Terms of Use

01Acceptance of these terms

These Terms of Use (also referred to as the “Terms of Service”) (“Terms”) form a binding agreement between you (“you”, “the user”) and Andrii Matiushev, the independent developer publishing as “Zydeno” (“Zydeno”, “we”, “us”, “our”), the developer of the KeyRush application, including its Home Screen / Lock Screen widgets (together, “the app”). By downloading, installing, accessing, or using the app, you confirm that you have read, understood, and agree to be bound by these Terms and by our Privacy Policy. If you do not agree, do not use the app.

02Eligibility & age

You must be legally able to enter into this agreement in your jurisdiction. KeyRush is a general-audience app suitable for all ages; if you are a minor, you may use it only with the involvement and consent of a parent or legal guardian, who agrees to these Terms on your behalf. Purchases (including KeyRush Pro) may only be made by someone with the legal capacity to do so, or with parental consent — for example via Apple’s Ask to Buy / Family Sharing controls. By using the app you represent that you meet these requirements.

03What KeyRush is

KeyRush is a typing speed trainer and touch-typing tutor for iPhone and iPad, for practice, learning, and entertainment. It lets you:

• take a typing test that measures your words-per-minute (WPM) and accuracy across different durations (including a longer endurance test in Pro), using different text styles;
• work through a structured lesson course (multiple stages, for several keyboard layouts and scripts) to build touch-typing skill;
• race against built-in, offline computer opponents at various difficulty levels;
• practice from a range of text packs / styles (such as random words, quotes, pangrams and tongue twisters, plus additional packs in Pro), enter your own custom text, or run a “weak keys” drill generated from your recent mistakes (Pro);
• review statistics — WPM & accuracy history, a per-key heatmap, per-finger accuracy, consistency, and “trouble spots”, with longer history ranges in Pro;
• set a WPM goal, keep a streak, play a daily challenge, generate a shareable typing certificate (image or PDF) and, in Pro, a CSV export of your stats;
• personalize the experience with themes, optional typing sounds and haptics, multiple app and typing languages, and use Home Screen / Lock Screen widgets.

The app is free to download and its core features are free to use, with no accounts and no KeyRush servers; your data is stored only on your device, with no cloud sync (see Privacy Policy). An optional paid upgrade, KeyRush Pro, unlocks additional features — see §13 for purchase, billing, renewal and cancellation terms.

04License to use the app

Subject to your compliance with these Terms, Zydeno grants you a personal, limited, non-exclusive, non-transferable, non-sublicensable, revocable license to download and use one copy of the app on Apple-branded devices that you own or control, for your personal, non-commercial use, as permitted by the App Store Licensed Application End User License Agreement (“Standard EULA”). These Terms supplement, and where permitted prevail over, the Standard EULA. You may not copy, modify, reverse-engineer, decompile, distribute, sell, rent, or create derivative works of the app except to the extent this restriction is prohibited by applicable law.

05Not a certified test — provided “as is”

• Metrics are estimates. Results depend on the device, keyboard, text, settings, and how measurements are computed, and can vary from session to session and from other tools.
• Certificates are for motivation. A KeyRush certificate is a personal, novelty/motivational document — it is not a professional credential, and no representation is made that any third party will accept or recognize it.
• Do not rely on it for consequential decisions. You should not rely on KeyRush results for employment, hiring, examination, academic, competition, or any other decision that matters to you or others. Verify with an appropriate independent method where that matters.

You acknowledge and agree that any reliance on the app’s scores, content, or information is solely at your own risk (see §16).

06Practice content & text packs

KeyRush includes built-in practice text — such as random words, quotes, pangrams, tongue twisters, facts, and other packs — chosen for typing practice. This material is provided for general practice “as is”, may be simplified, paraphrased, or excerpted, may contain inaccuracies, and is not presented as factual, professional, or educational reference material. Any quotations or short excerpts are used for typing practice only; the underlying words remain the property of their original authors, and their inclusion does not imply any endorsement. If you believe any content is used improperly, contact [email protected] and we will review it.

07Accuracy, bugs & no guaranteed results

• Bugs & errors happen. Software can contain bugs and may crash, freeze, miscalculate, display wrong numbers, or behave unexpectedly. To the maximum extent permitted by law, this is not the developer’s fault or responsibility, and the app is submitted and offered in the form in which it currently exists.
• Data may be lost. Because your data lives only on your device (there is no cloud backup on our side), it can be lost if the app is deleted, the device is lost, reset, or damaged, or a bug or update affects local storage. You are responsible for your own backups (§8). To the maximum extent permitted by law, the developer is not liable for any loss of data.
• No guaranteed outcome. The developer does not promise that using KeyRush will improve your typing speed, accuracy, skill, or any other result. Progress depends on many factors outside our control.
• Availability is not guaranteed. The app, or any feature, may be changed, limited, suspended, or discontinued at any time (§17).

