# Lambert — Geocompass for Geologists

> Geological compass for measuring strata dip and orientation. (iPhone/iPad app by Peter Appel.)

- Source: https://appshunter.io/ios/app/lambert/id341216494 (this page in markdown: same URL + `.md`)
- Developer: [Peter Appel](https://appshunter.io/developer/341216497)
- Category: Utilities, Education
- Price: Free (on sale, was $2.99)
- Rating: 5.00/5 from 4 App Store ratings · 16 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 2 MB
- Languages: English, French, German
- Released: 2009-12-18
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/lambert/id341216494/reviews.md

## What is Lambert?

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.

## Key features

- 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

## Recent user reviews (10 of 16)

All indexed reviews: https://appshunter.io/ios/app/lambert/id341216494/reviews.md

### 1/5 — Useless app

*2024-10-06, version 2.01*

Mapped all of our planes 60 degrees to the East wrong and had some weird bug with the colours. Not worth the $5, pretty much a scam

### 5/5 — A must have for geologists

*2014-03-31*

Simple and efficient alternative to bringing a bruntun with you in the field.  This one doesn't cost 300$. Just get it.

### 1/5 — Crash and burn

*2014-01-15, version 1.9*

Crashed every 5 minutes and lost all the data. Not acceptable. iPhone 5.

### 5/5 — Work well

*2013-12-27*

Fast and efficient, I like it a lot!

### 5/5 — Great app!

*2013-05-08, version 1.8*

Easy to use, easy to compile readings, even gives stereonet projections of your acquired readings, definitely would recommend to any geologist out there.

### 5/5 — Great!

*2013-02-11*

If you do field work this app is splendid.  Does all the work of a bunting compass and makes your rosé diagrams and stereo nets.  This is the future.

### 5/5 — Small update. Significant difference

*2011-10-24*

With the addition of the free form text field and the option to email data and diagrams out, this has truly become a stand alone application for rock joint mapping. Was good before. Now it is perfect.

### 3/5 — please make it work on ios5

*2011-10-21*

please make it work on ios5 
it dosent work

### 5/5 — Geologist tool

*2011-05-05, version 1.5*

A very well tool for geologist and students!

### 4/5 — iPad2

*2011-04-15*

This app would be REALLY cool on an iPad2

... ditto on the alternate S/D formats in the previous comment

## Frequently asked questions about Lambert

### What can Lambert measure?

Lambert can measure the direction of dip and the angle of dip of geological strata. It also displays the current device orientation in a real-time stereographic projection.

### How does Lambert display geological data?

Data is shown in real-time stereographic projection and can be previewed in projection diagrams like Wulff and Schmidt Nets.

### Can I add notes or locations to my measurements with Lambert?

Yes, you can add text to your measurements and plot the measurement localities directly on a map within the app.

### How can I get my data from Lambert to my computer?

The app allows you to transfer your geological measurement data to your computer for further analysis and record-keeping.

### What devices is Lambert compatible with?

Lambert is available for iPhone and iPad devices.

### What is the age rating for Lambert?

Lambert has an age rating of 4+, making it suitable for a wide range of users.

### How often is Lambert updated?

The latest version, 3.0.0, was last updated on February 3, 2026, indicating active development.

### Does Lambert have ads?

No, Lambert is ad-free, providing an uninterrupted user experience for geological measurements.

## Version history (last 5 releases)

### 3.1.0 — 2026-05-04

Measurements can now be presented in a Strike (RHR) / Dip notation, when this is selected in the App Preferences.
Fieldbook text entry now directly possible within the Measure View.

### 3.0.0 — 2026-02-03

Code updates and adaptions to recent devices.

### 2.01 — 2019-12-10

Some bugs of the iPad user interface were fixed.

### 2.0 — 2019-12-05

Many code updates for recent iOS versions.
 Data export now also as KMZ file.

### 1.98 — 2017-02-02

-Various bugfixes of the iPhone and iPad user interface.

## Apps similar to Lambert

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [FScan-Pro Fast Scann Expert](https://appshunter.io/ios/app/fscan-pro-fast-scann-expert/id1121922768) | 4.0 (1) | $0.99 | Utilities |
| [Network Utility Pro](https://appshunter.io/ios/app/network-utility-pro/id1088015925) | 4.6 (177) | $2.99 | Utilities |
| [Flying Ruler: 3D Tape Measure](https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844) | 4.1 (186) | $1.99 | Utilities |
| [Calculator Only](https://appshunter.io/ios/app/calculator-only/id1595670490) | — | Free | Utilities |
| [My Chat AI - Smart Assistant](https://appshunter.io/ios/app/my-chat-ai-smart-assistant/id1548714026) | 2.3 (3) | Free | Utilities |
| [StraboField](https://appshunter.io/ios/app/strabofield/id1555903455) | 4.5 (18) | Free | Utilities |

## Related topics

[lambert](https://appshunter.io/ios/topics/lambert)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*