One sentence that survives every character limit a directory throws at it.
Directories ask for the same sentence in four different lengths. Write it once, properly, and you stop rewriting it under a character counter at midnight.
Start with the category noun: a scheduling tool, a Chrome extension, an API. Reviewers scan for the noun first; if they cannot place your product in five words they move on.
One qualifier is enough: for freelance designers, for Postgres teams, for parents of young kids. It narrows the promise and makes the sentence concrete.
What is true after using it that was not true before. Avoid "streamline", "empower" and "supercharge". They read as filler and get edited out by moderators anyway.
60, 100, 160 and 280 characters. Every submission form you will meet fits one of those. Keep them in the same note so you paste rather than rewrite.