NumbersSolver - Privacy Policy

VERSION: v01
Last Updated: 19th June 2026
Effective Date: 19th June 2026

Overview

This Privacy Policy explains how Themroc Limited ("Themroc", "we", "our") collects, uses, and protects your information when you use our NumbersSolver mobile application ("NumbersSolver", "the app").

NumbersSolver is a number puzzle solver. We have designed it to be as private as possible: no account is required, and no personal information is collected from you by Themroc. The app's only third-party component is Google AdMob, used to display advertisements, which is described in detail below.

Information We Collect

1. Information You Provide

None. NumbersSolver does not require account creation or any personal information from you.

2. App Settings Stored Locally on Your Device

The following preferences are stored only on your device, using Apple's standard UserDefaults storage:

Appearance preference (Light, Dark, or System)
Number of seed numbers (4, 6, or 8)
Maximum solutions setting
Ad-free purchase status (once that feature is available)

This data never leaves your device. Themroc does not operate any server that the app communicates with, and your settings are never transmitted to us or to any third party.

3. Advertising Data Collected by Google AdMob

NumbersSolver is free to use and supported by advertisements served through Google AdMob. AdMob is operated by Google LLC, acting as an independent data processor — Themroc does not receive, see, or store any of the data described in this section.

Depending on the permission you grant (see App Tracking Transparency, below), AdMob may collect:

A device advertising identifier (IDFA), if you allow tracking
IP address and approximate location
Device type, operating system version, and general technical information
Ad interaction data (impressions, clicks)

For full details of what Google collects and how it is used, see Google's own Privacy Policy and AdMob data disclosure.

4. App Tracking Transparency (ATT)

The first time you launch NumbersSolver, iOS will show a system prompt asking whether the app may track your activity across other companies' apps and websites. This is Apple's standard ATT prompt — Themroc has no ability to alter its wording or bypass it.

If you choose "Ask App Not to Track": AdMob will not use your advertising identifier, and you will see only non-personalised, contextual ads.

If you choose "Allow": AdMob may use your advertising identifier to show ads personalised to your interests. You can change this decision at any time in iOS Settings → Privacy & Security → Tracking.

Either way, the app's functionality is identical — your choice only affects whether ads are personalised.

Legal Basis for Processing (UK GDPR)

Themroc Limited does not itself collect or process any personal data through NumbersSolver. Your app settings are stored locally on your device and are never transmitted to us.

Where AdMob processes data (such as the advertising identifier) for personalised advertising, this is done on the basis of your consent, given (or withheld) via the iOS App Tracking Transparency prompt. Where AdMob serves non-personalised, contextual ads, this is done on the basis of Google's own legitimate interest in operating the advertising service that funds the free version of the app.

Data Sharing

We Do Not Share Your Data

Themroc Limited does not sell, rent, or share your personal information with any third party for any purpose. We have no servers and no analytics or crash-reporting tools collecting data on our behalf.

Google AdMob

The only data sharing that occurs is between your device and Google, via the AdMob SDK embedded in the app, for the purpose of serving advertisements. This relationship is between you and Google — Themroc does not have access to the data AdMob collects, and does not control how Google uses it beyond the settings exposed through Apple's ATT framework.

Legal Requirements

We may disclose information if required to do so by law, for example in response to a court order, or where necessary to protect the rights, property, or safety of Themroc Limited, our users, or others. In practice, we hold no personal data capable of being disclosed in this way.

Children's Privacy

NumbersSolver is suitable for all ages and does not knowingly collect personal information from anyone, including children.

No Account Required: Anyone can use the app without providing any personal information.

If you believe a child has had personalised advertising shown to them inappropriately, this can be controlled directly via iOS Screen Time and Privacy settings, which take precedence over individual apps' ATT prompts.

If you have any concerns, please contact us at privacy@themroc.net.

Data Storage and Security

Local Storage

All app settings are stored locally on your device
Data is protected by iOS app sandboxing (other apps cannot access it)
Data is included in your device's encrypted backups, if you have backups enabled
Data is not stored in iCloud

Data Retention

Your app settings remain on your device until you delete the app
Deleting the app removes all local data permanently
Themroc retains no data, as none is sent to us

Your Rights

Under UK GDPR and the Data Protection Act 2018, you have the following rights in relation to your personal data:

Right of access: You can request details of what personal data we hold about you
Right to erasure: You can request deletion of your personal data
Right to object: You can object to processing based on legitimate interest or consent
Right to restrict processing: You can ask us to limit how data is used
Right to data portability: You can request your data in a portable format
Right to rectification: You can ask us to correct inaccurate data

Because Themroc holds no personal data of its own, requests relating to advertising data collected by AdMob should generally be directed to Google, although we are happy to assist or pass on a request on your behalf.

Exercising Your Rights

To exercise any of the above rights, or for help directing a request to Google, contact us at privacy@themroc.net. We will respond within 30 days.

Deleting Your Settings

Because your app settings are stored locally, you can delete them at any time simply by deleting the NumbersSolver app from your device. There is no need to contact us to do this.

Stopping AdMob Entirely

Once available, purchasing the ad-free upgrade within the app will stop AdMob from loading altogether, so no advertising data is collected from your device going forward.

Right to Complain

If you are unhappy with how we have handled your personal data, you have the right to lodge a complaint with the UK Information Commissioner's Office (ICO) at ico.org.uk.

European Economic Area (EEA) Users

If you are located in the EEA, the same rights and protections described above apply to you under the EU GDPR. Google AdMob processes data globally in accordance with its own published safeguards for international data transfers.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time, particularly as new features (such as the ad-free upgrade) are added to the app. Changes will be posted on this page with an updated version number and effective date. Significant changes will also be noted in app update release notes.

Your continued use of NumbersSolver after changes take effect constitutes acceptance of the updated policy.

Contact Information

Data Controller: Themroc Limited
ICO Registration Number: ZC095898
Email: privacy@themroc.net
Website: www.numberssolver.uk
Address: Nymet Rowland, Crediton EX17 6AW, UK

We will respond to privacy enquiries within 30 days.

Summary (Plain English)

What we collect:

Your app settings (appearance, seed count, solution limit) — stored only on your device, never sent to us

If you allow tracking when prompted, Google AdMob collects a device advertising identifier to show personalised ads. If you decline, you'll still see ads, but they won't be personalised

What we don’t do:

We don’t require accounts or personal information

We don’t collect analytics or crash reports ourselves

We don’t sell or share your data — AdMob's data processing is handled directly by Google, not us

Your control:

Choose "Ask App Not to Track" when prompted, or change it later in Settings → Privacy & Security → Tracking

Delete all your settings at any time by deleting the app

Purchase the ad-free upgrade to stop AdMob loading entirely (once available)

Contact us at privacy@themroc.net to exercise your data rights