Terms of Service

Overview

These Terms of Service ("Terms") are a legally binding agreement between you and KOALA STACK DIGITAL (ABN 39194545109) ("we", "us", or "our") governing your use of the KikuPuku iOS application and any related services that refer to these Terms (collectively, the "Service").

KikuPuku is an app for learning Japanese vocabulary. By downloading, signing in to, or using the Service, you agree to these Terms. If you do not agree, do not use the Service. Our Privacy Policy explains how we collect and handle information and is incorporated into these Terms by reference.

Eligibility and Accounts

Access. KikuPuku requires an active subscription or trial to use the app. There is no free tier. Subscription access is managed through Apple's App Store and our subscription partners (RevenueCat and Superwall).

Sign-in. You must sign in with Apple or Google. We do not offer email-and-password registration. You are responsible for maintaining the security of your Apple or Google account and for all activity that occurs through your KikuPuku account.

Age. The Service is not directed at children under 13. By using KikuPuku, you represent that you meet the minimum age required by Apple and applicable law to enter into these Terms and to subscribe through the App Store.

Subscriptions and Billing

App Store billing. All subscriptions are billed through Apple's App Store. We do not process payment card details directly. Prices, billing currency, available plans, and any introductory offers (including free trials) are shown in the App Store and in-app paywall at the time of purchase and may vary by region. We do not guarantee any specific price in these Terms.

Plans and trials. KikuPuku offers subscription plans configured in our billing systems (for example, annual and monthly options). An annual plan may include an introductory free trial. Where a trial is offered, it typically requires a payment method up front and converts to a paid subscription unless you cancel before the trial ends, in accordance with Apple's rules.

Managing your subscription. You can view, change, or cancel your subscription at any time through your Apple ID account settings (Settings → Apple ID → Subscriptions). Cancelling stops future charges but does not automatically delete your KikuPuku account or local learning data.

Refunds. Refund requests are handled by Apple under Apple's App Store terms and policies, not by us directly.

The Service

Subject to these Terms and an active subscription or trial, we grant you a limited, personal, non-exclusive, non-transferable, revocable licence to use KikuPuku on devices you own or control for your own Japanese vocabulary learning.

KikuPuku includes features such as:

• saving and reviewing vocabulary using spaced repetition
• tracking learning progress, streaks, and related statistics
• custom decks and official premade decks (including JLPT-oriented and topic decks)
• handwriting (Write) practice for kanji
• capturing words via text search, photo text recognition (OCR), and audio recording with transcription (Listen)
• text-to-speech pronunciation playback
• optional manual cloud backup and restore for subscribers
• an optional global leaderboard

Local-first design. Your vocabulary, review history, photos, recordings, and most other learning data are stored primarily in a database on your iPhone. Network features process specific requests on our servers and return results to your device; they do not replace your on-device database as the primary store.

Cloud backup. If you use Cloud Backup, you manually save a compressed copy of selected learning data to our cloud storage. Backup does not run continuously in the background. You are responsible for creating backups if you want protection against device loss or app removal. Cloud backup does not include photo JPEG files or raw audio recordings.

Availability. We aim to keep the Service available and reliable, but we do not guarantee uninterrupted access. Features — especially those that depend on network connectivity or third-party providers — may change, be rate-limited, or be temporarily unavailable.

Educational and AI Disclaimers

Study aid only. KikuPuku is a vocabulary study tool. It is not a formal language course, certification programme, or guarantee of exam results (including JLPT or any other test). Metrics such as "words remembered" reflect app-defined spaced-repetition thresholds, not official language proficiency.

Automated and AI-generated content. The Service uses automated and AI-assisted processing for features such as word suggestions, enrichments, translations, example sentences, photo text recognition, audio transcription, and text-to-speech. This output may be inaccurate, incomplete, outdated, or contextually inappropriate. You are responsible for verifying important meanings, readings, and usage before relying on them.

No professional advice. Nothing in the Service constitutes professional, academic, immigration, legal, or other specialist advice.

Server Features and Rate Limits

Certain features send data to our servers for processing (for example, enrichment, search, OCR, transcription, and text-to-speech). These requests are authenticated to your account and subject to daily rate limits to manage cost and abuse. If you reach a limit, the relevant feature may be temporarily unavailable until the limit resets. Rate limits may change from time to time. Hitting a rate limit is not a paywall — it does not require an additional purchase beyond your subscription.

Your Content

Ownership. You retain ownership of the vocabulary, notes, photos, audio, and other learning content you create or import into KikuPuku, subject to third-party rights in any source material you use.

Licence to operate the Service. You grant us a limited licence to host, process, transmit, and display your content only as needed to provide the Service — for example, to run OCR or transcription, generate enrichments, store an optional cloud backup, and maintain cached word lookups that improve search for all users. This licence ends when your content is deleted from our systems, except where retention is required by law or reasonably necessary for backup integrity for a limited period.

