InkBrook · Privacy Policy

Effective date: June 30, 2026

Introduction

InkBrook ("the app") is a personal memory and learning tool developed and operated by Dalian Junjing Xiyu Technology Co., Ltd. (大连峻境溪语科技有限公司) ("we"). It helps you turn every study session into a complete process of learning something and keeping it for the long term.

The app is a tool, not an education product: it is positioned as a productivity/utility app, not an education or training product. It does not create exercises, teach lessons, or provide any teaching content; everything you study in the app is created by you. It is intended for learners of all ages and is not directed specifically at minors. Your account and data belong entirely to you, and we will not provide them to any third party for their own purposes without your consent.

The app is local-first: we run no servers of our own, the app does not upload your study data to us, and we can neither receive nor see your study records. Your data lives on your own device by default.

This policy explains how we treat your information and what rights you have. To get the essentials quickly, we suggest focusing on: "1. What information we collect," "4. Optional iCloud sync," "7. Disclosure and cross-border processing," "11. Your rights," and the contact details at the end. This policy applies to the iOS client of the app and its features.

1. What information we collect

The app collects very little, and almost all of it stays on your own device and is never sent to us. Our legal basis for processing is your consent, and some of it is necessary to deliver the features you use. It falls into three categories.

(1) Information you provide

You fill in or create all of this yourself. It stays on your device unless you turn on iCloud sync (see Section 4); otherwise it never leaves your device.

(2) Sign-in information

The app requires sign-in via Apple's "Sign in with Apple," tied to your Apple Account. It is entirely local, with no sign-in server. You can sign out anytime in Settings, or use "Delete local data and sign out" to clear everything.

(3) We collect nothing automatically

The app includes no third-party analytics, crash reporting, or advertising SDKs, and uses no advertising identifiers. We do not automatically collect device information, usage behavior, or location for analytics or advertising.

2. How we use this information

All use happens on your device, solely to make the app work for you:

We do not use your information for profiling, personalized advertising, or cross-user comparison, and we do not analyze your study content for those purposes.

3. Storage and "local-first"

By default the app keeps all your data on your own device:

Retention and deletion:

4. Optional iCloud sync

The app offers optional iCloud sync to keep your study data aligned across your own devices. It is off by default and only you can turn it on.

Three conditions must be met first:

  1. You turn on the "iCloud Sync" switch in Settings;
  2. You confirm "I am 14 or older and have my guardian's consent";
  3. You have unlocked the corresponding paid entitlement.

Once on, your study data syncs to your own iCloud private database (container iCloud.com.junxi.memorycard), solely to align your own devices. Apple iCloud hosts the data under your Apple Account, subject to Apple's terms and privacy policy.

Note: that iCloud database belongs to your Apple Account and is hosted by Apple—it is not a cloud service we operate. We have no servers and cannot receive or view its contents. You can turn sync off anytime in Settings. For where this data is stored and possible cross-border scenarios, see Section 7.

5. Device permissions

The app requests the following permissions only when you use the corresponding feature; you can turn them off anytime in system Settings, and declining does not affect basic use.

(Permission / Purpose / Notes)

About photos: the app uses the iOS photo picker (PhotosPicker) to select problem or answer photos. The picker runs outside the app and returns only the image you chose, so the app needs no photo-library permission and never shows a library authorization prompt.

The app does not use location, contacts, calendar, or health permissions.

About notifications: review reminders are local notifications (at most one daily summary—no barrages). We run no push servers and send no marketing pushes. With iCloud sync on, your device may receive iCloud sync updates through Apple's push mechanism, which is provided by Apple and never used for ads or reporting personal data.

6. About speech recognition

When you use speech-to-text, recognition is performed by Apple's system speech service. Your audio snippets may be sent to Apple for processing; on supported devices and scenarios, recognition happens on-device without upload. Apple performs this processing as an independent service provider under its own terms and privacy policy; where the data is processed depends on Apple's service arrangements—see Section 7.

We receive only the converted text, which is stored solely on your device; we neither receive nor keep your original audio for any other purpose.

7. Disclosure and cross-border processing

The app has no servers of its own. We do not sell, rent, or provide your personal information to any third party for their own purposes.

All external capabilities involved are Apple system services: Sign in with Apple, optional iCloud sync, App Store in-app purchases, and speech recognition. In these scenarios Apple, as an independent processor, handles the information under its own terms and privacy policy; we require it to fulfill the corresponding security obligations. We ourselves receive and retain none of this data through any backend.

