iTopography vs Lemco app
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
iTopography
Easily calculate the area and perimeter of any surface by mapping its borders. Obtain coordinates from Google Maps, import DXF files, and export your data. Ideal for engineers, topographers, and DIY enthusiasts.
- Polygon area and perimeter calculation
- GPS coordinate acquisition (longitude, latitude)
- DXF file import and export
- Project creation and management
- Map zoom, pan, and rotation
- Manual point addition
- On-the-fly sub-region area calculation
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Key Features: - Computes the angles of any up to 5 vertices polygon - Obtain coordinates (longitude, latitude) from the Google Map - Create an infinite number of projects - Import simple DXF files - Email the data (longitude, latitude and altitude, and the coordinates of the points) - Export the coordinates in a DXF file and then email it - Zoom in/out on the map - Rotate the map (360 degrees) - Manually add points by giving the Longitude/Latitude of the point - Compute the area of any sub-region on the fly -------------------------------------------------- Calculating the area of a surface has never been easier! Whether you are a civil engineer, a topographer, a student or a person who likes to build things on his/her own, you will find iTopography an invaluable tool. iTopography is developed on the premise that a surface can be approximated as a polygon of finite number of lines and vertices (points). Therefore, iTopography can calculate the area of any surface, whether this surface is a garden, the living room, a field or even a geometrical shape for a homework class. iTopography uses the GPS device to obtain the longitude and latitude of the current position. In the case of a weak signal (e.g., inside the house), the user is asked to give the distance and angle between two adjacent points. In order for iTopography to compute the area of a surface, the user must move along the borders of the surface in a clockwise or counter-clockwise direction. When the user inserts a point, iTopography will connect the adjacent points with a straight line, draw the surface, and calculate the area of the surface along with its perimeter.
Lemco app
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Control and set all Lemco bluetooth-enabled modulators.
Screenshots
Verdict
The clearest difference is in-app purchases: Lemco app at none against iTopography's 2. Lemco app also leads on update cadence (every 3 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. iTopography sells 2 one-off in-app purchases. Lemco app asks for nothing beyond the download.
iTopography ships an update every 4 months, Lemco app every 3 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.
| Parameter | iTopography | Lemco app |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 19.2% of reviews | โ |
| Update frequency | Every 4 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Monetization | Free | โ |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 13.0 |
| Further details โ not scored | ||
| Size | 10 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | i-SmartSolutions | Konstantinos Lempidakis |
In-app purchases
iTopography
- Arrange points on the map$0.99
- iTopography Height$0.99
Lemco app
No in-app purchases









