You can create a segment based on data from your app or from an app that you have access to.
Click Create segment and choose Based on Yandex data → AppMetrica. Enter the segment name and the app, and choose which type of data to use for selecting users. Note that the segment will be based on data from the past 90 days.
The segment you create will be assigned the “Processing” status. Processing can take up to two hours. If more than 1000 such contacts are found, the segment status will change to “Finished”. Now you can use this segment to set up your ad campaign.
If your access to the app was revoked or changed to read-only access, the segment gets the status “Inactive”, and ad impressions are stopped for the segment.