On cross-border processing: with no servers, we do not actively transfer your personal information outside mainland China. The Apple system services above are handled by Apple as an independent provider under its own terms. iCloud data for mainland-China Apple Accounts (including this app's synced data) is stored within mainland China and does not leave the country; if you use a non-mainland Apple Account, or speech recognition is routed to Apple's services abroad, processing may occur outside mainland China under Apple's responsibility. iCloud sync and voice input are optional—leave them off and no such data flows occur.

8. What we promise not to do

9. About payment

Payment goes through the Apple App Store as an auto-renewing subscription (monthly or yearly), each with a 7-day free trial that auto-renews when it ends. The free trial is available once per Apple Account (monthly and yearly share the same trial); accounts that have used the trial are charged immediately upon confirming a new subscription. You can cancel anytime in Settings › your name (Apple Account) › Subscriptions; after cancellation the subscription lapses at the end of the current period.

Apple App Store collects the payment; we never collect or store your payment account or card details. For refunds, use Apple's refund channels. Where eligible, subscriptions generally support Family Sharing. Launch pricing may rise later; the App Store price at purchase is final.

10. How we protect information

Your data lives mainly on your own device, protected by iOS security mechanisms; the sign-in identifier lives in the system Keychain. We follow data minimization: we process only what the app needs to work, and skip whatever we can.

Because study data never passes through any backend of ours, transfer and breach risks are correspondingly reduced. We take reasonable technical and organizational measures to protect your information, but please understand no method is absolutely secure. If a security incident such as leakage, tampering, or loss occurs, we will take remedial measures promptly as required by law and notify you and the relevant regulators when necessary.

11. Your rights

You have the following rights over your information, most exercisable directly in the app:

For further help, to exercise these rights, or to lodge a complaint, contact us via the email at the end of this policy; we will respond within a reasonable time. If you are unhappy with how we handle personal information, you may also complain to the cyberspace, market-regulation, or other personal-information-protection authorities.

12. Updates and contact

We may update this policy from time to time. Updates will carry a new effective date on this page; for material changes we will notify you appropriately.

Personal information collection list

The table below lists every kind of information the app may involve: type, when it arises, purpose, where it is stored, whether it is required, and whether it is shared with third parties. Two notes apply to the whole table:

Meanings of "storage location" values (individual rows may note otherwise): On device = in the local database or files on your device; Keychain = in the device's system Keychain (this device only, not synced via iCloud Keychain); Optional iCloud = on device by default, synced to your own iCloud private database (hosted by Apple under your Apple Account) only after you actively turn on iCloud sync. Individual rows use other phrasings, e.g., voice "not retained (discarded once transcribed)," review reminders "on device (local notifications)," widgets "on device (App Group shared container)," purchases "handled by the Apple App Store."

About iCloud sync: off by default. Turning it on requires flipping the switch yourself, confirming "I am 14 or older with guardian consent," and unlocking the paid entitlement—all three. Once on, study data syncs only to your own iCloud private database (iCloud.com.junxi.memorycard) to align your own devices; the developer has no servers and can neither receive nor see the data, which Apple iCloud hosts under your Apple Account and its terms and privacy policy.

(Type / When / Purpose / Storage / Required? / Shared with third parties?)

Device permissions: camera, microphone, speech recognition, and notifications are requested as needed; you can decline or revoke them anytime in system Settings. The related feature stops working, but everything else is unaffected.

Your own avatar photo: used only for local display; the developer performs no facial recognition, extracts no biometrics, and uploads nothing (it enters your own iCloud only if you turn on sync).

Problem photos: photos you take or pick may contain faces or other sensitive content. They are attached locally to your study entries to aid recall; the developer performs no facial recognition, extracts no biometrics, and uploads nothing (your own iCloud only, if you turn on sync).

Sensitive personal information and minors: birthday is optional; if provided, it is used only for profile display and age-based review pacing, and you can change or clear it anytime. Under the Personal Information Protection Law, personal information of children under 14 is sensitive—children under 14 should use the app with guardian knowledge and consent, and their information is handled under the rules for sensitive personal information with separate consent and extra protection.

Apple-handled system services: Sign in with Apple, optional iCloud sync, in-app purchase, and speech recognition are handled by Apple as system-service provider under Apple's terms and privacy policy; where the data resides depends on your Apple Account region (mainland-China accounts' iCloud data is hosted by the domestic operator). The developer has no servers and retrieves none of this data from Apple.

Retention and deletion: local information stays on your device until you delete it. Deleted entries go to the Recycle Bin, kept up to 30 days, then cleared; uninstalling removes all local data. Voice is never retained—discarded once transcribed.

Processor and your rights: the personal-information processor for this app is Dalian Junjing Xiyu Technology Co., Ltd. (大连峻境溪语科技有限公司) (contact: junxi@junjingxiyu.cn). You have the rights to access, copy, correct, delete, withdraw consent, and deregister; see the policy body for how to exercise them.

