I really like Stackby, having converted a database I previously built in Airtable. Took just a few minutes using import and adding relationships between tables. If anything, I feel like it's easier and quicker to use than Airtable and I've not discovered a limitation yet - it does everything I need. Honestly, for lifetime access, this is an astonishingly good value deal.
I really look forward to seeing this one take off massively. It deserves to do so.