# Lambert vs Secure Message and Text

The clearest difference is price: Lambert at Free against Secure Message and Text's $2.99. Lambert also leads on update cadence (every 5 months vs every 38 months). Secure Message and Text's advantage is iOS requirement (12.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

Lambert is free to download; Secure Message and Text costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lambert ships an update every 5 months, Secure Message and Text every 38 months. The most recent releases landed on June 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Lambert | Secure Message and Text |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/lambert/id341216494/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 38 months |
| Monetization | Free | — |
| Size | 2 MB | 4 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Peter Appel](https://appshunter.io/developer/341216497) | [Dai Phan](https://appshunter.io/developer/1462563314) |

## What reviewers say

### Lambert

[App page](https://appshunter.io/ios/app/lambert/id341216494)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Secure Message and Text

[App page](https://appshunter.io/ios/app/secure-message-and-text/id1462563315)

**In-app purchases:** none


## Frequently asked questions

### Is Lambert free?

Lambert is free to download, with no in-app purchases.

### Is Secure Message and Text free?

Secure Message and Text costs $2.99, with no in-app purchases.

### Do Lambert or Secure Message and Text have ads?

Neither Lambert nor Secure Message and Text shows ads.

### Which is updated more often, Lambert or Secure Message and Text?

Lambert ships an update every 5 months, and Secure Message and Text every 38 months. Most recently, Lambert was updated on June 1, 2026 and Secure Message and Text on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*