Information the app does not touch: no location, contacts, calendar, or health data; your study data is never reported to any third party.

That is the complete list of information the app may involve; see the table above for details.

Third-party sharing list

This list is part of the InkBrook Privacy Policy and carries the same force as the body text.

InkBrook has no servers of its own and uploads or collects none of your personal information to any server of the developer (Dalian Junjing Xiyu Technology Co., Ltd. 大连峻境溪语科技有限公司). The developer can neither receive nor see your study data. The app integrates no third-party analytics, crash reporting, or advertising SDKs.

Below are the Apple system services the app may involve, plus the local open-source libraries bundled with it. Apple services are provided by Apple, with data handled under Apple's terms; the local libraries run only on your device and collect and transmit nothing.

(Name / Provider / Trigger / Data involved / Data flow / Applicable privacy policy)

On cross-border processing

The app has no servers and does not actively transfer your personal information outside mainland China. Everything above is an Apple system service handled by Apple as an independent provider under its own terms and privacy policy:

iCloud sync and voice input are optional—leave them off and none of these data flows occur.

Your control over these flows

Notes on the table:

For any questions about this list or data handling, or to access, correct, or delete your personal information, contact us at junxi@junjingxiyu.cn.

Children's personal information protection

InkBrook is for all ages—a personal memory and learning tool. Since users may include minors, we treat this information strictly under the Personal Information Protection Law, the Provisions on the Cyber Protection of Children's Personal Information, and related regulations, and explain it in this dedicated section.

1. Audience and age

If you are a minor, please use the app with your guardian's knowledge and consent. If the user is a child under 14, a guardian should read this policy and consent on the child's behalf before use; the guardian may also help manage, access, correct, or delete the child's study data.

2. Guardian consent (children under 14)

By law, personal information of children under 14 is sensitive. We process it only with the guardian's separate consent, following data minimization—only what the features require. That consent is obtained when the guardian reads this policy and confirms; it can be withdrawn anytime (see Section 3). Birthday is optional—leave it blank, or change or clear it anytime; if unnecessary, we suggest leaving it blank.

By default the app keeps data only on the device you (or the child) use, with no automatic upload. Optional iCloud sync is off by default; enabling it requires confirming "I am 14 or older with guardian consent" and unlocking the paid entitlement (the same entitlement gate as for all users, regardless of age). Because sync cannot be enabled before this age confirmation, data of children under 14 is never uploaded to iCloud through this app and always stays on the device.

Retention: we keep minors' information only as long as the features require. Entries deleted in the app go to the Recycle Bin, kept up to 30 days, then cleared; uninstalling removes local data.

3. Rights a guardian may exercise

A guardian may exercise the following on behalf of a child under 14—mostly right in the app, or with our help via the contact at the end of this section:

(Right / How)

Signing out only clears the locally stored Apple sign-in identifier and does not affect other processing, so it is not listed as a way to withdraw consent. If the guardian does not consent or withdraws consent: children under 14 should not use the app before guardian consent is obtained; upon withdrawal we stop the corresponding processing and delete the information at your request (withdrawal does not affect processing already carried out).

4. Our principles for minors' information

  1. Data minimization: only what the features require, never demanding information unrelated to functionality; stage, grade, gender, and birthday are all optional.
  2. Stays on device: minors' study content and profile stay on the device in use by default; we have no servers and can neither receive nor see the data.
  3. No third-party disclosure: we never report minors' data to anyone, nor sell or trade it.
  4. System services involved: sign-in, optional iCloud sync, in-app purchase, and speech recognition are provided by Apple under Apple's terms and privacy policy. Speech recognition converts speech to text and may send audio snippets to Apple (some devices support on-device recognition); if unwanted, don't use the feature or don't grant microphone/speech permissions.

5. No manipulative mechanics for minors

The app's growth rewards only reward real study actions and compare you only with your past self. No lottery- or gambling-style random rewards, no rankings or comparisons between users, and no mechanics that tempt users to go through the motions for rewards. This applies to everyone, minors above all.

6. Issues and contact

We designate a person responsible for children's personal information protection. If you believe we collected a child's (under 14) personal information without guardian consent, or a guardian wishes to access, correct, or delete such information, contact us below; once verified, we will delete the information promptly.

(Matter / Contact)

Account deletion and data removal

InkBrook has no servers and no backend account system. Your profile and study records live only on your own device by default; Dalian Junjing Xiyu Technology Co., Ltd. (大连峻境溪语科技有限公司) ("we") can neither receive nor see them. So "account deletion and data removal" here doesn't mean closing an account on some server—it means a few steps you take on your own device and in Apple's systems. Control stays with you; do it anytime, no need to go through us.

