Privacy Policy

1Who we are

Basswright (“the app”) is a loudspeaker enclosure design tool for Android. You enter the parameters of a driver, choose a box type, and the app calculates frequency response, cone excursion, port air speed, box and panel dimensions on your phone. It is developed and published by Zydeno (“we”, “us”, “the developer”), an independent developer. For anything related to privacy, write to support@zydeno.com. More about us: zydeno.com.

2Scope of this policy

This policy covers the Basswright Android app distributed through Google Play. It explains what the app stores, what it can hand over and when. It does not cover Google Play and Android themselves, or the apps and services you choose to save a file to or open a file with (a cloud drive, a file manager, a PDF viewer). Those are governed by their own policies; for Google see the Google Privacy Policy.

Our Terms of Use describe the rules for using the app.

3What the developer does not collect

Basswright has no backend of ours and no internet access at all (see §5). The developer does not receive or store any personal data about you through the app. The only exception is an e-mail you choose to send us yourself (see §5). In particular, the app:

• has no account, sign-in, e-mail or phone-number field;
• never connects to a Zydeno server. The privacy and terms pages open in your browser; the app itself does not contact zydeno.com;
• contains no advertising, analytics, attribution or crash-reporting SDKs. The app has no ads and no analytics;
• does not use the Android advertising ID (the permission is removed from the app) and does not create any device or user identifier;
• does not track you across other apps or websites;
• does not use your microphone, camera, contacts or location, and does not read your photos or files on its own. It has no measurement, recording or sound-generating feature;
• does not sell, rent or share personal information with anyone.

4Data on your device

Everything you create in Basswright lives in the app’s private storage on your phone:

• Projects: project names, the box variants you compare, amplifier and input settings, dimensions, materials and thicknesses, and the results the app calculates from them;
• Drivers: the Thiele–Small parameters and names you type, import or save to your driver library. The example drivers in the app are made up and are not manufacturer data;
• Settings: units, number format, app language, theme, paper size, haptics, PDF options (including the workshop or author name, if you enter one) and similar preferences;
• An undo copy: after you import a data backup, the app keeps the previous state of its data in a file in private storage so you can undo the import. It is removed when you undo, import again or use “Delete all data”.

To choose sensible defaults, the app reads the country code of your SIM card and mobile network (if any) and your phone’s region setting, and uses it on the phone only to preselect measurement units and paper size. This needs no permission, nothing is sent anywhere, and you can change every unit in Settings.

Basswright opts out of Android cloud backup and device-to-device transfer, so its data is not copied to your Google account or to a new phone automatically. To move your data to another phone, use the data export and import described in §7.

Haptic (vibration) feedback uses the phone’s standard touch feedback. It needs no permission and collects nothing; you can switch it off in Settings.

5No internet access

Basswright does not use the internet. The app removes the Android INTERNET permission and the network-state permission from its manifest, so it technically cannot send data over a network. It requests no Android permissions for storage, camera, location, contacts or microphone either. All calculations, the font, the text and every other resource are bundled in the app and run on your phone.

A few things can still open outside the app, only when you tap them:

• the links to this Privacy Policy and the Terms of Use open in your web browser;
• “Support” opens your e-mail app with a new message addressed to support@zydeno.com and the app name as the subject. Nothing else is filled in and nothing is attached: no project, driver, settings or device information. The app has no automatic error-report feature. You write the message and it is sent only if you send it yourself.

From the moment your browser or e-mail app takes over, that app, not Basswright, handles the connection.

6Files, imports and paste

Basswright hands a file to Android only after you tap an export action, and reads a file only after you pick it:

• Export: a PDF project sheet, a CSV cut list, a project or driver JSON file, or a full data backup is written to the place you choose in Android’s system “save as” picker. The app does not need, and does not have, storage permission. The PDF contains what is in your project: dimensions, parameters, results, cut list, the author name if you set one, and a calculation disclaimer;
• Import: importing a project file, a driver file or a data backup reads only the one file you select in the system file picker. Importing a data backup replaces the current data; the previous state is kept as an undo copy (see §4).
• Paste specs: on the driver screen, the paste sheet reads the clipboard when it opens, to pre-fill its text field if the clipboard looks like a driver spec sheet. Android 12 and later may show a notice when an app reads the clipboard. The text is used only to fill in the driver parameters you are editing and is not stored apart from the values you apply.

