Privacy Policy
Lunka · Effective 28 August 2026
Lunka is a walking app for small private circles. It has no public profiles, no follower requests, no advertising and no tracking. This policy describes exactly what the app collects, why, and how to get rid of it.
Who is responsible
Lunka is run as a Swedish sole trader business (enskild firma). The data controller is Oliver Harburt. For any question about your data, or to exercise any right described below, write to oliverharburt@gmail.com.
What Lunka collects
| Data | Why | Legal basis |
|---|---|---|
| Name | So the people in your circle can recognise you | Contract |
| Email address | Sign-in, via Apple or a one-time email link | Contract |
| Account identifier | Ties your walks and circles to you | Contract |
| Steps, distance and floors from Apple Health | Your day, your goal and your streak | Explicit consent (Art. 9(2)(a)) |
| Walk routes (GPS) | Recording a walk and drawing it back to you | Contract |
| Photos you attach to a walk | Shown on that walk in your circle | Consent |
| Text you write | Invite notes, route names, circle names | Contract |
| Push token | Delivering the notifications you switched on | Consent |
Health and fitness data is never used for advertising, marketing or profiling, and is never sold or shared with data brokers. Apple's App Store rules require this, and so does this policy.
Your location
Location is read only while you are recording a walk, and only to draw the route and count the distance. Two settings, both in the app under Who sees you, control what leaves your phone:
- Hide where you start (on by default) removes the parts of a route within roughly 200 metres of where you started and finished, so a saved walk does not reveal your home.
- Precise location (off by default) rounds stored coordinates to roughly a 100-metre grid.
When Lunka generates a suggested route, only your starting point — and for a one-way route the destination — is sent to the routing service. Your recorded track is never sent there.
Who can see your walks
Only the people in a circle you joined. Lunka is invite-only: there are no public profiles, no search, and no way for a stranger to find you. This cannot be switched to public, because the feature does not exist.
Services Lunka uses
Lunka contains no advertising SDKs and no analytics SDKs. It relies on these providers:
| Provider | Purpose | What it receives |
|---|---|---|
| Supabase | Accounts, database, file storage | Everything in the table above |
| Apple | Sign in with Apple, push notifications | Sign-in identifier, push token |
| MapTiler | Map tiles | Which map areas your device requests |
| OpenRouteService | Generating walking routes | Start point (and destination for one-way routes) |
| Open-Meteo | Weather windows | Approximate coordinates |
| OpenStreetMap / Overpass | Nearby parks, water and paths | Approximate coordinates |
Lunka's database and uploaded files are hosted by Supabase on Amazon Web Services in Stockholm, Sweden (eu-north-1) — inside the EU/EEA. Push notifications are delivered through Apple, which may process the device token outside the EU under its own terms; no walk, health or location data is included in a notification.
How long it is kept
Your walks, routes and circle membership are kept until you delete them or delete your account. Deleting your account removes your profile, your walks, your saved routes, your photos, your invitations and your circle memberships. This is a real deletion, not a flag — Lunka has no "deactivated" state that keeps your data.
Deleting your account
In the app: Settings → Delete account. It takes effect immediately and cannot be undone. You can also write to oliverharburt@gmail.com and ask.
Your rights
Under the GDPR you may request access to your data, correction of it, deletion of it, a portable copy of it, or restriction of how it is used, and you may withdraw consent at any time. Write to oliverharburt@gmail.com. If you believe your data has been mishandled you may complain to your national supervisory authority; in Sweden this is Integritetsskyddsmyndigheten (IMY).
Children
Lunka is not directed at children under 13, and accounts are not knowingly created for them.
Changes
If this policy changes in a way that affects what is collected or who receives it, the app will say so before the change takes effect.