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ExpertGPT on ChatGPT is an enhanced version of GPT with instructions to improve the quality of its answers. It takes on the persona of an expert teacher in the specified domain.

SaasDB.io on ChatGPT is a platform that offers data on company tool usage from saasdb.io.

Promptest on ChatGPT is a website that helps users enhance and improve their prompt writing skills. With features like /enhance and /feedback, users can craft better prompts. The website also offers skill-building activities such as /brainstorm and /workout.

Starwatcher is a pitch deck analyzer powered by ChatGPT. It specializes in analyzing startup pitch decks and providing executive summaries.

English Mentor on ChatGPT is a website that provides English conversation lessons with a focus on correcting grammar and engaging with questions.