permission allow Perfect Piano to record through phone MIC. The use case is when you playing the piano keybaord even sing along, You can record the sound at same time.

  3. android.permission.READ_EXTERNAL_STORAGE

    These 2 permission is required by Perfect Piano to access external storage(or SD card). The use cases include:
    1. Save downloaded MIDI file to external storage
    2. Save MIDI recordings to external storage
    3. Save Audio recordings to external stroage
    4. Read and Playback recordings from external stroage
    5. Load instrument plugins' sound from external stroage

  4. android.permission.WRITE_SETTINGS
    This permission allow Perfect Piano to set midi/audio recordings as Ringtone.

  5. android.permission.VIBRATE
    This permission allow Perfect Piano to vibrate when press keys on piano keyboard. This will make piano keyboard more responsive.

  6. com.android.vending.BILLING
    This permission is required by Perfect Piano to remove advertisement banner by pay 0.99 USD through Google Play.

Information we collect about you

  1. We get some basic information about you through Google Play Service. The information includes your nick name, profile picture and a url to your Google+ home page.

Google+ account Login

  1. You can sign up and log in to Perfect Piano using your Google+ account. When you sign in through Google+ Single Sign On Service, Google will ask your permission to share certain information from your Google+ account with Perfect Piano. This includes your user name, a link to your Google+ profile, your profile picture, and your list of friends. This information is collected by Google and is provided to us under the terms of Google's privacy policy.

How we use your personal information

We use the information that we collect about you for the following purposes

  1. Login Multi-Player Mode with Google+ Account. Match and play with other Google Play Game user(frineds in Google+ Circle or automatic match user).
  2. Login Contest Mode with Google+ Account. Access Multi-Player Game Achevement and Leaderboards. Show your game score in public Leaderboards.

Sharing of your personal information

  1. We will NOT share your personal information with any third party.
  2. We will NOT share your personal information with any other apps and networks.
  3. We will NOT share your personal information with other users.
  4. We will NOT share your personal information with other app developers.

Log out your account

  1. You can log out your account from the app. Our server does NOT save any your data.

Piano Circle Usage

Your Use of Content

  1. The Content on the Service, and the trademarks, service marks and logos ("Marks") on the Service, are owned by or licensed to Piano Circle, subject to copyright and other intellectual property rights under the law. Content is provided to you AS IS. You may access Content for your information and personal use solely as intended through the provided functionality of the Service and as permitted under these Terms of Service. You shall not download any Content unless you see a “download” or similar link displayed by Piano Circle on the Service for that Content. You shall not copy, reproduce, distribute, transmit, broadcast, display, sell, license, or otherwise exploit any Content for any other purposes without the prior written consent of Piano Circle or the respective licensors of the Content. Perfect Piano and its licensors reserve all rights not expressly granted in and to the Service and the Content. You agree not to circumvent, disable or otherwise interfere with security-related features of the Service or features that prevent or restrict use or copying of any Content or enforce limitations on use of the Service or the Content therein. You understand that when using the Service, you will be exposed to Content from a variety of sources, and that Piano Circle is not responsible for the accuracy, usefulness, safety, or intellectual property rights of or relating to such Content. You further understand and acknowledge that you may be exposed to Content that is inaccurate, offensive, indecent, or objectionable, and you agree to waive, and hereby do waive, any legal or equitable rights or remedies you have or may have against Perfect Piano with respect thereto, and, to the extent permitted by applicable law, agree to indemnify and hold harmless Perfect Piano, its owners, operators, affiliates, licensors, and licensees to the fullest extent allowed by law regarding all matters related to your use of the Service.

