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Effective date: July 23, 2026
This policy applies to the Fingerchase app and its official support pages. “We” means Parsifal Chen, the app provider shown on the App Store. Apple, GitHub, websites opened from the app, and destinations you choose in the system share sheet process information under their own terms and privacy policies.
Fingerchase is designed to work primarily on your device. Personal scores, imported images/PDFs/audio, microphone audio, recognition results, and detailed performance content are not uploaded to our servers. The app sends only the limited data described below when you deliberately submit in-app feedback or voluntarily join the referral and rewards program. Network activity handled by the relevant provider may also occur when you use Apple subscription services, open external links, visit support pages, or share text through another app.
The app may store practice and viewing history, favorites, settings, onboarding and daily-goal choices, trial and entitlement counters, permanently unlocked pieces, personal-score metadata and files, conversion results, piano-calibration data, and recognition-optimization parameters. This information supports requested features, restores local state, personalizes practice, and enforces trial or subscription access. Except for the referral-eligibility summary described below, complete practice history and performance content are not sent to us.
Structured scores, images, PDFs, and audio are accessed only after you explicitly select them with the system file picker. The app may copy the selected file into its private app storage, create temporary working files, and save derived score or conversion results. Personal content is not uploaded to us. The app does not provide public links, export, printing, or sharing for personal scores, note data, source files, or recordings. You should import only content you have the right to use and avoid importing information you consider highly sensitive.
Microphone permission is requested only when you start real-piano practice, calibration, or recognition optimization. Audio frames are analyzed on the device while the feature is active; raw microphone audio is not uploaded to us or saved by the app as a recording. Derived calibration or optimization parameters may remain on the device until you delete them. Because an active microphone can capture nearby sounds, use the feature only when appropriate and stop it before private conversations.
Apple processes purchases, renewals, refunds, payment credentials, fraud prevention, and Apple Account information. The app receives limited StoreKit information such as product, transaction verification, subscription state, and expiration so it can provide Pro access; we do not receive your full card details. Depending on your device and Apple privacy settings, Apple may also make limited crash reports or aggregated diagnostics available to help us fix defects. Apple controls its own collection, security, and retention.
Only when you tap Send Feedback does the app send the category and text you entered, the app/build version, system locale, and a random installation identifier to our service. The server stores only the SHA-256 hash of that installation identifier for abuse prevention. Feedback has no attachments and does not automatically include scores, recordings, or practice history.
The referral and rewards program is optional. If you join, Sign in with Apple confirms a unique identity without requesting your name or email address. Our service stores the app-specific Apple user identifier, invitation code and relationship, first-use and onboarding-completion times, eligible practice-session ID/start/end/effective duration, redeemed permanent pieces and rewards, subscription transaction ID/product/purchase/expiration or revocation times needed to verify rewards, and App Attest integrity keys, receipts, and counters. This information is linked to the referral identity and used only for authentication, duplicate and fraud prevention, eligibility decisions, reward delivery and synchronization, and refund handling. It is not used for advertising or cross-app tracking. Eligibility reports do not contain played notes, accuracy, recordings, score content, or complete practice history.
Free features and purchasing or restoring Pro do not require a Fingerchase account. Unless you deliberately use feedback or referrals as described above, we do not request your name, email address, contacts, precise location, health data, biometric data, or unrestricted photo or file-library access. We do not include third-party advertising or behavioral analytics SDKs, use an advertising identifier, track you across other companies' apps or websites, build advertising profiles, sell personal information, or use personal data for legally or similarly significant automated decisions.
Apple provides App Store, subscription, Sign in with Apple, and App Attest services. Cloudflare hosts our feedback and referral service. These support pages are hosted by GitHub Pages, which states that it logs visitors' IP addresses for security. GitHub Issues are public, so never include passwords, payment information, personal scores, recordings, invitation codes, or other sensitive information. External sites receive browser requests and information such as your IP address. A destination you deliberately choose in the system share sheet receives the shared text under its own practices. Fingerchase does not automatically send personal score content to these parties.
Where applicable law requires a legal basis, on-device processing provides features you request; subscription processing fulfills requested purchases; and feedback and referral data support services you deliberately choose and our legitimate interests in functionality, fraud prevention, security, and customer support. Information may also be handled when required by law. You may withdraw microphone permission, stop using optional features, or sign out of the local referral session. Withdrawal does not affect prior lawful processing or automatically remove records that must be retained for delivered rewards, refunds, disputes, duplicate prevention, fraud prevention, security, or legal obligations.
You can delete personal scores and related practice data, calibration data, and recognition-optimization data in the app. Other local history, favorites, settings, and access state remain until app data is removed or the app is uninstalled; Apple-managed backups may retain copies. Feedback records are kept only as needed to handle feedback, improve the product, and prevent abuse. Referral identity, eligibility, reward, related transaction, and security records are kept while the program operates and as needed to handle rewards, refunds, disputes, duplicate and fraud prevention, security, and legal obligations. Deleting the app does not cancel a subscription or automatically delete existing feedback or referral records from the server.
You can revoke microphone permission, delete supported local content, uninstall the app to remove remaining active local data, manage Apple backups and subscriptions, and choose not to submit feedback, join referrals, open external links, or share. To request access, correction, or deletion of data held by our feedback/referral service, email 962412311@qq.com. To prevent impersonation, we may ask for the invitation code shown in the app, an approximate feedback time, or other necessary verification details. Minimal records may remain for delivered entitlements, refunds, disputes, duplicate and fraud prevention, security, or legal obligations. Requests for information held independently by Apple, GitHub, Cloudflare, or another destination should be directed to that provider.
We reduce risk through app-scoped storage, system permissions, explicit file selection, on-device processing, HTTPS, server-side token hashing, App Attest integrity checks, and encrypted backups. No device, software, server, backup, or transmission method is completely secure. Use a device passcode, keep software current, review backup and sharing settings, retain lawful copies of important files, and do not submit sensitive content through public channels.
Fingerchase does not require an account or provide targeted advertising. We do not knowingly use feedback or referral services to process children's personal information beyond what is needed to provide those features. Parents or guardians should supervise a minor's device use, feedback, referrals, file imports, microphone use, external links, sharing, and purchases, and use Apple's family and purchase controls.
Your personal scores, imported files, microphone audio, and detailed performance content are not uploaded to our service. The limited feedback and referral data described above, and information handled by Apple, Cloudflare, GitHub, external websites, and share destinations, may be processed in other countries or regions according to service locations, privacy notices, and applicable safeguards.
We will update this policy and its effective date before or when our data practices materially change. Use our public support page for general product questions, but never include personal or sensitive information in a public GitHub Issue. For access, correction, deletion, or other privacy-rights requests, email 962412311@qq.com instead.