The system file picker may offer storage locations provided by other apps, for example a cloud drive. If you save a file there, that app’s own privacy policy applies to it. Once a file leaves the app, we cannot see or control it. Files you export carry whatever you put into the project, so think about who receives them.

7Backup and deletion

• Export data (Settings → Your data) saves all projects, drivers and settings in one file you keep yourself; Import data restores it on this or another phone.
• Delete one project or driver inside the app at any time.
• Delete all data in Settings removes all projects, library drivers, the undo copy and the app’s cache, and resets the settings. The app offers to export a copy first. Deleted data cannot be recovered by us, because we never had a copy.
• Uninstalling the app removes its data from your phone. Files you exported yourself are not part of the app and stay where you saved them. Delete those separately.

8Legal bases for processing

Where the EU or UK GDPR, or a similar law such as the Swiss FADP or Brazil’s LGPD, applies, these are the legal bases for the limited processing described in this policy:

The app makes no automated decisions that have legal or similarly significant effects on you, does not build a profile of you and does not process special categories of personal data.

9Retention

Data in the app stays on your device until you delete it or remove the app. We keep nothing from the app, because we receive nothing from it. If you e-mail us, we keep your message only as long as needed to answer it and fix the problem, and you can ask us to delete it at any time.

10Your privacy rights

Privacy laws in many countries give you rights over your personal data. Because Basswright keeps your data on your phone and the developer does not receive it, most of these rights are in your own hands: you can view, correct, export and delete everything in the app (§7) and withdraw permissions in Android Settings. For data you have sent us, such as e-mails, write to support@zydeno.com.

EU and UK representative. The individual developer does not process personal data of people in the EU/EEA or the UK except occasional e-mails you choose to send to support. This occasional processing does not involve large-scale processing of special-category or criminal-offence data and is unlikely to result in a risk to your rights and freedoms. Under Article 27(2)(a) GDPR and Article 27(2)(a) UK GDPR, it does not require an EU or UK representative, so none is appointed. Contact us directly at support@zydeno.com; you can also complain to your local supervisory authority.

Rights by region. A summary; the law where you live decides the details.

• European Union, EEA, United Kingdom and Switzerland (GDPR, UK GDPR, Swiss FADP): access, rectification, erasure, restriction of processing, data portability, objection to processing based on legitimate interests, withdrawal of consent at any time, and complaint to a supervisory authority, for example in the country where you live or work (in the UK, the Information Commissioner’s Office).
• United States (California CCPA as amended by the CPRA, and the comprehensive privacy laws of other states such as Virginia, Colorado, Connecticut, Texas and Oregon): to know and access, delete, correct and port personal information; to opt out of its sale or sharing, of targeted advertising and of profiling; to limit the use of sensitive personal information; to appeal a refusal; to use an authorised agent; and not to be discriminated against for using these rights. Notice for California residents: in the last 12 months the developer has not collected personal information through the app, other than e-mails you chose to send us. We have not sold or shared personal information, and we do not use sensitive personal information. Global Privacy Control signals are honoured where the law requires; today there is nothing to opt out of.
• Canada (PIPEDA and provincial laws, including Québec’s Law 25): access, correction and withdrawal of consent; complaints to the Office of the Privacy Commissioner of Canada or, in Québec, the Commission d’accès à l’information.
• Brazil (LGPD): confirmation of processing, access, correction, anonymisation, blocking or deletion, portability, information about sharing and revocation of consent; complaints to the ANPD.
• Japan (APPI): disclosure, correction, suspension of use or deletion; complaints to the Personal Information Protection Commission.
• South Korea (PIPA): access, correction, deletion, suspension of processing and withdrawal of consent; complaints to the Personal Information Protection Commission or the KISA privacy centre. The person responsible for personal information is the developer, reachable at support@zydeno.com.
• Australia and New Zealand (Privacy Act 1988, Privacy Act 2020): access and correction; complaints to the OAIC or the New Zealand Privacy Commissioner.
• Other countries (for example India’s DPDP Act, Singapore’s PDPA, South Africa’s POPIA or Türkiye’s KVKK): the rights your local law gives you. Write to us and we will respond in line with it.

