Walk the boundary. Know your land.

Stop at each corner of your woodland and tap Add point. Lotter draws the outline and gives you the area and perimeter. Then keep the species, the planting year, and every job done there.

Get started

Free for up to 5 terrains. No card needed.

The phone app for iPhone and Android is coming soon. Until then, draw your terrains on the website.

Map a terrain in one walk

  1. 1

    Stop at each corner

    Tap Add point. Lotter shows how accurate the GPS is, in metres. A weak reading is marked, so you can come back and retake it.

  2. 2

    Tap Finish

    Lotter closes the outline and measures it. Read the area in hectares, acres, or square metres.

  3. 3

    Save it

    Give the terrain a name and notes. It goes to your account when you have signal.

No time to walk it? Draw the boundary on a map, on the phone or the website. Drag any corner to fix it.

Remember what you planted, and what you did

Each terrain keeps its species, its planting year, and a work log. Log brush clearing, cutting, cork stripping, or your own kinds of work.

Vale do Freixo

9.41 ha

Species
Cork oak
Planted
March 1998
Age
28 years

Work log

  1. Jul 14, 2025Cork strippingSecond stripping. Next one in 2034.
  2. Apr 2, 2025Brush clearingFirebreak along the road.
  3. Mar 20, 2024Brush clearing

Works without signal

In the hills the map can go blank. Your corners, the outline, the area, and the perimeter still show. Lotter sends your work to your account when you are back in range.

With signal9.41 ha, 1,173 m
No signal9.41 ha, 1,173 m

Your files, in standard formats

Export any terrain as GeoJSON, KML, KMZ, or a zipped Shapefile. Open it in QGIS or Google Earth, or send it to your forestry technician. On the phone, export works offline.

  • Vale-do-Freixo.geojson
  • Vale-do-Freixo.kml
  • Vale-do-Freixo.kmz
  • Vale-do-Freixo-shapefile.zip

Private

Your terrains are in your account only. There are no public links. To share a terrain, export a file and send it.

Prices

Free

€0

Up to 5 terrains at a time. Delete one to free a slot. Everything else is included.

Unlimited

€4.99 a month

or €39.99 a year

As many terrains as you need. Buy on the phone or the website, and it works on both.

Get started

If you stop paying, you keep every terrain. You can still view, edit, and export them.

Questions

How accurate is phone GPS?

It depends on the phone and on the tree cover. Lotter shows the accuracy of every corner and marks the weak ones, so you can stand there again and retake them.

Is this an official survey?

No. Lotter is for your own records. For a legal boundary, ask a licensed surveyor.

What if I edit a terrain on two phones without signal?

Lotter keeps both versions of the boundary and asks you which one to keep. Work log entries from both phones are all kept.

Can I use it on a computer?

Yes. Sign in on the website to see, draw, edit, and export your terrains.

What happens if I stop paying?

If you stop paying, you keep every terrain. You can still view, edit, and export them.