A: Hi muieen, Bika.ai and AITable.ai don’t currently have a built-in “subtask” field, but you can definitely simulate task–subtask relationships using the Link field. You can also group or filter these relationships to visualize them clearly.

Helpful docs:
• Link Field: https://bika.ai/help/reference/database-field/link
• Database Basics: https://bika.ai/help/reference/node-resource/database
Also, this OKR template might help if you’re working with nested goals or structured tasks:
👉 https://bika.ai/template/okr-tracker-quarterly-report-automation

As for “Email to Task” — yes, Bika.ai supports it! You can set Inbound Email as a trigger and use the Create Mission action to turn incoming emails into tasks.
Here’s a quick demo: 👉 https://youtu.be/EOyyC8ak3pE?si=n9BRqwGXF02BEPax

Hope this helps!