> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://docs.pixalate.com/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.pixalate.com/_mcp/server. # Delisted apps (DEFASE) > DEFASE (Delisted From the App Store) feed reference for mobile and CTV. The three feeds, file names, schema, country-level delisting codes and how to match apps pre-bid. DEFASE stands for **De**listed **F**rom the **A**pp **S**tor**e**. The DEFASE feeds list apps that were available in an app store and have since been removed. Use them to stop buying inventory from apps that the official stores no longer distribute. Apps are delisted for many reasons: publisher-level fraud, malware, adware, backdoors that let fraudsters exploit bad SDKs, copyright violations, or simply because the developer withdrew the app. Not every delisted app generates invalid traffic (IVT), so Pixalate also looks at how an app behaved before it was delisted when deciding whether to flag it as IVT. ## The feeds | Feed | Environment | File name | What it contains | | -------------------- | ----------- | ---------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | | Defase App List | Mobile | `DefasedAppList_YYYYMMDD.csv` | All apps removed from Google Play and the Apple App Store, whether or not they show ads or impressions. | | Defase App Blocklist | Mobile | `DefasedAppBlocklist_YYYYMMDD.csv` | Removed apps that generated impressions in the last 2 weeks and showed evidence of suspicious or invalid behavior. | | Defase CTV App List | CTV | `DefasedCtvAppList_YYYYMMDD.csv` | All CTV apps removed from the Roku, Fire TV, Samsung, Apple tvOS and LG app stores, whether or not they show ads or impressions. | **Which to use:** * **The lists** (`DefasedAppList`, `DefasedCtvAppList`) are for proactive blocking. They can include apps that have no ads or impressions at all, which you may still want to block so they can't be used for IVT later. * **The blocklist** (`DefasedAppBlocklist`) contains apps that have been seen generating impressions, and in general they should be treated as IVT and blocked. Pixalate's algorithms exclude removals that are likely unrelated to IVT, such as an app removed temporarily over an administrative or legal issue that's expected back in the store within days or weeks. ## Country-level delisting An app removed from one country's store may still be available in the same store in other countries. The DEFASE feeds include the countries an app has been delisted from (more than 100 countries are covered) in the `delistedCountryCodes` column. Use it to filter apps delisted in the markets you buy in, while keeping inventory that's still authorized elsewhere. ## File format and cadence | | | | ---------------- | --------------------------- | | Format | CSV | | File names | See [the feeds](#the-feeds) | | Update frequency | Daily | For access, delivery and polling, see [Delivery and integration](/data-feeds/delivery). ## Schema | Column | Type | Description | | ---------------------- | ------ | ---------------------------------------------------------------------------------------------------------- | | `osName` | string | Operating system of the delisted app. For the mobile feeds, iOS or Android. | | `appId` | string | The app identifier. For iOS, the numeric trackId. For Android, the package name. | | `bundleId` | string | Mobile feeds only. The app's bundle ID, documented for iOS apps. For Android, match on `appId`. | | `lastSeen` | string | The date the app was removed from the app store. | | `appStoreUrl` | string | The store URL the app was available from. A delisted app's URL is expected to return HTTP 404 (not found). | | `appStoreName` | string | The store the app was removed from, for example Google Play or Roku Store. | | `delistedCountryCodes` | array | The countries in which the app has been removed from the storefront. | ## Apply it pre-bid All DEFASE feeds share the same semantics, so apply them the same way: * **iOS apps:** match on `appId` (the numeric trackId) or on `bundleId`. * **Android apps:** match on `appId`, which holds the Android package name. * **CTV apps:** the CTV file has no `bundleId` column, so match on `appId`. Common uses: * **SSPs and exchanges:** remove all apps that the official stores no longer authorize, including apps not yet generating impressions, or block only delisted apps that are still serving ads. * **DSPs and agencies:** exclude DEFASE app IDs from campaign targeting, so spend doesn't reach developers banned for potential privacy and policy violations. * **Regional campaigns:** use `delistedCountryCodes` to apply blocking by geography. ## DEFASE and the High Risk app lists [High Risk Mobile Apps 2.0](/data-feeds/high-risk-mobile-apps) and [High Risk CTV Apps 2.0](/data-feeds/high-risk-ctv-apps) flag delisted apps that still generate ad traffic with the `delistedApp` risk type, alongside other risks. The DEFASE feeds are separate because: * Not every organization wants to block all delisted apps. Some only care about apps that have shown impressions, or that show signs of IVT, so they don't block apps removed for reasons such as copyright. * An app with moderate IVT may not show enough evidence to make the High Risk list. Its removal from an app store is an additional strong risk signal, which the Defase App Blocklist uses together with other IVT indicators. In Analytics, traffic from delisted apps is reported under the `defasedApp` IVT type. ## Other ways to get delisting data * **Enrichment API:** look up an app's delisting status and date. See `delistedApp` and `delistedDate` in the [mobile app fields](/apis/enrichment-api-mobile-fields#pixalateadvisories) and [CTV app fields](/apis/enrichment-api-ctv-fields#pixalateadvisories). * **Analytics and the Media Ratings Terminal (MRT):** search and filter delisted apps in the dashboards. * **AWS RTB Fabric:** a module for filtering delisted apps. Ask your Pixalate account manager. ## Related feeds * [High Risk Mobile Apps 2.0](/data-feeds/high-risk-mobile-apps) and [High Risk CTV Apps 2.0](/data-feeds/high-risk-ctv-apps): app-level risk beyond delisting. * [Malformed CTV bundle IDs](/data-feeds/malformed-ctv-bundle-ids): CTV bundle IDs that are malformed or can't be identified. * [MFA data feeds](/data-feeds/mfa): made-for-advertising risk for apps and websites. Questions? Email [support@pixalate.com](mailto:support@pixalate.com).