Terms & Conditions

Effective date: 2026-10-20 · Previous version: 2026-10-17

About these Terms

These Terms and Conditions ("Terms") apply to the mobile applications published by MintWave Studio on Google Play and, once released there, the Apple App Store, together with any related services we operate (each an "Application"). They currently include Hatch Day, Cable Calc, MultiTimer, Days Until, Daily Budget, Rhythm Trainer, Shadow Match, Trivia Showtime (formerly Smart Quiz), ZeroMargin and Steady Hand, and they also apply to any other Application we publish that links to these Terms. A list of our Applications is on our apps page. MintWave Studio is referred to as the "Service Provider", "we" or "us".

By downloading or using an Application, you agree to these Terms and to our Privacy Policy. If you do not agree, please do not use the Application. Where a section applies only to some Applications, it says so.

Eligibility

You must be at least 13 years old to use the Applications, or older if the law where you live requires it. If you are below the age at which you can consent to data processing where you live (up to 16 in some countries of the European Economic Area), a parent or guardian must make any consent choice the Application asks for, such as for personalized ads. If you are under the age of majority where you live, you may only use the Applications, and make purchases, with the permission of a parent or legal guardian, who accepts these Terms on your behalf.

License to use the Applications

Subject to these Terms, we grant you a limited, personal, non-exclusive, non-transferable, revocable license to install and use the Applications on devices you own or control, for your personal use or for the internal purposes of your business or work (for example Cable Calc on site or MultiTimer in a kitchen). Reselling, sublicensing or offering an Application as a service to others is not permitted.

You may not:

• copy, modify, distribute, sell or rent the Applications, or create derivative works from them;
• reverse engineer, decompile or disassemble the Applications, except where the law expressly allows it;
• bypass, disable or tamper with paid features, purchase checks, advertising or security measures, or use modified versions of the Applications to unlock Pro features without paying;
• use the Applications for any unlawful purpose or in a way that could damage, overload or impair them or our services.

Intellectual property

The Applications, including their code, design, text, graphics, sounds, rhythm patterns, puzzles, names and logos, are owned by MintWave Studio or its licensors and are protected by intellectual property laws. These Terms do not give you any right to use our trademarks, logos or branding. Third-party names and marks shown in an Application belong to their owners.

Some content is provided by third parties under its own licence, and that licence applies to it instead of the restrictions above. In particular, the questions in Trivia Showtime (and the earlier Smart Quiz) come from the Open Trivia Database and are licensed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0).

Free versions and advertising

All Applications are free to download. On Android, the free versions of Hatch Day, Cable Calc, Rhythm Trainer, Shadow Match, Trivia Showtime, ZeroMargin and Steady Hand show ads served by Google AdMob. The iOS versions of our Applications (iPhone and iPad) show no ads. MultiTimer, Daily Budget and Days Until do not show ads. Ads are shown in line with your consent choices, which you can change at any time through Privacy options in the Application's menu or settings (where shown). Ads are provided by third parties. We are not responsible for the content of third-party ads or the websites and apps they link to.

Some Applications offer optional rewarded ads, for example a hint in Shadow Match. Watching one is always your choice. The reward is given only when the ad has been shown in full, and it may be unavailable when no ad can be loaded.

Pro upgrades, subscriptions and purchases

Some Applications offer an optional paid upgrade that unlocks additional features and, in Applications that show ads, removes them. It is called Pro in most Applications (including Trivia Showtime, previously Smart Quiz Plus in Smart Quiz) and Premium in Shadow Match; in these Terms we call all of them "Pro". The features included for each Application are described on its upgrade screen and store listing.

How you pay

All purchases are made through Google Play or the Apple App Store and are subject to their terms of service and payment policies. We never receive your payment card or bank details. Prices are shown in the Application and the store in your local currency, including any applicable taxes, before you confirm a purchase.

Subscriptions

• Automatic renewal: subscriptions (for example monthly or yearly) renew automatically at the end of each billing period at the then-current price, unless you cancel at least 24 hours before the end of the current period.
• Cancelling: you can cancel at any time in Google Play (Payments & subscriptions > Subscriptions) or in your Apple ID subscription settings. Some Applications also link there from their menu ("Manage subscription"). After you cancel, Pro stays active until the end of the period you have paid for. Uninstalling the Application does not cancel a subscription.
• Free trials: where a free trial is offered, it converts automatically into a paid subscription at the end of the trial unless you cancel before it ends. Trial eligibility is decided by the store and is usually limited to one per account.
• Price changes: if the price of a subscription changes, the store will notify you in advance and, where required, ask for your consent before the new price applies to you.

One-time (lifetime) purchases

A one-time "lifetime" purchase unlocks the Pro features of that specific Application for as long as we make that Application available and you keep the store account you bought it with. It does not include future separate applications, and it is not transferable to another store account.

