Privacy Policy

01Who we are

KeyRush (“the app”, “we”, “us”, “our”) is an iOS application published by Andrii Matiushev, publishing as “Zydeno” (“the developer”), the data controller responsible for this app. You can reach us any time at [email protected] or via zydeno.com.

Developer / data controller: Andrii Matiushev, independent developer publishing as “Zydeno”. For privacy questions, the fastest route is email.

02Scope of this policy

This policy explains how the KeyRush iPhone & iPad app and its Home Screen / Lock Screen widgets handle information. It does not cover Apple’s services (the App Store and StoreKit purchasing), which are governed by Apple’s Privacy Policy, or the Apple App Store itself. KeyRush does not integrate any other third-party service (see §6).

03What we do not collect

Because KeyRush has no backend of its own, the developer collects no personal data about you. Specifically, we do not:

• require or offer an account, login, email, or phone number;
• run any KeyRush server that receives, logs, or stores your data;
• embed advertising, analytics, attribution, or crash-reporting SDKs;
• assign you an advertising identifier, device fingerprint, or tracking ID;
• track you across other apps or websites (so iOS App Tracking Transparency is not used);
• record audio — the typing sounds are generated (synthesized) on your device and the microphone is never used;
• read your keyboard input outside the app, or act as a system keyboard — you type inside KeyRush only;
• receive your name, address, or payment details when you buy KeyRush Pro — all payments are processed by Apple (see §7);
• sell, rent, or share your personal information with data brokers — there is nothing for us to sell.

04Data stored on your device

Everything you create lives only on your device (using Apple’s on-device SwiftData store and standard app preferences / UserDefaults). There is no cloud sync and no developer server (§5), and it is never sent to us. This includes:

• Typing sessions & results — your words-per-minute (WPM), accuracy, characters typed, errors, duration, mode (Test, Lessons, Race), and the date of each attempt;
• Per-key & typing-pattern statistics — which keys and character combinations (bigrams/trigrams, or “trouble spots”) you tend to miss, your per-key heatmap, per-finger accuracy, consistency, and “weak keys” used to build practice drills;
• Lesson progress — which lesson stages you’ve completed, per keyboard layout (e.g. Latin, Cyrillic, Greek, Hebrew, Arabic, Devanagari, Thai, Korean, Zhuyin);
• Race results — your outcomes against the built-in offline computer opponents;
• Streaks & daily challenge — your practice streak, streak-freeze count, and daily-challenge history;
• Goals — any WPM goal you set;
• Custom text — any text you type or paste in to practice with (Pro), kept only to run that practice;
• Certificate name — an optional display name you enter for a typing certificate;
• Settings — theme, sound pack, haptics, typing/keyboard language, app (UI) language, units & temperature preference, and other preferences;
• a local “Pro is active” flag (see §7).

You stay in control: you can reset or delete your data in the app, export it (§11), and deleting the app removes its local copy.

05Storage & device transfer (no cloud sync)

Your data is stored only on your device. There is no cloud sync and no developer cloud. Moving to a new device is something you control:

• Encrypted device backup. If you back up your iPhone or iPad, your KeyRush data is included in your standard encrypted device backup (iCloud Backup or a Finder/computer backup). Those backups are governed by your own Apple backup settings, not by us, and are not something the developer can access.
• Your own exports. You can generate a certificate (image / PDF) or a CSV of your statistics and save or share it wherever you like via the iOS share sheet (see §11). The file is yours — handle it as you would any personal record.
• No cross-device account. Because there is no sync service, your devices do not share KeyRush data automatically, and there is nothing on our side to lose, leak, or hand over.

06Network use & data sent to third parties

KeyRush is designed to work entirely offline. The app itself makes no network requests to any KeyRush server or third-party service in order to function — practice text, lessons, races, sounds, statistics and analysis are all bundled or computed on your device.

