I'm looking for a French grammar checker. I think I'm in that intermediate-level plateau where I just need to keep talking / chatting in French but I want to eventually get to a point where I have correct grammar, maybe even some suggestions for idioms.

Some info for my use-case:

• I don't expect to go past 100 "consultations" a month.
• Would be nice if there was an extension that helps for email / Messenger / Telegram / WhatsApp.
• Would be nice if it did help with idioms.

I did my homework and found out that:

• Grammarly does offer this but only in English.
• Language Tool exists but it's 20 euros monthly or 60 euros per year, which are both steep prices for just trying it out.
• Asking ChatGPT works most of the time, but it's a bit annoying to load up that website every time and ask. I'm open to coding something based on the API if that would be the most cost-effective option.

Thanks in advance for all your suggestions!

My dad (a veterinarian by trade) is really into medical history, so I was wondering if folks had any recommendations or favorites. I know he's done a lot of reading about the history of vaccines and the Spanish flu epidemic, but it's really not my area of interest, so I'm somewhat at a loss for how to find him something. Ideally it would be something available on audiobook because that's mostly how he consumes books these days.

Edit: Thanks everyone for the suggestions. I am not sure he has the wherewithal to do podcasts, but the book recommendations are great. I'm going with The Emperor of All Maladies and The Ghost Map, assuming he doesn't have them already.