Consumable purchases and tips

Some Applications sell items that are used up, such as the hint packs in Shadow Match. They are added to the Application on your device when the purchase completes. Items you have used cannot be returned, and unused items are stored on your device, so they are lost if you delete the Application's data; they cannot be restored from the store. Earlier versions of some Applications offered voluntary tips; a tip supports development and does not unlock features.

Restoring purchases

Your purchases are linked to your Google Play or Apple account, not to your device. If you reinstall an Application or change devices, use Restore purchases in the Application while signed in to the same store account. This restores subscriptions and one-time upgrades, not consumable items.

Refunds and your right of withdrawal

Refunds are handled by the store you purchased from, under its refund policies. For Google Play, see Google Play's refund policy; for the App Store, request a refund at reportaproblem.apple.com. You can also contact us at support@mintwavestudio.com if something went wrong and we will help where we can.

If you are a consumer in the European Union or the United Kingdom, you normally have a 14-day right to withdraw from online purchases. Because Pro is digital content supplied immediately after purchase, you agree, when you confirm the purchase, that supply begins right away, and you acknowledge that you lose the right of withdrawal once supply has begun, to the extent permitted by law. This does not affect your rights if the digital content is faulty or not as described.

Changes to Pro

We may improve, add or change features over time. We will not remove the core features advertised for Pro during a subscription period you have already paid for, except where necessary for legal, security or technical reasons outside our control. If we discontinue an Application or a paid feature, we will give reasonable notice where possible and, where required by law, offer a pro-rata refund of prepaid subscription fees.

Your data and content

Most of the content you create in the Applications (such as practice history, routines, budgets, timers, expiry lists, incubation logs, saved calculations and settings) is stored on your device. How we and our service providers handle personal data is described in our Privacy Policy.

• Backups: you are responsible for keeping backups of important data, for example through your device's backup or the export features an Application offers. Deleting an Application, clearing its data, or losing or resetting your device may permanently delete content stored only on the device. We cannot recover it.
• Data about other people: if you store other people's personal data in an Application (for example customer names in Cable Calc projects or reports), you are responsible for having a lawful basis to do so and for handling that data in line with applicable data protection laws.
• Sharing: when you share content from an Application (such as a score, a challenge code, a report or a PDF), you choose who receives it, and you are responsible for what you share. The Applications do not host public user content.

Important notices for specific Applications

The Applications are tools and games for general use. They do not replace professional advice, and you remain responsible for decisions you make based on them.

• Cable Calc: results are calculated from the values you enter and the referenced standard (IEC 60364), and are for guidance only. Electrical installations must be designed, checked and carried out by a qualified person in accordance with the regulations that apply where you are. Always verify results before relying on them.
• InvoiceLens (when released): the Application displays the contents of electronic invoices. It does not provide tax, accounting or legal advice, and it does not certify that an invoice is valid or compliant. Check important details against the original document and with a qualified adviser.
• Daily Budget: budgets, allowances, projections and summaries are based on the figures you enter and are not financial advice. The app lock (PIN or fingerprint) helps keep casual viewers out but does not replace your device's own security.
• Hatch Day (and Sire & Dam when released): schedules, countdowns, targets and reminders are general guidance based on typical values and the data you enter. They are not veterinary advice. Animal health, breeding and welfare decisions should be made with a qualified veterinarian.
• Days Until: dates read by camera scanning may be misread. Always check scanned dates against the original document or product before relying on them. Days Until does not tell you whether food or medicine is safe to use: follow the label, and ask a pharmacist about medicines. Renewal reminders do not replace official notices from the issuing authority.
• MultiTimer, Days Until and other reminder features: notifications and alarms depend on your device's settings, battery optimisation and operating system, and may be delayed or blocked. Do not rely on them where a missed alert could cause harm, loss or a safety risk.
• Rhythm Trainer: scores are a practice aid and depend on your device and audio latency. Keep the volume at a comfortable level, especially when using headphones, to protect your hearing.
• Trivia Showtime: the questions are based on the Open Trivia Database, a third-party community source, and are built into the Application. We aim for accurate questions and answers but cannot guarantee that all quiz content is complete, current, appropriate or error-free. Please report a wrong question from the Application or to support@mintwavestudio.com.
• Steady Hand: it is for entertainment and personal curiosity only. It is not a medical device and does not measure, diagnose or treat tremor or any other health condition, and its breathing guide is not therapy. If you are worried about your health, see a doctor. Scores depend on your phone's motion sensor and are not comparable between devices.
• ZeroMargin: results depend on your device's screen and touch response and are not comparable between devices.
• Steady Hand, Shadow Match, ZeroMargin, Trivia Showtime and other games: take regular breaks. Stop playing if you feel discomfort or strain. When playing party or duel modes, pass the phone carefully.