Your Content and Conduct

  1. As a Piano Circle account holder you may submit Content to the Service, including videos and user comments. You understand that Perfect Piano does not guarantee any confidentiality with respect to any Content you submit. You shall be solely responsible for your own Content and the consequences of submitting and publishing your Content on the Service. You affirm, represent, and warrant that you own or have the necessary licenses, rights, consents, and permissions to publish Content you submit; and you license to Piano Circle all patent, trademark, trade secret, copyright or other proprietary rights in and to such Content for publication on the Service pursuant to these Terms of Service. For clarity, you retain all of your ownership rights in your Content. However, by submitting Content to Piano Circle, you hereby grant Perfect Piano a worldwide, non-exclusive, royalty-free, sublicenseable and transferable license to use, reproduce, distribute, prepare derivative works of, display, and perform the Content in connection with the Service and Perfect Piano's (and its successors' and affiliates') business, including without limitation for promoting and redistributing part or all of the Service (and derivative works thereof) in any media formats and through any media channels. You also hereby grant each user of the Service a non-exclusive license to access your Content through the Service, and to use, reproduce, distribute, display and perform such Content as permitted through the functionality of the Service and under these Terms of Service. The above licenses granted by you in video Content you submit to the Service terminate within a commercially reasonable time after you remove or delete your videos from the Service. You understand and agree, however, that Piano Circle may retain, but not display, distribute, or perform, server copies of your videos that have been removed or deleted. The above licenses granted by you in user comments you submit are perpetual and irrevocable. You further agree that Content you submit to the Service will not contain third party copyrighted material, or material that is subject to other third party proprietary rights, unless you have permission from the rightful owner of the material or you are otherwise legally entitled to post the material and to grant Piano Circle all of the license rights granted herein. You further agree that you will not submit to the Service any Content or other material that is contrary to the Piano Circle Community Guidelines(this).
  2. Perfect Piano does not endorse any Content submitted to the Service by any user or other licensor, or any opinion, recommendation, or advice expressed therein, and Perfect Piano expressly disclaims any and all liability in connection with Content. Piano Circle does not permit copyright infringing activities and infringement of intellectual property rights on the Service, and Perfect Piano will remove all Content if properly notified that such Content infringes on another's intellectual property rights. Perfect Piano reserves the right to remove Content without prior notice.

Digital Millennium Copyright Act

  1. If you are a copyright owner or an agent thereof and believe that any Content infringes upon your copyrights, you may submit a notification pursuant to the Digital Millennium Copyright Act ("DMCA") by providing our Copyright Agent with the following information in writing (see 17 U.S.C 512(c)(3) for further detail): A physical or electronic signature of a person authorized to act on behalf of the owner of an exclusive right that is allegedly infringed; Identification of the copyrighted work claimed to have been infringed, or, if multiple copyrighted works at a single online site are covered by a single notification, a representative list of such works at that site; Identification of the material that is claimed to be infringing or to be the subject of infringing activity and that is to be removed or access to which is to be disabled and information reasonably sufficient to permit the service provider to locate the material; Information reasonably sufficient to permit the service provider to contact you, such as an address, telephone number, and, if available, an electronic mail; A statement that you have a good faith belief that use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law; and A statement that the information in the notification is accurate, and under penalty of perjury, that you are authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
  2. You may direct copyright infringement notifications to email: "revontuletstudio@gmail.com"For clarity, only DMCA notices should go to the Copyright Agent; any other feedback, comments, requests for technical support, and other communications should be directed to "revontuletstudio@gmail.com". You acknowledge that if you fail to comply with all of the requirements of this Section 5(D), your DMCA notice may not be valid. Counter-Notice. If you believe that your Content that was removed (or to which access was disabled) is not infringing, or that you have the authorization from the copyright owner, the copyright owner's agent, or pursuant to the law, to post and use the material in your Content, you may send a counter-notice containing the following information to the Copyright Agent: Your physical or electronic signature; Identification of the Content that has been removed or to which access has been disabled and the location at which the Content appeared before it was removed or disabled;
  3. If a counter-notice is received by the Copyright Agent, Piano Circle may send a copy of the counter-notice to the original complaining party informing that person that it may replace the removed Content or cease disabling it in 10 business days. Unless the copyright owner files an action seeking a court order against the Content provider, member or user, the removed Content may be replaced, or access to it restored, in 10 to 14 business days or more after receipt of the counter-notice, at Perfect Piano's sole discretion.

Others Information

International data transfers

  1. Revontulet Soft Inc is based in Cayman, and your personal information is collected, stored, used and shared in accordance with Cayman laws. However, from time to time, it may be necessary for us to transfer your personal data to the United States. You should be aware that privacy laws in the United States may not be equivalent to the laws in your country, and by using the Platform, you consent to the transfer, storage and processing of your personal information in the United States in accordance with this Privacy Policy and applicable law.

Changes and Updates to this Privacy Policy

  1. We may occasionally update this Privacy Policy, and when we do so, we will also revise the Effective Date set out below. Any changes to our Privacy Policy will always be available here so that Perfect Piano users are always aware of what information we gather, and how we might use and share that information. Please be sure to check back here from time to time to ensure that you are aware of any changes to this Privacy Policy. Any material changes to this Privacy Policy will be communicated to registered users by a notification to their account and/or by posting a notice of the change on the Website.


  1. If you have questions about this Privacy Policy, want to suggest changes to this Privacy Policy or want to know, what information we store about you, please contact us by email at revontuletstudio@gmail.com.

Last amended: 30 June 2014