# LD Atlas vs AMT

The clearest difference is update cadence: AMT at every 6 days against LD Atlas's every 2 months. LD Atlas's advantage is ratings volume (4 vs 1). On price, rating, ads and in-app purchases 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 LD Atlas against 5.0 for AMT. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

LD Atlas ships an update every 2 months, AMT every 6 days. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | LD Atlas | AMT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/ld-atlas/id1458129589/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/amt-mrdl/id1590901413/reviews) |
| Number of ratings | **4** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 219 MB | 9 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PCB Piezotronics, Inc.](https://appshunter.io/developer/1049795372) | [Ken Smelquist](https://appshunter.io/developer/1590901415) |

## What reviewers say

### LD Atlas

[App page](https://appshunter.io/ios/app/ld-atlas/id1458129589)

This application connects to specific noise dosimeters and vibration meters via Bluetooth or WiFi. It enables users to monitor meter status, perform calibrations, conduct measurements, and generate detailed PDF reports for analysis.

**Highlights:** Bluetooth/WiFi connectivity, Meter status monitoring, Calibration, Measurement execution, Data review, PDF report generation

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

**In-app purchases:** none


### AMT

[App page](https://appshunter.io/ios/app/amt-mrdl/id1590901413)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LD Atlas free?

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

### Is AMT free?

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

### Which has better reviews, LD Atlas or AMT?

LD Atlas and AMT are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do LD Atlas or AMT have ads?

Neither LD Atlas nor AMT shows ads.

### Which is updated more often, LD Atlas or AMT?

LD Atlas ships an update every 2 months, and AMT every 6 days. Most recently, LD Atlas was updated on October 29, 2026 and AMT on October 27, 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.*