Terms of Service

These Terms govern your use of Inku, the Japanese learning app for iPhone and the web. By using Inku, you agree to these Terms. If you disagree, please do not use the app.

We wrote this in plain language. If something is unclear, email app@inkujapanese.com and we will explain.

1. Who we are

Inku is operated by Bao Hua, a sole proprietor based in Calgary, Alberta, Canada (“we”, “us”). You are “you”.

2. Eligibility

You must be at least 13 years old to use Inku. If you are under the age of majority in your country, your parent or guardian must review and accept these Terms on your behalf.

By accessing or using Inku, you confirm that you meet these age requirements.

3. Your data and web account

The iPhone app and public browser learning tools store learning data locally on your device or in your browser. The private web app at /app requires an email-and-password account and stores your web learning data in a dedicated Cloudflare D1 database.

That means:

• Your signed-in web progress can be restored in another browser.
• You can export your web learning data and are responsible for keeping exported files private.
• You can delete your web account after confirming your password and a recent session.
• Your web account does not sync with the iPhone app. Web and iPhone progress and entitlements stay separate.
• Clearing local storage or removing the native app may erase local progress, subject to operating-system backups and copies you export.

See the Privacy Policy for the information we store, how account deletion works, and Cloudflare D1 backup retention.

4. Subscriptions and payments

How it works

Inku offers optional Pro subscriptions for iPhone and the web. iPhone Pro is billed through Apple In-App Purchase and managed via RevenueCat. Web Pro uses Stripe for payments and RevenueCat for subscription access. Depending on the purchase link, checkout opens on inkujapanese.com or on RevenueCat's hosted page. You can buy Web Pro as a guest or with a verified web account and link a guest purchase to your verified account. Web and iPhone subscriptions are separate; neither unlocks the other.

• Available plans and prices are shown before purchase.
• Your subscription starts after the applicable store processes the purchase (or as described before a trial begins).

Auto-renewal

Subscriptions renew automatically at the end of each billing period. The applicable store charges the payment method on file. You will not be asked to reconfirm each renewal unless the store requires it.

Renewal timing, payment retries, grace periods, and billing recovery are controlled by the store where you purchased the subscription.

How to cancel

You can cancel at any time through the store where you purchased Inku Pro: Apple subscription settings for iPhone, or the Stripe customer portal linked from your web account for current Web Pro subscriptions. For a previous web subscription, use its billing provider. The store's receipt, customer portal, or support pages provide the current steps. Email app@inkujapanese.com if you cannot find the web billing controls.

Cancellation normally prevents the next renewal, and access generally continues through the paid period. A refund, revocation, chargeback, store rule, fraud review, or applicable law may change that result.

Refunds

For iPhone purchases, Apple handles refund requests. For web purchases, contact us at the support address below. For a previous web subscription, follow its billing provider's refund instructions. We do not issue Apple store refunds directly.

If you believe a charge is a mistake, follow the refund instructions from the store where you paid, or email app@inkujapanese.com. The store evaluates the request under its own policies, and we may not have visibility into the decision.

Price changes

Prices, taxes, currency, trials, and introductory offers are shown by the applicable store. Store-required notice or consent applies to a subscription price change. You can cancel before a new renewal price takes effect, subject to the store's rules and applicable law.

5. Acceptable use

You agree not to:

• Use Inku for anything illegal.
• Reverse-engineer, decompile, or tamper with the app.
• Share, resell, or sublicense your web account or access to Inku Pro.
• Use automated tools to scrape content out of the app.
• Submit abusive content through the feedback or flag features.

If you break these rules, we may limit your web account or paid access where the applicable store entitlement, refund rules, and law allow.

6. Content ownership

Our content

All learning content in Inku (vocabulary, phrases, audio recordings, illustrations, copywriting, curriculum design, visual design) belongs to us. We license it to you for personal, non-commercial use while you are authorized to access Inku.

You may not:

• Copy, mirror, or republish our content outside Inku.
• Use our content to train AI models.
• Pass off our content as your own.

Your content

Your local notes, web custom words, and learning data belong to you. Local data stays under your control on your device or browser. Your signed-in web data is stored for your account as described in the Privacy Policy. Feedback you choose to send through the flag feature or by email leaves your device.

Feedback

If you send us feedback, a feature request, or a bug report, we may use it to improve Inku without owing you anything. You keep any rights you already had.

7. Disclaimer of warranties

Inku is provided “as is” and “as available”. We try hard to make it reliable and accurate, but we cannot promise:

• That every translation or pronunciation is perfect.
• That the app will be available 100 percent of the time.
• That your learning will produce any specific result.
• That every stored or local copy can be recovered after account deletion, device loss, or a service failure.

Language learning depends on you. Inku is a tool, not a guarantee.

To the fullest extent allowed by law, we disclaim all warranties, express or implied, including warranties of merchantability, fitness for a particular purpose, and non-infringement.

8. Limitation of liability

To the fullest extent allowed by law, our total liability to you for any claim arising out of these Terms or your use of Inku is limited to the amount you paid us in the 12 months before the claim, or 50 US dollars, whichever is greater.

We are not responsible for indirect, incidental, special, or consequential damages, or for lost profits or lost data.

Some jurisdictions do not allow these limitations. If you live in one of those jurisdictions, our liability is limited to the maximum extent allowed by the law where you live.

9. Termination

By you

You can stop using Inku at any time, delete your web account, remove the native app, or clear local browser data. Deleting a web account does not cancel a separate subscription. If you are a subscriber, cancel through Apple for iPhone or the Stripe customer portal for current Web Pro. Use the original billing provider for a previous web subscription so you are not billed again.

By us

We may restrict your web account or access to Inku Pro if you break these Terms, or remove the app from an app store or discontinue the web app, with reasonable notice where practical.

If we remove Inku Pro from sale, remaining access follows the applicable store entitlement, refund or revocation status, store rules, and consumer law.

10. Changes to the app

We are an indie product and we change quickly. We may:

• Add, remove, or redesign features.
• Change what is included in the free tier versus Inku Pro.
• Discontinue the app entirely, with reasonable notice.

If we make a change that meaningfully reduces what you are paying for, we will surface a notice in the app before it takes effect so you can cancel.

11. Changes to these Terms

If we change these Terms in a way that affects you, we will surface a notice in the app and update the date at the top. Continued use of Inku after the change means you accept the new Terms.

Small editorial edits (typos, clearer phrasing) do not require notice.

12. Governing law

These Terms are governed by the laws of Province of Alberta, Canada, without regard to its conflict-of-law rules. Any dispute arising out of these Terms or your use of Inku will be brought in the courts of Province of Alberta, Canada, and you consent to the jurisdiction of those courts.

If you live in a country that gives you the right to bring a claim in your local courts under local consumer-protection law, nothing here takes that right away.

13. Severability

If any part of these Terms is found to be unenforceable, the rest still applies.

14. Contact us

Questions about these Terms, your subscription, or anything else:

app@inkujapanese.com

Inku is operated by Bao Hua, a sole proprietor based at 903 8 Ave SW, Calgary, AB T2P 0P7, Canada.