LD Atlas vs AMT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LD Atlas
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.
- Bluetooth/WiFi connectivity
- Meter status monitoring
- Calibration
- Measurement execution
- Data review
- PDF report generation
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LD Atlas allows you to communicate via Bluetooth or WiFi with Larson Davis Spartan Noise Dosimeters - Models 730 and 730IS, Human Vibration Meters - Model HVM200, Spartan 821/721, and SoundExpert 821/721. You can view meter status, calibrate meters, make measurements, review measurement data, create and view PDF reports, and analyze data. Due to restrictions introduced in iOS, this version of Atlas does not support the 831C. Please contact support for alternatives or assistance.
AMT
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This app allows you to connect to and read your DD-Meter.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | LD Atlas | AMT |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 219 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | PCB Piezotronics, Inc. | Ken Smelquist |
In-app purchases
LD Atlas
No in-app purchases
AMT
No in-app purchases
