Privacy Policy

30 Day Challenges ("the app") is published by Kynetics BSD ("we", "us"). In short: you sign in with an email address so your challenges sync across your devices. We use usage statistics to improve the app. The free plan shows Google AdMob ads, which are personalised only if you agree; Premium has no ads. Apple Health data is used only to fill in your challenges. We never sell your data.

1. What we store in your account

• Account: your email address and, if you give one, your first name. Your password is handled by Google Firebase Authentication; we never see it.
• Your challenges: the challenges you start, what you log each day (for example "60 push-ups") and the time you logged it, catch-up and reminder settings, rest days, challenges you create yourself, and built-in challenges you hide.
• Challenges with friends: if you create or join a group, the other members see your first name and how much of each day's challenge you completed. They never see your email address. Anyone with the six-letter group code can view the group's name, members' first names and progress, so share codes only with people you choose.
• Monthly community challenges: joining adds one to a public participant count. Your identity isn't shown.

This is stored in Google Firebase (Cloud Firestore) so it's available on every device you sign in on. Security rules make sure only you can read or change your own data, apart from the group progress described above.

2. What stays on your device

• Reminders are local notifications scheduled on your device. We don't run a notification server.
• Widgets (Home Screen, Lock Screen, Mac desktop, Android home screen) read a summary of today's challenges saved on your device.
• Apple Watch and Wear OS exchange today's challenges and your taps directly with your phone (Apple WatchConnectivity / the Wear OS Data Layer). This doesn't pass through Kynetics BSD.
• Whether you've seen the welcome screens and tutorial, whether Apple Health is turned on, and which Premium subscription the store last reported as active.

3. Apple Health (iPhone, Premium, optional)

• Off by default. If you turn it on in You → Apple Health, the app asks Apple for permission to read your steps, walking and running distance, and active energy. It never writes anything to Apple Health.
• How it's used: when you open the app, today's total is saved as that day's amount on challenges whose goal is counted in steps, km or kcal. It only ever raises the amount; a higher number you logged yourself stays.
• Where it goes: the amount is saved in your account like any other day you log (section 1), so members of a friends group for that challenge see it as your progress. Nothing else from Apple Health is stored or sent anywhere.
• What we never do: Apple Health data is never used for advertising, marketing or analytics, never sent to AdMob or any other third party, and never sold.
• Turn it off: in You → Apple Health, or on your iPhone in Settings → Health → Data Access & Devices → 30 Day Challenges. Amounts already logged stay until you change them or delete your account.

4. Ads on the free plan

• Where: on iPhone, iPad and Android, free accounts see Google AdMob ads: a banner, and a full-screen ad when you close a challenge's page, at most once every 4 minutes and never in the first 2 minutes after you open the app. Premium accounts never see ads and are never asked for ad consent. There are no ads on Mac or on watches. Ads are limited to general-audience content.
• What AdMob collects: your device's advertising identifier (the Android Advertising ID; on iPhone and iPad the IDFA, only if you allow tracking), your IP address and the approximate location Google derives from it, device and app information, and how you interact with ads. Your challenges, your account details and Apple Health data are never sent to AdMob.
• Your consent: in the EEA and the UK, Google's consent form asks whether ads may be personalised. On iPhone and iPad, Apple's tracking prompt then asks whether the app may use your IDFA. You can say no to either and the app works the same, with non-personalised ads.
• Change your mind: You → Ad privacy choices reopens Google's form where it applies. On iPhone and iPad, go to Settings → Privacy & Security → Tracking. On Android, reset or delete your advertising ID in your phone's settings.
• Google uses ad data under its own policy: how Google uses information from apps that use its services.

5. Usage statistics

We use Google Firebase Analytics to learn which features are used and where people get stuck. It receives which screens you open and actions such as "started a challenge", "logged a day", "turned on catch-up" or "joined a group" (with the challenge's ID, such as "one-punch" for a built-in challenge or a random code for one you made, never your own text), your device model, OS and app version, country and language, and a random app-installation identifier. These events are associated with your account's internal ID so we can understand how people use the app over time. They never include your email address, name, Apple Health data or the contents of challenges you write yourself. Firebase Analytics does not use your advertising identifier.

• Why: to fix problems and improve the app.
• How long: usage statistics are kept for up to 14 months, then deleted automatically.

6. Update check

When the app opens it reads settings from Google Firebase Remote Config, such as the oldest app version we still support. If yours is older, the app asks you to update. The app sends nothing of its own for this.

7. Purchases (Premium)

Premium is an auto-renewing monthly or yearly subscription bought through the Apple App Store or Google Play. Payment is handled entirely by Apple or Google; we never see your payment details and we use no other payment service. The store tells the app which subscription is active, so it can turn Premium on or off. How to cancel and get refunds is in the terms of use.

8. Permissions

• Notifications: asked when you start a challenge, for the reminders you choose.
• Apple Health (iPhone, Premium): read-only, asked only when you turn it on (section 3).
• Tracking (iPhone, iPad, free plan): Apple's prompt for personalised ads (section 4).
• Internet: to sign in, sync your challenges, check your subscription and show ads on the free plan.

9. Who we share data with

• Google LLC: Firebase (Authentication, Cloud Firestore, Analytics and Remote Config) processes data on our behalf; AdMob serves ads on the free plan (section 4).
• Apple and Google: the App Store and Google Play handle Premium purchases.
• Members of your friends groups: your first name and daily progress (section 1).

Google may process data in the United States under the UK International Data Transfer Addendum / EU Standard Contractual Clauses. See firebase.google.com/support/privacy. We do not sell your data or share it with anyone else.

Our lawful basis under UK and EU GDPR: providing the service you signed up for (your account, challenges, groups and Apple Health, if you turn it on); your consent (personalised ads); and our legitimate interest in running and improving the app (usage statistics), which you can object to at any time by emailing us.

10. Your rights and deleting your data

• Delete everything: in the app, go to You → Delete account. Your account, challenges, history and custom challenges are deleted immediately. In groups you were part of, your name is replaced with "Former member". Deleting your account doesn't cancel a Premium subscription; cancel it in your store settings. Can't get into the app? See how to request deletion.
• Access, correct or export: you can change your name in the app, and email us for a copy of your data.
• Usage statistics expire automatically (section 5); ask us and we'll delete yours sooner.
• You can complain to the UK Information Commissioner's Office (ico.org.uk) or your local data protection authority.

11. Children

30 Day Challenges is not directed at children under 13 and we do not knowingly collect personal information from children.

12. Changes

If this policy changes we will update the date above and, for significant changes, tell you in the app.

13. Contact

Kynetics BSD, London, United Kingdom. Questions about this policy or your data: support@kyneticsbsd.com.