OpenLawn generates lawn polygons for you to review. FindLotSize lets you place markers and calculate the area or distance of a shape you draw. The key difference is who creates the first outline.
By OpenLawn · ReviewedStart with a customer address. Review the mapped grass, correct the outline, and keep the result for your next estimate.
Actual saved residential measurement, corrected by a user. Illustrates OpenLawn only—not a side-by-side accuracy test.
What to include in a lawn measurement →
Accelerated replay of saved polygons, not a live measurement.
FindLotSize’s published guide describes placing and dragging markers, area and distance readouts, and saving measurements in browser storage. Source ↗
| What matters | OpenLawn | FindLotSize |
|---|---|---|
| Starting point | AI maps visible lawn from a selected property address. | Search a place, then place markers around the shape you want to measure. ↗ |
| Area being counted | Designed to separate lawn from roofs, pavement, and other non-lawn surfaces. | Calculates the area of your manually defined shape. ↗ |
| Editing | Review the estimate and adjust lawn polygons when needed. | Drag markers, remove the last marker, or clear the markers. ↗ |
| Saved work | Account-based measurement history you can reopen after signing in. | The web guide describes browser-local saves and warns that clearing browser data removes them. ↗ |
| Measurements | Estimated lawn square footage for service scoping. | Area and distance, with several area units including square feet and acres. ↗ |
Choose OpenLawn when your team repeatedly measures customer lawns and wants an AI-generated starting point plus saved sessions. Spend review time on the grass that matters to the job instead of treating total lot size as the service area.
Consider manual tracing when you already know the exact shape you want and prefer to choose each point yourself. It is also useful for a one-off area or distance check that is not specifically about lawn.
Automation changes how the outline is made; it does not eliminate review. A carefully drawn manual outline can be useful, and an AI outline can still need correction.
It measures the shape you define with markers. Whether that represents lawn, the entire lot, or something else depends on where you place those markers.
No. Review roofs, driveways, planting beds, shadows, and adjoining yards before using the result. Confirm that the mapped lawn matches the work you are actually quoting.
An aerial outline is not a legal boundary determination. Use the appropriate records and a licensed surveyor when a boundary must be legally established.