# DP vs LM Smart

The clearest difference is update cadence: LM Smart at every 14 months against DP's every 61 months. On price, ads, in-app purchases and device support there is nothing between them.

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

DP ships an update every 61 months, LM Smart every 14 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | DP | LM Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/dp-ir-plus-mobile/id1545902535/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 61 months | **Every 14 months** |
| Monetization | Free | — |
| Size | 174 MB | 1 MB |
| Requires iOS | 14.0 | **13** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heath Consultants Inc](https://appshunter.io/developer/1498450662) | [Aplix Corporation](https://appshunter.io/developer/768010893) |

## What reviewers say

### DP

[App page](https://appshunter.io/ios/app/dp-ir-plus-mobile/id1545902535)

Connect to instruments via Bluetooth to capture leak survey data. Log details of observed leaks, including location and pictures, and view a map of your survey path. Download your data in various formats for analysis.

**Highlights:** Connect to instruments via Bluetooth, Capture leak survey data, Log leak details with location and pictures, View survey map and breadcrumb trail, Download data in CSV, KML, or zip formats, Audible alarm for configurable CH4 values

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### LM Smart

[App page](https://appshunter.io/ios/app/lm-smart/id1546039602)

**In-app purchases:** none


## Frequently asked questions

### Is DP free?

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

### Is LM Smart free?

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

### Do DP or LM Smart have ads?

Neither DP nor LM Smart shows ads.

### Which is updated more often, DP or LM Smart?

DP ships an update every 61 months, and LM Smart every 14 months. Most recently, DP was updated on November 3, 2026 and LM Smart on November 3, 2026.

---

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