# Real time Airtable sync

## Real time Airtable sync explained

The Airtable real time sync functionality uses the newest Airtable API and authentication methods to receive the latest updates to your Airtable base quickly in your Stacker app — generally within about 10 seconds, though it can sometimes take up to 5 minutes (see below).

Please note that real time sync is only a data sync. Schema sync will still run once per day automatically, with you being able to trigger a manual schema sync more often if needed.

## Considerations

Here are some considerations to take into account:

* Stacker does not get notified by Airtable for changes to the "last modified by" field.
* Formulas with references to NOW() and similar are not updated automatically.
* Attachment links are not updated automatically— but we will get these once an hour to make sure they continue working.
* On average, the time taken for a change in Airtable to be reflected in Stacker is less than 10 seconds. However, a large amount of changes at once can result in delays of 5 minutes or more.


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