If a future version adds an optional online feature (for example an online leaderboard or account sync), we will describe exactly what is sent, to whom, and why — and update this policy and the App Store privacy label — before that feature ships (see §3).

07Purchases & subscriptions (KeyRush Pro)

KeyRush offers an optional paid upgrade, KeyRush Pro — an auto-renewing subscription (monthly or yearly, which may start with a free trial) or a one-time “Lifetime” purchase. Pro changes nothing about the app’s zero-collection design:

• Apple processes the payment. Purchases are made through your Apple Account under Apple’s Media Services Terms & Conditions. We never receive your name, email, billing address, or payment-card details. Apple’s handling of this data is described in Apple’s Privacy Policy.
• The app only verifies your entitlement. Using Apple’s on-device StoreKit framework, the app receives a signed, pseudonymous transaction record (the product purchased, a transaction identifier, purchase/expiry dates, and trial/refund status) that contains no contact or payment information. It is used solely to unlock Pro features and show your plan in Settings, and it is processed and cached on your device (including in a private App Group container so the widget can reflect your Pro status) — we run no server it could be sent to.
• “Restore Purchases” simply asks the App Store (Apple) to re-check your entitlement for your Apple Account on the current device.
• Sales reports are aggregate. Apple provides developers with sales statistics that do not identify individual customers.

You can manage or cancel the subscription in your App Store account settings; refunds are requested from Apple. Full billing, renewal, trial and cancellation terms are in the Terms of Use (§13).

08Device permissions

KeyRush is deliberately built to need almost nothing from the system. It does not request access to your location, camera, microphone, photos, contacts, Apple Health, Bluetooth, or motion data, and it does not send push notifications.

Because KeyRush requests no sensitive permissions, there is nothing here to review or revoke beyond deleting the app.

09On-device processing

All of KeyRush’s “intelligence” runs locally on your device. Nothing below is uploaded anywhere:

• WPM, accuracy and consistency calculations for each session;
• your per-key heatmap, per-finger accuracy, and “trouble spots” (bigram/trigram) analysis;
• “Weak key” detection that turns your recent mistakes into a targeted practice drill;
• your typing rank / percentile and the certificate shown from it;
• race pacing against the built-in offline computer opponents;
• streaks, goals, the daily challenge, and widget snapshots;
• PDF certificates and CSV exports, generated on-device for you to share via the standard iOS share sheet at your discretion.

10Widgets & App Group

The Home Screen / Lock Screen widgets display a small on-device snapshot (for example your best WPM, current streak, goal progress, or weak keys). The app saves that snapshot into a private App Group container (group.com.zydeno.keyrush) shared only between KeyRush and its own widget extension on your device. None of it is sent to us or to anyone else.

11Exports & sharing

KeyRush can create files for you: a typing certificate (image or PDF), and a CSV export of your statistics (Pro). These are generated on your device and are handed to the standard iOS share sheet only when you tap to share or save them. What happens next — saving to Files, AirDrop, Messages, email, a social app — is your choice and is governed by the destination you pick, not by us. We never receive a copy.

12International data transfers

Because the developer collects no personal data and runs no server, there is no transfer of your data by us across any border. Your App Store purchases and any encrypted device backup you choose to keep are handled by Apple under Apple’s own terms and infrastructure. Wherever in the world you use KeyRush, your practice data stays on your device.

13Legal bases for processing (GDPR / UK GDPR)

For users in the European Economic Area, the United Kingdom and similar jurisdictions: the developer does not collect or process your personal data on any server. To the extent any limited, on-device handling could be considered processing, the bases are —

• Performance of a contract — to verify your App Store purchase on-device and unlock KeyRush Pro, using only the pseudonymous transaction record described in §7;
• Legitimate interests / your request — to provide the core, on-device features you ask for (saving your progress, computing your stats, generating an export), in a way that keeps everything on your device;
• Consent — for anything the operating system gates behind a prompt (should a future version introduce one), which you can grant or withdraw in iOS Settings.

