FLEX
The FLEX (Flipboard Explorer) SDK is a set of in-app debugging and exploration tools for iOS development. When presented, FLEX shows a toolbar that lives in a window above your application.
Its primary SDK category is Crash Reporting and Performance and it's used by iOS apps.
Looking at download trends over the last month, the most popular 
iOS apps that use FLEX are:
Using this information, it appears that FLEX is Not Popular among iOS app developers.
Moreover, over the last 30 days, FLEX has been…
- Installed on 20 iOS apps.
- Deleted from 63 iOS apps.
It's especially popular among iOS apps in the following genres: Business and Shopping.
SDKs that are similar to FLEX:
- HockeyApp in the Crash Reporting and Performance category
- Sentry in the Crash Reporting and Performance category
- Testfairy in the Analytics category
- Breakpad in the Crash Reporting and Performance category
- PLCrashReporter in the Crash Reporting and Performance category
- Embrace in the Crash Reporting and Performance category
- New Relic Mobile in the Crash Reporting and Performance category
- Opencensus OpenTelemetry in the Crash Reporting and Performance category
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