08Your responsibilities

You are solely responsible for: how you use the app and how you interpret and act on its scores and information; keeping your device secure; maintaining your own backups of anything important (for example via your encrypted device backup or an export you generate); the content of any custom text you enter; and complying with these Terms and applicable law. You use the app at your own risk and remain responsible for all decisions you make.

09Acceptable use & custom text

You agree not to: use the app for any unlawful purpose or in violation of any applicable law; interfere with, disrupt, or attempt to gain unauthorized access to the app or its systems; reverse-engineer, decompile, or tamper with the app except where the law permits; remove or obscure any proprietary notices; or use the app in any way that could harm, disable, or impair it or interfere with another party’s use.

Custom text. The custom-text feature lets you practice with text you supply. You are solely responsible for that text and confirm you have the right to use it. Do not enter another person’s confidential information, or content that is unlawful or infringes anyone’s rights. Custom text stays on your device and is not sent to us (see Privacy Policy).

10Your content & privacy

Content and data you create in the app — typing results, statistics, goals, custom text, settings — is yours and is stored only on your device (there is no cloud sync). Zydeno does not collect, access, host, or back it up, and claims no ownership or rights over it. You are responsible for it and for any backups. Our handling of information is described in the Privacy Policy, which is incorporated into these Terms by reference.

Feedback. If you send us feedback, ideas, bug reports, or suggestions (for example by email), you agree that we may use them freely, for any purpose, without any obligation, restriction, attribution, or compensation to you, and you grant us a perpetual, worldwide, royalty-free license to do so. Please do not send us any confidential information you do not want us to use.

11Intellectual property

The app, including its software, design, visual identity, the KeyRush name and logo, its lesson structure, curated text, and other original content, is owned by Zydeno and protected by intellectual-property laws. Except for the license in §4, no rights are granted to you. Third-party names, brands, and trademarks (including Apple) belong to their respective owners and are used for identification only; their use does not imply any endorsement or affiliation.

Copyright & IP complaints. We respect intellectual-property rights. If you believe any content in the app infringes your copyright or other rights, email [email protected] with enough detail to identify the content and your rights, and we will review it and, where appropriate, remove or change it.

12Third-party services

KeyRush relies on Apple services — the App Store, and StoreKit for purchases. Your use of those services is governed by Apple’s own terms and privacy policy. We do not control Apple’s services and are not responsible for their availability, accuracy, or practices. The app does not integrate any other third-party service for its core operation.

13Purchases, subscriptions & advertising

13.1 Free core & KeyRush Pro

KeyRush is free to download, and its core features are free to use — including the typing test at standard durations, the first lesson stages, races against a computer opponent at the introductory difficulties, the core text styles, your recent statistics, streaks, goals, the daily challenge, a typing certificate, standard themes and sounds, and the standard widget. An optional premium upgrade, KeyRush Pro (“Pro”), unlocks additional features — for example additional text packs, the later lesson stages, extra race difficulties and opponents, custom-text practice and the “weak keys” drill, longer statistics history with the per-key heatmap and advanced analytics, the longer endurance test, extra themes and sounds, CSV export, and a richer widget. The exact set of Pro features is shown in the app and may change over time; we may also change which features are free and which require Pro, and we do not promise that any particular feature will remain free or remain in Pro. Pro is offered as:

• KeyRush Pro — Monthly: an auto-renewable subscription with a 1-month billing period;
• KeyRush Pro — Yearly: an auto-renewable subscription with a 1-year billing period;
• KeyRush Pro — Lifetime: a one-time purchase (not a subscription; nothing renews) that unlocks Pro for the Apple Account that bought it (see §13.6).

The current price of each option, the billing period, and any free-trial length are always displayed in the app and on the App Store, in your local currency, before you confirm a purchase. Prices are set through the App Store and may vary by country/region, plan, and over time, and may include applicable taxes.

13.2 Billing & automatic renewal

• All purchases are made through Apple and are charged to your Apple Account at confirmation of purchase (or, where a free trial is offered, at the end of the trial period).
• Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. Your Apple Account is charged for the renewal, at the then-current price, within 24 hours prior to the end of the current period.
• You can manage or cancel your subscription, and turn off auto-renewal, at any time in your App Store account settings (Settings → [your name] → Subscriptions on your device) or via the “Manage subscription” link in the app’s Settings. Deleting the app does not cancel a subscription.
• If you cancel, your subscription stays active until the end of the period you have already paid for; the remaining period is not refunded, except where required by law or granted by Apple (§13.5).

