I like the idea. At this stage, it appears to just make a few grammatical suggestions. Have you found much research into how much resumes differ on an industry-by-industry basis, profession-by-profession basis and at differing levels of seniority? You could ask users what job title or career path they're aiming for, and offer suggestions to help users tailor their resume accordingly. With a repository of resumes, you could start to offer suggestions such as:

- "90% of people who have held a Project Manager position use 'Managing' to describe at least one of their skills"

- "It is rare for people whose job title includes 'Senior' to use 'Supported' to describe their previous experience"

A few observations on the landing page:

- No visual cue indicated that I needed to scroll down the landing page to see "How it works".

- If this product is "Never pay anything", why do I need to sign in? My preference as a user would be the way https://draw.io works with using Offline Storage, and optional sign-in or "cloud storage" options.

- It isn't clear whether you receive and/or store any data that users enter, and what you do with it.

Building this as a way to help unemployed and underemployed folks find better jobs. I welcome any feedback or ideas to make the goal more achievable.