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• Put the page with the plan on a flat surface and shoot from above so that the whole flat plan is in the frame.
• Use good light, without glare or the phone's shadow.
• A photo, a scan or a JPG or PNG image will do. PDF does not open yet: save the plan as an image.
• If the photo is small, the app warns you — better to retake it closer.
• Keep only your flat and a little margin inside the frame. Leave out the stamp, the address and neighbouring flats.

• Trace the room yourself: “Trace a room”, then tap the corners one by one. To finish, tap the first point or “Close”.
• If rooms are found wrongly, use “Rooms found wrongly? Fix”. A room can be split with a line along the wall, merged with a neighbour, have its corners moved, or be deleted.
• You can tap “Find rooms again” or retake the photo: a clearer photo gives a more accurate search.
• The room search works over the internet. Offline, rooms can be traced by hand — it takes a couple of minutes.

• Check whether the plan has a north arrow or letters for the cardinal directions.
• Or stand by a window, open the compass on your phone and compare with the plan.
• On the last step, turn the arrow with your finger or the buttons; there is a fine 1° turn.
• All findings depend on north. If in doubt, check it: the result screen has a “Change north” button.

Look at the room number and area on the plan: the table of the property passport gives the purpose of each numbered room. If you cannot find it, choose “Don't know” — the room will count as “other”.

A riser is the shared water and sewage pipe, usually in the bathroom or kitchen, often in a corner or a box. If you do not know where it is, you can skip the step.

Yes. At the start the app asks which one you have, and the answer decides what you mark on the plan. For a house, the front door is the main door from the street.

Use the “Save” button on the result screen. Saving needs VastuLab Premium; analyses are kept on the phone in “My analyses”. An analysis keeps only the markup, not the photo of the plan. See the subscription terms.

Google Play → profile icon → “Payments & subscriptions” → “Subscriptions” → VastuLab → “Cancel subscription”. It stays active until the end of the paid month.

Sign in to the same Google account and tap “Restore purchases” in the app. Saved analyses stay on the old phone.

The full photo stays on the phone. To find rooms, only what is inside the frame goes to the server, and it is not stored there. The server computes the findings from the markup — room outlines and marks, without the photo — so a result needs the internet. Details are in the privacy policy.