13.3 Free trial

A subscription may include an introductory free trial (for example, 7 days), as shown on the purchase screen. You are not charged during the trial; the trial converts automatically into a paid subscription at the price shown unless you cancel auto-renewal at least 24 hours before the trial ends. Any unused portion of a free trial is forfeited when you purchase a subscription or the Lifetime unlock. Eligibility for introductory offers (typically one per Apple Account) is determined by Apple.

13.4 Price changes

We may change prices for new purchases at any time, and prices may differ between regions. If the price of your existing subscription increases, Apple will notify you in advance and, where required, ask for your consent before the new price applies; if you do not agree, you can cancel before the next renewal and keep access until the paid period ends.

13.5 Refunds & restoring purchases

Purchases are processed by Apple, and refunds are handled by Apple under the Apple Media Services Terms — we cannot issue refunds ourselves. To request a refund, use reportaproblem.apple.com or your App Store purchase history. Your statutory consumer rights — for example, the 14-day withdrawal right for digital content in the EU/UK, and equivalent refund or cooling-off rights in other countries — are unaffected and are exercised through Apple. If you reinstall the app or switch devices, tap “Restore Purchases” in the app to re-activate Pro on the same Apple Account free of charge.

13.6 About the “Lifetime” purchase

The Lifetime option is a one-time, non-consumable purchase tied to your Apple Account. “Lifetime” means for the lifetime of the KeyRush app as offered by the developer; it is not a promise that the app, any particular feature, or any future feature will remain available indefinitely. If the app is discontinued, or a feature is changed or removed, §17 (changes & termination) and §14–§15 apply. It does not include any separate or future paid app that we may publish.

13.7 Changes to Pro & availability

The specific features included in Pro may change as the app evolves, and §17 applies to paid features as well. We are under no obligation to provide updates, new features, or continued availability. If the app fails to conform to an applicable warranty, you may notify Apple for a refund of the purchase price, as described in §18.

13.8 No responsibility for charges or financial loss

To the maximum extent permitted by applicable law, the developer is not responsible or liable for any charge, renewal, non-refunded amount, currency-conversion or tax cost, or other financial loss arising from a purchase, an auto-renewal, a forgotten cancellation, an unauthorized purchase on your device, or any billing issue — these are governed by your agreement with Apple and your device/account settings. Nothing in this section removes any refund or cancellation right that mandatory consumer law gives you.

13.9 Advertising

The app currently contains no advertising. We reserve the right to introduce advertising (which may involve third-party advertising or analytics providers) in future versions. If we do, any new data practices will be reflected in an updated Privacy Policy and App Store privacy label before they take effect.

14Disclaimer of warranties

To the maximum extent permitted by applicable law, the app and all information, scores, and content it provides are offered “AS IS” and “AS AVAILABLE”, without warranties of any kind, whether express, implied, or statutory, including any implied warranties of merchantability, fitness for a particular purpose, accuracy, non-infringement, and any warranty that the app will be uninterrupted, error-free, secure, or that data or results will be complete, accurate, current, or preserved. You assume the entire risk as to the quality, performance, and results of the app. Some jurisdictions do not allow the exclusion of certain warranties, so some of the above may not apply to you; in that case, such warranties are limited to the minimum scope permitted by law.

Consumers keep their statutory rights. Nothing in these Terms excludes, restricts, or modifies any right or guarantee that mandatory consumer law gives you and that cannot lawfully be waived — for example, the legal guarantee of conformity for digital content and services in the EU and UK, the consumer guarantees under the Australian Consumer Law, and equivalent protections in other countries. Where such rights apply, they prevail over the disclaimers above to the extent of any conflict.

15Limitation of liability

To the maximum extent permitted by applicable law, in no event will Zydeno or its developers, officers, or affiliates be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, revenue, data, goodwill, or opportunity, or for any bug, error, malfunction, downtime, data loss, or financial loss, arising out of or related to your use of (or inability to use) the app, your purchase or subscription, or your reliance on its scores, content, or information — even if advised of the possibility of such damages, and regardless of the legal theory.

To the maximum extent permitted by law, Zydeno’s total aggregate liability for all claims relating to the app will not exceed the greater of (a) the amount you actually paid (through Apple) for the app — including KeyRush Pro subscriptions and purchases — in the 12 months before the claim, or (b) USD $10.

Nothing in these Terms excludes or limits liability that cannot lawfully be excluded or limited — including, where the law so provides, liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, for willful misconduct or gross negligence, or under mandatory product-liability and consumer-protection laws. Some jurisdictions do not allow certain limitations, so some of the above may not apply to you, and you may have additional rights that vary by country.

