Can you be more specific to what you are trying to achieve.
If I understood correctly, fetch details from different app based on the email address in parent app table. There are mutliple approach to this.
1) Use cross-app relationship and setup a copy of the table in your parent app and then build relationship- This is the old method and hampers the performance.
2) Use Quickbase sync to create a read only copy of your different app table in your parent app. Set permissions to hide from all role. Create relationship as required.
3) Use webhook, create a read only copy of you different app table in parent app and use webhook to refresh the table so that it is always with latest data. create relationship as required.
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Babi Panjikar
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