How we respond. We answer within one month, or sooner or later where your local law sets another period (for example 45 days under the CCPA), and we may extend it where the law allows. We may ask for information to confirm that a request comes from you. Requests are free unless they are manifestly unfounded or excessive. If we cannot do what you ask, we explain why and how you can appeal or complain.

11International users

Basswright is available in many countries. The developer does not receive the data you keep in the app, so we do not transfer it anywhere.

If you e-mail us, your message is processed by our e-mail provider and may be stored on servers outside your country. Where the GDPR or UK GDPR applies to such a transfer, it relies on an adequacy decision, on standard contractual clauses offered by the provider, or on the transfer being necessary to answer your request.

This policy is written in English. If a translation is offered, the English version prevails unless your local law requires otherwise.

12Security

Your data is kept in the app’s private storage, which other apps cannot read on an unmodified Android device, and it is protected by your phone’s own lock screen and device encryption. Basswright has no network access, so there is no connection that could be intercepted. Exported files are as safe as the place you put them. Protect your phone with a screen lock and keep your OS up to date.

13Ads, purchases and future versions

Today. The current version of Basswright is free of charge, shows no ads, has no in-app purchases or subscriptions, and contains no advertising, analytics or payment SDKs. This describes the app as it is now, not a promise about future versions. Future versions may introduce advertising, paid features, in-app purchases or subscriptions, or other optional services.

If ads are introduced. Ads would be supplied by a third-party ad network, for example Google AdMob. Ad networks typically process your device’s advertising ID, IP address, approximate location derived from the IP address, device and app information and your interactions with ads, in order to show ads, limit repetition, measure performance and prevent fraud, and, only where you allow it, to personalise ads. Ads would also require the app to connect to the internet, which the current version cannot do.

If purchases or subscriptions are introduced. They would be processed by Google Play’s billing system. Google handles your payment details under the Google Privacy Policy. We would receive only what is needed to deliver and verify a purchase, such as a purchase token, the product, its status, the country and the currency, never your full card or bank details.

Before any such change we will update this policy with a new effective date and version, describing what data is processed, by whom, why and how you can control it; update the Google Play Data safety section; mention the change in the release notes; ask for your consent where the law requires it (for example for personalised ads and non-essential access to your device in the EEA, the UK and Switzerland, through a consent tool that meets Google’s requirements); and offer the opt-outs the law requires (for example under US state privacy laws). The change applies only from the app version that introduces it. Data already stored in the app will not be used for advertising without telling you first and, where required, getting your consent. We will not knowingly show personalised ads to children (§14).

14Children

Basswright is a general audio and DIY design tool. It is not directed to children under 13 and we do not knowingly collect any information from children. In fact the app collects no information from anyone. If you are under the age of majority where you live, use the app with the involvement of a parent or guardian, and never use power tools without adult supervision.

15Changes to this policy

We may update this policy when we change the app (including any change described in §13), when the services the app uses change, or when the law changes. The effective date and version at the top of this page show which version applies, and the version history (§16) summarises every change.

For a material change, for example new data leaving your device, ads or purchases, we update this page and the Google Play Data safety section before the app version with that change is published, describe it in the release notes, and ask for your consent in the app where the law requires it. Changes do not apply retroactively to data processed before them. Earlier versions are available on request from support@zydeno.com.

16Version history

17Contact

• Developer (controller): Zydeno, the developer of Basswright on Google Play
• E-mail for privacy questions and requests: support@zydeno.com
• Website: zydeno.com

We aim to answer within 30 days. If you are not satisfied with our answer, you can contact your local data-protection authority.

See also the Terms of Use.