16Assumption of risk — use at your own risk

You expressly acknowledge and agree that your use of KeyRush is entirely at your own risk, and that the app is provided in the form in which it exists, with all faults. To the maximum extent permitted by applicable law, you assume full responsibility for, and the developer is not at fault for, any result of using the app — including inaccurate or unexpected scores, software bugs or defects, interruptions, incompatibility with your device, loss of data or progress, or any consequence of a decision you make based on the app. If you are not satisfied with the app, or do not agree with these Terms, your sole and exclusive remedy is to stop using it and delete it (and, for any purchase, to seek a refund from Apple under §13.5). This section does not remove any right you have under mandatory consumer law that cannot be waived.

17Indemnification

To the extent permitted by law, you agree to indemnify and hold harmless Zydeno and its developers and affiliates from any claims, damages, losses, liabilities, and expenses (including reasonable legal fees) arising out of your misuse of the app, your custom text or other content, your violation of these Terms, or your violation of any law or the rights of any third party.

18Changes to the app & termination

We may modify, suspend, or discontinue the app or any feature (free or Pro) at any time, with or without notice. These Terms apply until terminated. Your license terminates automatically if you breach them; you may terminate at any time by deleting the app. Sections that by their nature should survive termination (including §§5–7, 10–12, 14–17, and 18–21) will survive.

19Apple-specific terms

These Terms are between you and Zydeno only, not with Apple Inc. (“Apple”). Apple is not responsible for the app or its content. To the extent the app is downloaded from the Apple App Store, the following apply:

1. Scope of license. The license granted to you is limited to a non-transferable license to use the app on Apple-branded products you own or control, as permitted by the Usage Rules in the Apple Media Services Terms and Apple’s Standard EULA.
2. Maintenance & support. Zydeno is solely responsible for any maintenance and support for the app. Apple has no obligation to furnish any maintenance or support services.
3. Warranty. Zydeno is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. If the app fails to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price (if any); to the maximum extent permitted by law, Apple has no other warranty obligation with respect to the app.
4. Product claims. Zydeno, not Apple, is responsible for addressing any claims relating to the app or your use of it, including (i) product-liability claims; (ii) any claim that the app fails to conform to any applicable legal or regulatory requirement; and (iii) claims arising under consumer-protection, privacy, or similar legislation.
5. Intellectual-property claims. Zydeno, not Apple, is responsible for the investigation, defense, settlement, and discharge of any third-party claim that the app or your use of it infringes that third party’s intellectual-property rights.
6. Legal compliance. You represent that you are not located in a country subject to a U.S. Government embargo or designated as “terrorist-supporting,” and that you are not on any U.S. Government list of prohibited or restricted parties.
7. Developer contact. Questions, complaints, or claims about the app should be directed to Zydeno at [email protected].
8. Third-party beneficiary. You acknowledge and agree that Apple and its subsidiaries are third-party beneficiaries of these Terms, and that upon your acceptance Apple will have the right (and is deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary.

20Governing law & disputes

These Terms are governed by the laws of Ukraine, the jurisdiction in which the developer is established, without regard to its conflict-of-laws rules, and you and Zydeno agree to the exclusive jurisdiction of its competent courts, except where mandatory consumer-protection law in your country of residence provides otherwise. If you are a consumer, you retain the benefit of any mandatory provisions of the law of your country of residence, and nothing here deprives you of that protection; if that law gives you the right to bring or defend proceedings in the courts of your country of residence, that right is unaffected. You agree to first attempt to resolve any dispute informally by contacting [email protected].

21General provisions

• Entire agreement. These Terms, together with the Privacy Policy and Apple’s Standard EULA, are the entire agreement between you and Zydeno regarding the app.
• Severability. If any provision is held unenforceable, the rest remains in full force, and the unenforceable part is modified to the minimum extent necessary.
• No waiver. Our failure to enforce any provision is not a waiver of it.
• Assignment. You may not assign these Terms; we may assign them in connection with a merger, acquisition, or transfer of assets.
• Language. These Terms may be provided in translation; if there is a conflict, the English version controls to the extent permitted by law.

22Changes to these terms

We may update these Terms to reflect changes to the app or the law. When we do, we will revise the “Last updated” date above and, where appropriate, note the change in the app or on this page. Your continued use of the app after changes take effect constitutes acceptance of the revised Terms. If you do not agree, stop using the app.

23Contact us

Questions about these Terms?

• Email: [email protected]
• Website: zydeno.com
• Developer: Andrii Matiushev (publishing as Zydeno)