Zapier does not support two way-syncing right now, for any App. This extends to the idea of keeping records up to date after the initial Trigger and Action occurs (it is not currently supported). Think of Zaps like one-way, one-time actions.
In certain scenarios, you can "fake" two way syncing by setting up two different Zaps that perform opposite actions of each other. However you must take precaution not to create a Zap Loop. Check out this guide for more information on how to avoid Zap loops.
Zapier in general does not have a way to keep items in sync after it has been run through a Zap one time. Think of Zapier like a one-way one-time pipe right now. To this end, updating is something we don't have support for either. These types of features will come in time (and are somewhat available on a case-by-case basis like Highrise and Zoho).
You can email us if you have specific questions about an app. Usually you can tell by creating a Zap and seeing what actions are available for a given app.
When building your Zap, you may have difficulty loading data from the trigger app. Here are some common causes:
Zaps will not be able to see data that was created before your Zap was turned On, they are meant to trigger off data that has been newly added.
One workaround is if you are able to obtain a data export file with all of your data from some App, probably in comma-separated values format (CSV file). With a CSV in-hand, you can semi-manually copy records into a Google Spreadsheet to trigger a Google Spreadsheet Zap. Be wary of rate limits. You can check out this guide for more information.
Sometimes apps treat the same type of data in a different way. For example, some apps separate First and Last name into multiple fields while others group them together. Here are a few ways to add and manipulate data in your Zap:
To be clear, there is no current method inside Zapier to change data on the fly as it passes through a Zap ("split full name into first name and last name" is an example that is not supported right now).
If you have two Zaps that mirror each other, you can potentially end up with "loops" where your Zaps trigger each other repeatedly. To help with this, check out this guide on avoiding Zap loops.
In your Zap you have the option of inserting a custom value in dropdowns that have populated values for you to choose from. Many times, these custom values are the causes of errors, so try using the populated values instead if you do get errors when using the custom values.
If you get errors relating to Unicode characters, please contact us.
This link has more Zap issues that may help to get things working for you!