Wherever you live, the position is the same: because the developer collects no personal data in any country, the app meets the data-minimization requirements of comparable privacy laws worldwide in the same way.

14Your privacy rights

Depending on where you live, you may have rights to access, correct, delete, port, or restrict the processing of your personal data, and to object or withdraw consent (GDPR / UK GDPR), or to know, delete, correct and opt out of “sale”/“sharing” (CCPA/CPRA and similar US state laws). The same applies under comparable privacy laws worldwide — for example Brazil’s LGPD, Canada’s PIPEDA and Québec’s Law 25, the Australian Privacy Act, Japan’s APPI, South Korea’s PIPA, India’s DPDP Act, China’s PIPL, South Africa’s POPIA, Switzerland’s FADP and others.

Because all your KeyRush data is held only on your device — and we hold nothing about you — you can exercise these rights yourself, directly: view and edit your data, reset or delete any of it in the app, export it (§11), or remove everything by deleting the app. We have no copy to access, export, or erase on our side. If you have questions or believe we can help, contact [email protected]. You also have the right to lodge a complaint with your local data-protection authority.

“Sale” / “sharing” of personal information: The current version does not sell or share your personal information, and we have not done so in the preceding 12 months. We don’t promise this will never change — see §3 regarding possible future ad-supported or online versions, which would be disclosed here first.

15Data retention & deletion

We retain nothing, because we receive nothing. Data you create is kept on your device until you delete it. To erase everything:

• reset or delete your data using the in-app tools;
• remove KeyRush from your device — this deletes its local store and its local “Pro is active” flag;
• if you keep encrypted device backups, a copy may remain in them until those backups rotate — that is governed by your own Apple backup settings, not by us.

If you purchased KeyRush Pro, the record of that purchase belongs to your Apple Account and is created and retained by Apple under Apple’s own privacy policy (that is also what lets you restore purchases after reinstalling).

16Security

Your data benefits from iOS’s built-in app sandboxing and device encryption, and can be further protected with your device passcode, Face ID, or Touch ID at the system level. Because KeyRush keeps everything on your device and transmits nothing to us, the attack surface is minimal — there is no account to breach and no server to compromise. No method of storage is 100% secure, but not collecting or transmitting your data is our primary safeguard.

17Children’s privacy

KeyRush is a general-audience typing app rated suitable for ages 4 and up, and it is safe for learners of all ages, including children practicing typing. It does not knowingly collect personal information from anyone, including children under 13 (or the higher minimum age in your country, e.g. 16 in parts of the EEA) — and because the app collects no personal data at all and requires no account, it does not knowingly collect data from children. A parent or guardian may set up and supervise use for a minor, including any purchase (see Terms §2). If you believe a child has provided personal information in a way that concerns you, contact us — though, as noted, we hold no such data.

18Do-Not-Track & no sale of data

The current version of KeyRush does not track users and therefore has nothing to disable in response to a browser/OS “Do Not Track” or Global Privacy Control signal, and it does not sell or share personal information or use it for cross-context behavioral advertising. If a future version introduces advertising or analytics, we will honor applicable opt-out signals and update this policy first (see §3).

This webpage itself sets no cookies and loads no analytics, third-party fonts, or trackers — it is a static page describing the app.

19Disclaimer & use at your own risk

This privacy notice describes how information is handled; it is not a warranty about the app’s accuracy, availability, or fitness for any purpose. The full legal terms — including the “as is” disclaimer, the removal of liability for bugs, data loss and financial risk, and the limitation of liability — are set out in the Terms of Use, which govern your use of the app together with this policy.

20Changes to this policy

We may update this Privacy Policy to reflect changes to the app or the law. When we do, we will revise the “Last updated” date at the top and, for material changes, highlight them in the app or on this page. Your continued use of KeyRush after an update means you accept the revised policy.

21Contact us

Questions, requests, or concerns about privacy? We’re happy to help.

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