Third-party services

The Applications rely on third-party services, including Google Play, the Apple App Store, Google AdMob (in Android Applications with ads), Google Firebase, RevenueCat (in Hatch Day, Cable Calc, Trivia Showtime and other Applications that use it for purchases) and the Open Trivia Database (the source of the Trivia Showtime questions). Your use of those services is also subject to their own terms and privacy policies. We are not responsible for third-party services, their availability or their content.

Apple App Store users

If you downloaded an Application from the Apple App Store, the following also applies: these Terms are between you and MintWave Studio only, not Apple; Apple has no obligation to provide maintenance or support for the Application; if the Application fails to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price (if any), and to the maximum extent permitted by law Apple has no other warranty obligation; Apple is not responsible for addressing any claims relating to the Application, including product liability, legal or regulatory compliance, consumer protection or intellectual property claims; you confirm that you are not located in a country subject to a U.S. Government embargo and are not on any U.S. Government list of prohibited or restricted parties; and Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you. Where these Terms are silent, Apple's Standard Licensed Application End User License Agreement applies.

Internet connection and device

Most features work offline. Some features (such as ads, purchases, restoring purchases and analytics) need an internet connection. Your mobile network operator's charges for data use, including roaming, are your responsibility. If you are not the bill payer for the device, you confirm that you have the bill payer's permission. We recommend not using the Applications on jailbroken or rooted devices, which can compromise security and stop the Applications from working correctly.

Updates and availability

We may update the Applications to add features, fix problems or meet new requirements of the operating system or the stores. Some updates may be needed for an Application to keep working, and we may stop supporting older versions or operating systems. We may also discontinue an Application at any time. If we do, the rules in "Changes to Pro" above apply to paid features.

Termination

You may stop using an Application at any time by uninstalling it (and cancelling any subscription in the store). We may suspend or end your right to use an Application if you materially breach these Terms, for example by tampering with paid features, and, where the breach can be fixed, we will first give you notice and a reasonable opportunity of at least 14 days to fix it, unless immediate action is required by law or to prevent harm. When your right to use an Application ends, you must stop using it and delete it from your devices. Sections that by their nature should continue (such as intellectual property, limitation of liability and governing law) survive termination.

Disclaimer

The Applications are provided "as is" and "as available". To the fullest extent permitted by law, we do not warrant that the Applications will be uninterrupted, error-free or meet your specific requirements. This does not affect any statutory rights you have as a consumer, including your rights where digital content or a digital service is faulty or not as described.

Limitation of liability

To the fullest extent permitted by law, we are not liable for any indirect, incidental, special, consequential or punitive damages, or for loss of profits, revenue, data or business, arising from your use of, or inability to use, the Applications.

Our total liability for any claim relating to the Applications is limited to the greater of (a) the amount you paid us for the Application concerned in the 12 months before the claim, and (b) the minimum amount that applicable law does not allow us to exclude.

Nothing in these Terms excludes or limits our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for any other liability that cannot be excluded or limited by law, and nothing in these Terms limits any rights you have under mandatory consumer protection laws.

Indemnification

To the extent permitted by law, you agree to indemnify MintWave Studio against claims, losses and reasonable costs arising directly from your breach of these Terms or your intentional misuse of the Applications. This does not apply to the extent a claim is caused by our own negligence or breach, and it does not apply to consumers in jurisdictions where such indemnities are not permitted.

Governing law and disputes

These Terms are governed by the laws of the country in which MintWave Studio is established, excluding its conflict of law rules. If you are a consumer, you also benefit from any mandatory provisions of the law of the country where you live, and you may bring proceedings in the courts of that country. Before starting any formal dispute, please contact us at support@mintwavestudio.com so we can try to resolve the issue informally.

Digital Services Act (EU)

The Applications do not host or publish content uploaded by users for other users. For any questions under the EU Digital Services Act (Regulation (EU) 2022/2065), including reports of allegedly illegal content in an Application, our single point of contact for users and authorities is support@mintwavestudio.com. We communicate in English.

Severability and entire agreement

If any provision of these Terms is found to be invalid or unenforceable, it will be limited to the minimum extent necessary, and the remaining provisions will remain in full effect. These Terms, together with the Privacy Policy and the applicable store terms, are the entire agreement between you and us about the Applications and replace any earlier versions.

Changes to these Terms

We may update these Terms from time to time, for example when we add features or Applications, or when the law changes. We will post the updated Terms on this page with a new effective date and, for material changes, give additional notice where required by law. Changes do not apply retroactively. Previous versions are available on request.

Contact us

If you have any questions about these Terms, please contact MintWave Studio at support@mintwavestudio.com.