PDA privacy statement

This statement covers PDA, the Personal Dosimetry Assistant, our app for iPhone and Android (com.stroetenga.PersonalDosimetryAssistant). It explains what stays on your phone, what the optional ads and the purchase involve, and what we never see.

Who is responsible

Stroetenga Technologies B.V.
Chamber of Commerce (KvK): 77277260
VAT (BTW): NL860956817B01
Email: privacy@stroetenga.nl

We are the data controller under the General Data Protection Regulation (GDPR) for what this statement describes. A question about anything on this page reaches us at the email address above.

What PDA is

PDA is a set of calculators for radiation protection work: activity, dose rate, distance and decay. There is no account and no login. The numbers you enter are used for the calculation on your phone and are not saved and not sent anywhere.

What is stored on your phone

PDA keeps one small file, features.json, in the app's own storage. It holds:

• whether you bought "Unlock all for good";
• for each tool you unlocked by watching a video, the date its 30 days end.

Nothing else is saved: not your calculations, not the isotopes you picked, not your name. The file stays on your phone and is removed when you delete the app. It is strictly necessary for the app to remember what you unlocked, so it does not need your consent.

Unlocking tools: a video or a purchase

Some tools are locked. You can open them in two ways, and both are your choice.

Watch a short video. "Unlock now" plays one advertising video. Watched to the end, it opens the tool for 30 days. Nothing about ads happens until you tap "Unlock now" for the first time; PDA shows no ads on its own.

Buy "Unlock all for good". A single in-app purchase opens every tool permanently. The payment is handled entirely by Apple or Google: we never see your name, your account or your payment details. The store tells the app only that the purchase exists, and "Restore purchase" asks the store the same question on a new phone.

Advertising

What Google collects for an ad

The ads come from Google AdMob. To choose, show and measure an ad, and to fight ad fraud, Google's software in PDA collects, according to Google:

• the IP address of your phone, which can be used to estimate your general location;
• a device identifier: the advertising identifier of your phone (on iPhone only if you allow tracking, see below) or an identifier that is limited to this app or developer;
• which ads you were shown and how you interacted with them, such as whether a video was watched to the end;
• technical performance and crash information about the ad software.

This data goes to Google, not to us. We see only totals in our AdMob account, such as how many ads were shown; we cannot see who watched them.

You decide first

If you are in the European Economic Area, the United Kingdom or Switzerland, Google's consent message asks for your choice before any ad is requested. You can accept, refuse, or choose per purpose and per partner. Refusing is as easy as accepting. If you refuse, Google may still show non-personalised ads, which use little more than the app and your rough location. Where consent is required, the legal basis is your consent; elsewhere it is our legitimate interest in paying for a free app with advertising.

On iPhone, Apple's own question "Allow PDA to track your activity across other companies' apps and websites?" follows. If you choose Ask App Not to Track, Google does not receive your phone's advertising identifier. You can change that at any time in the iPhone Settings, under Privacy & Security, Tracking.

On Android you can reset or delete your advertising ID in the Android settings, under Privacy, Ads (the exact place differs per phone).

Google is responsible for its part

Google acts as an independent controller for the data it collects this way, so its own terms apply alongside ours:

• How Google uses information from sites or apps that use its services
• Google Privacy Policy
• My Ad Center, to manage ad personalisation directly

Google may process this data outside the European Economic Area. Google states that it relies on the European Commission's Standard Contractual Clauses and the EU-US Data Privacy Framework for such transfers.

The App Store and Google Play

You download PDA from Apple's App Store or Google Play. What those stores record about your account, your downloads and your payments is between you and Apple or Google, under their own privacy policies. From the stores we receive only anonymous totals, such as the number of downloads per country and crash reports that you allowed your phone to share with developers.

What we do not do

• There is no account. No sign-up, no login, no password, no email address.
• We do not run analytics of our own in PDA, and we do not build a profile of you.
• PDA sends nothing to a Stroetenga server. We have no copy of anything you do in the app.
• We do not sell or rent data to anyone.
• We do not use your location, camera, microphone, contacts, photos or files.
• We do not send newsletters or marketing email.
• We do not knowingly collect anything from children beyond what this statement describes.

How long we keep things

• features.json on your phone: until you delete the app. We have no copy.
• Data Google collects for ads: as long as Google's own policy says; see the Google pages above.
• Purchases: recorded by Apple or Google in your store account, under their terms.

Your rights

Under the GDPR you have the following rights. Because we hold very little that identifies you, some of them will have little to act on, but they are yours all the same.

Access

Ask what personal data we hold about you.

Rectification

Have inaccurate data corrected.

Erasure

Ask us to delete your data.

Restriction

Ask us to limit how we use it.

Objection

Object to processing based on our legitimate interest.

Portability

Receive your data in a machine-readable form.

Withdraw consent

Where we rely on your consent, withdraw it at any time, without giving a reason.

Write to privacy@stroetenga.nl to exercise any of these. We answer within one month. For data that Google or Apple hold about you, contact them directly: we cannot reach it on your behalf.

If you are unhappy with how we handle your request, you may lodge a complaint with the Dutch data protection authority, the Autoriteit Persoonsgegevens, or with the supervisory authority in your own country.

Changes to this statement

If what we do changes, this statement changes with it and gets a new "in force from" date at the top. The earlier version stays readable at its own address, listed under "Earlier versions" at the bottom of this page. There is no mailing list to notify, so the date is how you can tell.

Questions about PDA

For privacy questions write to privacy@stroetenga.nl. For anything else about the app, support@stroetenga.nl reaches us. Writing to us is ordinary email: we use your address and message only to answer you, and delete them once the conversation is finished.