> ## Documentation Index > Fetch the complete documentation index at: https://docs.asobeast.com/llms.txt > Use this file to discover all available pages before exploring further. # Compare a portfolio > Link the App Store and Google Play listings of one product into a group, compare visibility across it and receive a weekly portfolio digest. A portfolio view exists because most products ship on both stores, and reading two disconnected app pages hides the thing you actually want to know: whether the product is gaining visibility overall. ## Group linked listings A linked app group holds at most one app per store, so the App Store and the Google Play listing of the same product belong in exactly one group together. Grouping does not merge their data. Scores stay store specific and are never averaged across stores, because Apple and Google Play scores come from different public evidence. See [App Store and Google Play](/concepts/stores). What grouping gives you is a single row for the product, with each store's numbers side by side. ## Compare group visibility Visibility rolls a set of keyword positions into one number, so a group's visibility is comparable with itself over time rather than with another group. Use it as a trend, not as a score out of 100. A visibility fall is what `rank.investigate_drop` and `market.improve_country` both key off. See [Work the Action Center](/guides/action-center). ## Follow trends Two levels of trend are available. | Level | Answers | | --------- | -------------------------------------------------------- | | Per app | Did this listing gain or lose visibility over the window | | Portfolio | Did the whole set move, or only one listing | The portfolio level is what separates a market wide shift from a problem with one listing. If every app fell on the same day, look at the store rather than at your metadata. ## Receive the weekly digest The digest is sent by webhook on `CRON_DIGEST`, which defaults to `0 8 * * 1`, meaning 08:00 UTC on Monday. It has its own schedule and bypasses the batched alert outbox entirely, so it arrives on time regardless of how long the daily pipeline ran. Subscribe a webhook channel to `digest.weekly`. See [Send alerts](/guides/alerts). ## Troubleshooting * **A group refuses a second app.** A group holds one app per store. Two App Store listings cannot share a group. * **Visibility is missing for a market.** Visibility needs observed days. A market added this week does not have them yet. * **The digest never arrives.** It is webhook only. An email channel does not receive it. ## Related Chart positions alongside search positions. Where the digest is subscribed.