# Lambert vs ORP Basic for Jenco ORP650B

Lambert and ORP Basic for Jenco ORP650B both sit at 5.0 stars, but that hides the real split: 100% of ORP Basic for Jenco ORP650B's written reviews are positive against 75% of Lambert's. ORP Basic for Jenco ORP650B also leads on iOS requirement (9.0 vs 16.6). Lambert's advantage is update cadence (every 5 months vs every 15 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Lambert against 5.0 for ORP Basic for Jenco ORP650B. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews are what separate them: 75% of Lambert's written reviews are positive against 100% of ORP Basic for Jenco ORP650B's.

Lambert ships an update every 5 months, ORP Basic for Jenco ORP650B every 15 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Lambert | ORP Basic for Jenco ORP650B |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/lambert/id341216494/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/orp-basic-for-jenco-orp650b/id1315381470/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 3 MB | 19 MB |
| Requires iOS | 16.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Peter Appel](https://appshunter.io/developer/341216497) | [Jenco Instruments, Inc.](https://appshunter.io/developer/1275832649) |

## 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


### ORP Basic for Jenco ORP650B

[App page](https://appshunter.io/ios/app/orp-basic-for-jenco-orp650b/id1315381470)

This app pairs with a Jenco ORP Bluetooth tester to provide accurate ORP and temperature readings. It offers guided calibration, a clear display of measurements, and useful features like calibration reminders and battery life indicators.

**Highlights:** Accurate ORP and temperature measurement, Bluetooth pairing with Jenco tester, Guided calibration procedures, Reading quality indicator, Displays tester battery life, Pause readings (Hold)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lambert free?

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

### Is ORP Basic for Jenco ORP650B free?

ORP Basic for Jenco ORP650B is free to download, with no in-app purchases.

### Which has better reviews, Lambert or ORP Basic for Jenco ORP650B?

Lambert and ORP Basic for Jenco ORP650B are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.

### Do Lambert or ORP Basic for Jenco ORP650B have ads?

Neither Lambert nor ORP Basic for Jenco ORP650B shows ads.

### Which is updated more often, Lambert or ORP Basic for Jenco ORP650B?

Lambert ships an update every 5 months, and ORP Basic for Jenco ORP650B every 15 months. Most recently, Lambert was updated on November 1, 2026 and ORP Basic for Jenco ORP650B on November 2, 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.*