macOS Mail extension On-device sentiment markers

Make email tone visible, inline in Apple Mail.

Start your day the way you want: focus on positive replies first, or park challenging threads until later. Sentimental enriches Apple Mail with on-device sentiment scoring so you can triage faster and respond with context.

Get Sentimental See capabilities
On-device Offline-first Deterministic

Capabilities

Seamlessly integrated with Apple Mail. Sentimental scores the sentiment of your messages on your Mac and presents clear markers inline so you can triage with confidence.

Seamless Apple Mail integration

Works inside Apple Mail without changing how you read, search, or organise your inbox.

Sentiment scoring with thresholds

Scores messages and lets you choose thresholds so markers match your inbox and tolerance for negative, neutral, or positive tone.

Marker style selection

Select how sentiment shows up: colour semantics or flag-style markers, depending on how you triage.

Message statistics & trends

Review positive, neutral, and negative counts over time with date-range charts.

Sender filters

Include or exclude sender patterns so scoring focuses on the mail you care about.

On-device processing

Analysis happens on your machine. No message content is sent out and Sentimental works offline.

Clean text extraction

Extracts subject and body, removes HTML markup, and normalises whitespace for consistent scoring.

Localized UI

Localized UI so the interface feels native on your Mac.

Download

Install in minutes. Enable the extension in Mail → Settings → Extensions.

Enable the Mail extension

  • 1Open Mail and choose Mail → Settings.
  • 2Open the Extensions tab and tick Sentimental.
  • 3Close Settings and return to your inbox. The change applies immediately.

If Sentimental is not listed, open the app once, then return to Mail → Settings → Extensions.

Sentimental enabled in the Mail extensions list
Click Turn On to enable Sentimental in the extensions list.

Get Sentimental

Download the app and enable the extension in Apple Mail settings.

Coming soon

App Store

Tip: replace the link above with your App Store URL.

System requirements

Basic requirements for a smooth experience.

  • PlatformmacOS 14.6+
  • ArchitectureApple Silicon & Intel
  • IntegrationApple Mail extension
  • ProcessingOn-device