Privacy Policy
In short: your data stays on your device. Deckstack has no accounts, keeps nothing about you on any server, and contains no analytics, advertising or tracking.
Who is responsible
Deckstack is provided by Brightstep (Rikard Månsson, sole trader), Sweden. Contact: [email protected].
What is stored, and where
Everything the app knows — your progress, favourites, notes, settings and unlocked content — is stored locally on your device. It is never sent to us or to anyone else.
Feedback you choose to send
If you answer “Not really” when the app asks how it is going, you can write a message to the developer. Sending it transmits only the text you typed, together with the app version so the message can be placed in time. Nothing else is attached — no name, no email, no device identifier, and nothing about your training. Writing nothing sends nothing.
The message is delivered through a form service that forwards it to us by email (Formspree). Please don’t include personal details you don’t want us to have. We use messages only to improve the app and delete them when they are no longer needed. You can ask us to delete a message you sent at any time.
Ratings
If you choose to rate the app, the app asks your device to show the App Store’s own rating dialog. Whatever you do there is between you and Apple.
Purchases
Purchases are handled entirely by Apple. We never see your payment details. Apple tells the app which products you own, so it can unlock them.
Speech
Handsfree audio uses your device’s built-in text-to-speech, or a studio voice you have downloaded. No audio or text you produce is sent anywhere.
Studio voices
In the iPhone app you can download recorded studio voices for handsfree training (Library → Voices). When you open that list or tap Download, the app fetches the list of voices and the voice files from voices.deckstack.app, which is hosted by Cloudflare. Nothing about you is sent with the request; like any download, the server sees your network address in order to deliver the file. We do not use it to identify you. Downloaded voices stay on your device, are not backed up to iCloud, and can be removed at any time. The studio voices are AI-generated.
Third-party resources
The app loads no third-party resources: its icons, fonts and content are all bundled inside the app. The only outside services it contacts are the feedback form described above, when you choose to send a message, and voices.deckstack.app, when you look at or download studio voices.
Backups and deleting your data
The Export function in Settings creates a copy of your data that only you hold; Deckstack never uploads it. Since everything is local, deleting the app (or clearing its website data) permanently deletes all your Deckstack data.
Your rights
Under the EU General Data Protection Regulation you have the right to access, correct and delete personal data about you. Because we hold no data about you apart from feedback you may have sent, these rights mostly concern such messages — contact us and we will help. You can also complain to the Swedish Authority for Privacy Protection (IMY), imy.se.
Newsletter (website)
If you sign up for the newsletter on deckstack.app, we store your email address with our newsletter service, MailerLite (MailerLite Limited, Ireland). It is used only to send you the newsletter. You confirm the sign-up by email, and every newsletter has a link to unsubscribe; you can also write to us and we will remove you. The newsletter is separate from the app: signing up does not connect your email to anything you do in Deckstack.
Changes
If this policy changes, the new version will be published on this page with a new date.