Lambert vs Tracesmap
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.
Tracesmap
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TracesMap combines GPS trace recording and OpenStreetMap POI editing in one app, built for mapping on the go. Record your journeys, upload GPX traces directly to OpenStreetMap, and help improve the world's free map. KEY FEATURES - Record GPX Traces: Capture your GPS tracks with distance-based or time-based recording methods. - Direct OSM Upload: Seamlessly upload your traces to OpenStreetMap with one tap. - Add & Edit POIs: Place new points of interest on the map or edit tags on existing OSM nodes and polygons, with a live tag preview as you edit. - Brand & Place Search: Find businesses and places by name using the Name Suggestion Index (NSI) and apply the matching OSM tags automatically. - Multiple Map Styles: Choose from Carto Vector, Topo Vector, Topo Raster, OSM Raster, and Thunderforest Transport. - Live Dashboard: View real-time speed, elevation, GPS accuracy, and recording stats on-screen. - Public Traces: Browse public GPS traces from other OpenStreetMap contributors in your area. - Metric & Imperial Units: Switch between km/m and mi/ft in settings. - Exclusion Zones: Set locations where GPS recording is automatically paused for privacy. - Background Recording: Keep recording even when the app is in the background. - Cloud Sync: Sync your trace data across devices. - Multilingual: Available in English, French, German, Dutch, Simplified Chinese, and Traditional Chinese. TracesMap is built for the OpenStreetMap community. Log in with your OSM account to start recording traces and editing POIs that help mappers worldwide. Note: Continued use of GPS running in the background can dramatically decrease battery life.
Screenshots
Verdict
The clearest difference is update cadence: Tracesmap at fortnightly against Lambert's every 5 months. Lambert's advantage is iOS requirement (16.6 vs 18.6). On price, ads, in-app purchases and device support 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, Tracesmap fortnightly. The most recent releases landed on June 1, 2026 and September 24, 2026 respectively.
| Parameter | Lambert | Tracesmap |
|---|---|---|
| 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 | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Appel | Tracestrack Map Service |
In-app purchases
Lambert
No in-app purchases
Tracesmap
No in-app purchases