Four steps follow. Do only the ones you need: to wipe records but keep sign-in, step 2 alone is enough; to stop using the app entirely, walk through all four.

For readability, "Settings" below means the settings page opened by tapping your avatar at the top right of any page—the app has no separate Settings tab; enter via the avatar.

1. Sign out, and remove the Apple credential in the system

The app signs in with Sign in with Apple, which is required for use. You can sign out anytime, or "Delete local data and sign out."

1. Sign out in the app: tap your avatar on any page, go to Settings → Account, tap Sign out. This clears the Apple sign-in info stored locally (the Apple user identifier, plus the name/email returned at sign-in) but never touches your study data; your records stay on the device and are available again after you sign back in.

2. To have Apple stop associating the app with your Apple Account, remove the credential in the system: iPhone Settings → your name at the top → Sign in with Apple → InkBrook → Stop using Apple Account (older systems may say "Stop using Apple ID"; follow the actual interface). Apple performs this step, it affects the Apple-side association, and Apple's terms and privacy policy govern it.

2. Delete local study data

Your profile, goals, summaries, review cards, problem photos, growth and check-in records all live on the device. Two ways to delete:

Option 1 · Delete in the app (recoverable): deleting an entry from its detail page or a list sends it to the Recycle Bin for up to 30 days. Within those 30 days, restore it under Settings → Recycle Bin or delete it permanently; after 30 days it is automatically and permanently cleared.

Option 2 · Uninstall the app: uninstalling InkBrook removes the study data stored on this device. Note: the Apple sign-in identifier lives in the system Keychain and may not be cleared by uninstalling. To remove the credential too, sign out in the app first (step 1), then uninstall.

(Goal / Action / Result)

3. If you ever enabled iCloud sync

iCloud sync is off by default and enabled only by you. Only if you turned it on has study data synced to your own iCloud private database (solely to align your own devices). Apple hosts it under your Apple Account; we have no servers and can neither receive nor see it. To delete synced data, operate on your Apple devices and iCloud:

1. Turn off sync first: tap your avatar on any page, go to Settings → iCloud Sync, switch it off.

2. On every device that used sync, delete local data as in step 2 (in-app deletion or uninstall). Deleting entries on a device with sync still on usually propagates the deletion through the sync channel to the corresponding data in your iCloud.

3. Delete the iCloud copy: open Settings → your name at the top → iCloud, enter iCloud storage management (called "Manage Account Storage" or "Manage Storage" depending on the system). If InkBrook is listed, delete its iCloud data as prompted; the exact entry and whether the app is listed follow the actual interface. If you can't find the entry, fall back to step 2—delete in-app and let sync propagate—or email us for guidance. Apple iCloud performs this step under Apple's terms and privacy policy.

Note: uninstalling alone clears only this device's local data, not the copy already in iCloud—synced data must be deleted in iCloud separately as above. Also, if you delete data on one device but keep it on another signed in to the same Apple Account with sync on, the data may sync back. Best to turn off sync on all devices first, then clear them one by one. (Re-enabling sync later again requires confirming you are 14 or older with guardian consent, plus the paid entitlement.)

4. About purchases

Payment is an auto-renewing subscription collected by the Apple App Store; we never collect or store your payment details. Deleting local data or signing out never affects your subscription—it is tied to your Apple Account, and after switching or reinstalling you can recover it in-app via Restore Purchases. Subscription and refund records live with the Apple App Store, not in the app; for refunds, use Apple's channels. After expiry or cancellation, your local study data remains intact and reviewable—never deleted or locked (except batch-imported cards: their review scheduling pauses while unsubscribed, the content stays browsable in the app, and resubscribing restores it).

5. Need help

Almost all deletion can be done by you in the app or system Settings. If you hit a snag, or want to confirm everything is gone, email us: junxi@junjingxiyu.cn. We will reply within 15 business days and guide you through; but please understand that since we hold none of your data, we can only guide—we cannot delete what lives on your device or in your iCloud on your behalf.

About minors: if the user is a child under 14, the guardian holds the rights to access, copy, correct, and delete the child's personal information, may follow the steps above to help manage it, and may contact us at junxi@junjingxiyu.cn to exercise these rights. If you believe children's information was collected without guardian consent, contact us at the same address.

Your data lives on your own device (and in your own iCloud if you enabled sync). Whether and what to delete is entirely your call.

Contact and filing

This document is a translation of the Simplified Chinese original. In case of any discrepancy, the Simplified Chinese version shall prevail.