Privacy policy: Sprawdź działkę
Sprawdź działkę has no user accounts and no ads. Searching plots is free; a PDF summary of one plot can be bought in the app. What you save stays on your phone. We do not sell personal data.
Who is responsible
The controller of personal data for Sprawdź działkę is:
- Business name
- Michal Jakubowski
- Address
- Stawy 11-11, 02-467 Warszawa, Poland
- Tax ID (NIP)
- 5261257404
- [email protected]
What the app processes
Plot lookups and our server
When you look up a plot, the app sends what you searched for (a plot ID, an address you typed or a point on the map) to our server api.larkriff.studio, which runs on Cloudflare's network. Our server asks public services of GUGiK (the Head Office of Geodesy and Cartography) and PIG-PIB (the Polish Geological Institute) about that plot and keeps their answers for 24 hours per plot. It stores no account, device or advertising identifier. As with any internet request, our server and Cloudflare receive your IP address; we keep access logs for at most 7 days, only for security and troubleshooting, and do not store IP addresses in application logs.
Location (optional)
Only when you tap “Gdzie stoję” (where I stand), the app asks for your location, after explaining why. It reads your position once and sends that point to our server to find the plot under it, as above. Location is never used in the background and is not stored with any identifier. You can refuse and still search by ID, address or the map.
Map
The street map is drawn from map data (OpenStreetMap, prepared by Protomaps) that the app downloads from our server api.larkriff.studio, as described above. The aerial photo, when you switch it on, and the plot boundaries are loaded directly from GUGiK map services (mapy.geoportal.gov.pl and integracja.gugik.gov.pl with its mirrors integracja01 and integracja02), which receive your IP address, the app's name and the map area shown. The map image in a PDF summary is loaded from GUGiK in the same way.
Public registers for the paid summary
To prepare a summary our server also asks public services about the plot's location only (coordinates or plot ID, no data about you): Rejestr Urbanistyczny, Wody Polskie (ISOK flood maps), GDOŚ (protected areas), PIG-PIB (geology), Bank Danych o Lasach, GIOŚ (noise maps, air quality) and the European Commission's PVGIS (solar potential), in addition to the GUGiK services described above. To measure the distance to utility networks, GUGiK's KIUT service passes the map area around the plot to the county's own map service (geoportal of the powiat). To show the local plan drawing, GUGiK's KIMPZP service passes the same kind of map area to the gmina's own planning map service; street names and street axes come from GUGiK's address register (PRG). Three public datasets are downloaded as a whole and kept on our server, so no request is made about your plot: UKE's list of mobile base station permits (dane.gov.pl, CC BY 4.0), GIOŚ's yearly air quality measurement archive and GUNB's register of building permit applications and notifications (dane.gov.pl, CC0; we keep no names of investors or designers). The app itself asks Rejestr Urbanistyczny (rejestr-urbanistyczny.gov.pl) for the planning acts at the plot's location, because that service does not answer our server; it receives your IP address and the plot's area, like the map services.
Paid PDF summaries
If you buy a summary, Google Play processes the payment; we never see your payment details. The app sends our server the purchase token and the plot ID. Our server checks the purchase with Google Play, then sends the plot's facts from the public registers and public map images of the plot's area, such as the local plan drawing (no data about you), to Anthropic (Claude AI), which writes a short text summary. Our server keeps a one-way hash of the purchase token with the plot ID and the summary, without any personal data, so that you can download a bought summary again. Google gives us the order number, product, date, country and price, which we keep as long as Polish tax law requires (usually 5 years).
On your phone
Saved plots, the last 20 opened plots and bought PDFs are stored in the app on your phone. If Android backup is on, Android may back them up to your Google account; you control this in Android settings. A PDF leaves your phone only when you share it.
Data sources
Plot data comes from public registers: GUGiK (ULDK, KIMPZP, general plans, RCN, PRG, orthophoto) and PIG-PIB (SOPO landslide register). The flood hazard map of Wody Polskie is only linked. LarkRiff is not affiliated with, endorsed by or acting on behalf of GUGiK, PIG-PIB, Wody Polskie or any government entity. The app and its summaries are not official documents.
Permissions are optional: the app asks only when you use a feature that needs them, explains why, and keeps working if you say no.
Purchases and Google services
Purchases (Google Play)
PDF summaries are bought through Google Play. We never see your payment details. What our server does with the purchase is described above under “Paid PDF summaries”.
No ads, no analytics
The app contains no advertising SDK, does not use an advertising ID and sends no analytics or crash reports to us.
Your rights and legal details
Legal bases
Plot lookups, map and purchases: performance of the service you request and of the purchase contract (GDPR Art. 6(1)(b)). Tax records: our legal obligation (Art. 6(1)(c)). Security of our services: our legitimate interest (Art. 6(1)(f)).
Who receives data
Cloudflare, which hosts our server; Google (Google Ireland Ltd. and Google LLC) for purchases; Anthropic PBC, which writes the summary text from plot facts only (no data about you); GUGiK for the aerial photo and plot boundaries. Transfers outside the EEA are covered by the EU–US Data Privacy Framework or the European Commission's standard contractual clauses.
Your rights
You can ask us for access to, correction or deletion of your data, restriction of processing, data portability, and you can object to processing based on legitimate interest. Most data exists only on your phone: uninstalling the app deletes it. You can also complain to the Polish data protection authority: Prezes Urzędu Ochrony Danych Osobowych, ul. Stawki 2, 00-193 Warszawa, uodo.gov.pl.
Children
The app is not directed at children under 13, and we do not knowingly collect their data.
Changes
If this policy changes, we will update this page and the date below.
Last updated: 2026-11-14