Lambert vs Soildata
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lambert
This application transforms your iPhone into a specialized geological compass. It accurately measures the dip direction and angle of geological strata, displaying real-time orientation data. Measurements can be enhanced with text and plotted on a map for easy transfer to your computer.
- Geological compass functionality
- Measure dip direction and angle
- Real-time stereographic projection
- Wulff and Schmidt Net projection diagrams
- Add text to measurements
- Plot measurement localities on a map
- Transfer data to computer
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This app turns your iPhone into a geological compass, a tool for each geologist. It can be used to measure the direction of dip and the angle of dip of geological strata. The app shows the current device orientation in a realtime stereographic projection. The data can be previewed in projection diagrams (Wulff and Schmidt Net) and transferred to your computer. You can add text to the measurements and plot the measurement localities on a map.
Soildata
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The application is addressed to engineering geologists and geotechnicians to support ground testing investigations. THE PURPOSE of this software is to collect research data within the SOILDATA system: • Classification of soil layers based on PN, EN and EN+PN standards • Observations of groundwater in research points • Description of soil samples with the possibility of printing labels (mobile printer required) • Quality control of geotechnical works based on standards, comments, photographic documentation with geolocation and ongoing reporting at the site of research • Elimination of paper document circulation, research data collected on an ongoing basis. The data collected using the application can then be analyzed via the desktop program available at our company's website, helpful in the preparation of test documentation, including the execution of research point cards and supplemented with the analysis of CPTu soundings. The SOILDATA system requires the creation of an access account via the Soildata website through the form provided there. You can use a free demo version. ---- ADVANTAGES of using the SOILDATA system: • quality and proper data in accordance with standards already at the source of their formation, • true supervision over field research on an ongoing basis, instead of after obtaining documentation, • one-of-a-kind mobile and desktop tool, facilitate geological data collection and processing faster and complex • easier management of the order, project, resources • multifunctionality The aggregation of multiple company and project data and the ability to access it through various methods. This is the way to make work easier, faster and less error-prone. THE SOILDATA SYSTEM A comprehensive tool for conducting and supervising geological and geotechnical surveys for companies and infrastructure investors. The software is used for documentation creation and consists of a desktop module for convenient documentation work in the office and a phone/tablet app for field data collection. Building a database of all data in one program by multiple users (from field work, from the laboratory, from the office) and the possibility of their analysis/interpretation from the program level. This will allow: • quick data access by the project manager; • the ability to check the quality of the data obtained; • possible modification of the project (by, for example, changing the number and type of individual studies); • save time that would have to be spent on rewriting data (e.g. from paper field reports).
Screenshots
Verdict
The clearest difference is iOS requirement: Soildata at 12.0 against Lambert's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Lambert ships an update every 5 months, Soildata every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Lambert | Soildata |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 87 MB |
| Age rating | 4+ | 17+ |
| Developer | Peter Appel | Soildata sp z o o |
In-app purchases
Lambert
No in-app purchases
Soildata
No in-app purchases









