LevelOne is a standalone application for Windows and macOS that analyses and corrects loudness of a single file or batches.
It works with predefined EBU R128, ATSC A/85 and Calm Act compliant presets and custom presets.
About
Key Features
With this all-in-one loudness batch processor you can:

Super fast drag and drop loudness analysis and processing of files and folders.

Normalise files to comply to ATSC A/85 including dialog detection.

Normalise files to comply to the EBU R128 with a single drop of the file.

True Peak Limiting for fully automated normalisation.

Hotfolders automatically analyse and/or process files when added to a folder.

Stand alone FFmpeg compatibility for optional loudness correction of many more file formats, such as video files. Added with a few clicks.

Use console commands to add and process files though scripting.

Create preset specific droplets to drop files on for your desktop.

Lossless adjustment of MPEG2 and 3 files to preserve the quality of the audio.

Easy readout of file details and all loudness descriptors.

Export CSV files with loudness values.

Add BWF v2 data to wave files including its loudness values.
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System Requirements
Mac: MacOS 10.12 or later, Intel Core Duo, 2 GB RAM (4 GB recommended), Available disk space: approximately 20mb (older versions may work but are not officially supported)
Win: Windows 7 (latest Service Pack, 32/64 Bit), Intel Core Duo or AMD Athlon 64 X2, 2 GB RAM (4 GB recommended), Available disk space: approximately 20mb (older versions may work but are not officially supported)