Edit: Upgraded tacos to 5 (Earlier it was 3 , only due to pabbly integration issue). There was a super fast response from Blue team and today itself new API code has been shipped as per the comment from Manny.
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If you don't require any integration, this tool works well. Many sumolings tend to buy a tool in appsumo if it includes Pabbly integration because the Pabbly team vets good companies for integration, and Pabbly integration simplifies many tasks. However, Blue offers only basic integration with Pabbly or Albato. I've never encountered an app on AppSumo that demands 5 to 6 action events in Pabbly for integration. Blue is the first of its kind. Apart from integration issue, Blue is an awesome tool and satisfies my needs. Recently Blue team even came with Google Map integration and it is truly delighting to see your records mapped so beautifully.

However Pabbly integration is a let down. To integrate Blue with Pabbly using a basic function like "When a user fills a Formdesigner form, create a record in Blue with user location and phone number," you'll need the following action events:

1. Number formatter (to format position) of the record/ToDoList
2. Date formatter for start date (Blue requires the date in the format 2022-03-26T18:30:00.000Z), which is quite complex
3. Date formatter for end date (Blue requires the date in the format 2022-03-26T18:30:00.000Z)
4. Step to create ToDo record
5. Step to call "custom todo"
6. Step to insert custom field location
7. Step to insert custom field phone number

[Each additional custom field integration like first name, last name, email, etc., will consume more of your Pabbly quota]

For example, if you receive around 200 form submissions monthly (such as in schools or educational institutes), Blue alone would use at least 3000 of Pabbly's quota, even with just 200 submissions a month.

Note: This is just for information purpose to benefit other sumolings. I have spent a lot of time with blue and pabbly and hope this info saves your time.