tonechecker
nounUK /ˈtəʊnˌtʃekə/
US /ˈtoʊnˌtʃekər/
A tool that checks if your words sound kind or mean.
Before sending the email, she ran it through a tonechecker to make sure it sounded friendly.
OTHER MEANINGS
2. A person who listens to music or speech to judge its pitch and quality.
The tonechecker at the studio made sure every note was in tune.
3. Software that flags rude or angry language in online messages.
The chat app's tonechecker warned him that his reply might upset the other player.
4. A device that tests the sound quality of a phone line.
The technician used a tonechecker to find the noisy connection.