Your responsibility. You are responsible for the content you add to the app and for ensuring you have the rights to use and process it (including photos and recordings of text or speech created by others).

Official Decks and Third-Party Materials

KikuPuku includes official premade decks and bundled learning assets (such as kanji stroke data derived from third-party sources). These materials are licensed for use within the app as part of the Service. They may not be copied, redistributed, or used to create a competing product except as permitted by applicable law.

JLPT-oriented decks are study aids. KikuPuku is not affiliated with, endorsed by, or sponsored by the Japan Foundation or JLPT organisers unless we state otherwise in writing.

Leaderboard

Participation in the global leaderboard is optional. If you join, you choose a public display name (handle) and your ranking is based on your count of "words remembered" as calculated by the app. Because KikuPuku is local-first, this count is reported from your device and is subject to reasonable server-side sanity checks — it is not independently audited by us.

You agree not to manipulate leaderboard rankings, impersonate others, use offensive handles, or otherwise misuse the feature. We may adjust, remove, or reset leaderboard entries that appear fraudulent or abusive.

Acceptable Use

You agree not to:

• use the Service in violation of applicable law
• attempt to circumvent subscription access, authentication, or rate limits
• reverse engineer, decompile, or scrape the Service except where permitted by law
• interfere with or disrupt the Service, servers, or networks
• upload, process, or share unlawful, infringing, harassing, or abusive content
• use automated means to access server features beyond normal app use
• misrepresent your identity or affiliation, including on the leaderboard

Intellectual Property

KikuPuku, including its software, design, branding, and original content we provide, is owned by us or our licensors and is protected by intellectual property laws. These Terms do not grant you any right to use our trademarks, logos, or branding without our prior written consent.

If you believe content in the Service infringes your rights, contact us at support@koalastack.com with sufficient detail for us to review the claim.

Account Deletion and Termination

By you. You may delete your account from Account → Delete Account in the app. Deletion permanently removes your authentication account, cloud backup (if any), leaderboard entry, and server-side records associated with your account, and deletes local app data as part of that process. Account deletion cannot be undone.

By us. We may suspend or terminate your access to the Service if you materially breach these Terms, misuse the Service, or if we are required to do so by law or by a platform provider. Termination of access does not entitle you to a refund except where required by law or Apple's policies.

Third-Party Services

The Service relies on third-party providers to operate, including Apple, Google, Supabase, RevenueCat, Superwall, PostHog, Sentry, AssemblyAI, and AI service providers accessed through our servers. Your use of those providers' services (such as Sign in with Apple, Sign in with Google, and App Store billing) is also subject to their terms and policies. See our Privacy Policy for more detail on how data is shared with these providers.

Disclaimers

To the fullest extent permitted by law, the Service is provided on an "as is" and "as available" basis without warranties of any kind, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement. We do not warrant that the Service will be uninterrupted, secure, or error-free, or that learning outcomes will meet your expectations.

Nothing in these Terms excludes, restricts, or modifies any consumer guarantee, right, or remedy that cannot be excluded under the Australian Consumer Law or other applicable non-excludable law.

Limitation of Liability

To the fullest extent permitted by law, KOALA STACK DIGITAL and its directors, employees, and contractors will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of profits, data, goodwill, or learning progress, arising from or related to your use of the Service — even if we have been advised of the possibility of such damages.

To the fullest extent permitted by law, our total liability for any claim arising out of or relating to the Service or these Terms is limited to the greater of (a) the amount you paid us for the Service in the twelve months before the event giving rise to the claim, or (b) AUD $100.

The limitations in this section do not apply to liability that cannot be limited under applicable law, including rights you may have under the Australian Consumer Law.

Indemnity

You agree to indemnify and hold harmless KOALA STACK DIGITAL from claims, damages, losses, and expenses (including reasonable legal fees) arising from your misuse of the Service, your content, or your breach of these Terms, except to the extent caused by our negligence or misconduct.

Changes to These Terms

We may update these Terms from time to time. We will update the "Last updated" date at the top of this page when we make changes. Your continued use of the Service after revised Terms are posted constitutes acceptance of the changes. If you do not agree to updated Terms, you must stop using the Service and may cancel your subscription through Apple.

Governing Law

These Terms are governed by the laws of Queensland, Australia, without regard to conflict of law principles. You agree that the courts of Queensland, Australia have non-exclusive jurisdiction over disputes arising from or relating to these Terms or the Service, except where applicable consumer law gives you the right to bring proceedings in another jurisdiction.

Contact

If you have questions about these Terms, contact us:

KOALA STACK DIGITAL
506 Kenilworth Skyring Creek Rd
Ridgewood QLD 4563
Australia
Phone: +61 478 944 736
Email: support@koalastack.com