Does anyone here use by simplifi by quicken? What are the pros/cons to ynab?

simplifi only does retroactive reporting, it doesn't not allow you to actually manage an active budget, https://frum.finance/budgeting/why-ynab/ You also will not be able to connect your simplifi app to the frum finance budget insights app for smart monitoring of your budget. https://app.frum.finance

I use Quicken desktop which has more features but it doesn’t connect to Frum Finance either

We've recently started using Quicken for retroactive data summaries. Useful for seeing historical trends (how much have we spent per month per category over the last year, etc). Feel free to PM me if you have questions about it, although I don't use it as much as my husband

Doesn't YNAB offer this in the Reflect tab?

yes but they don't use YNAB