@bagder Hmm, that's a tricky one, if we just count the number of instances I think sqlite is higher than libcurl or OpenSSL because those would likely depend on dynamically linked libraries installed once per machine, but sqlite is often embedded and thus installed multiple times... but you're asking specifically about which one is installed in most devices, not most installed overall.
@bagder I don't know how it's done on iOS, but on Android as far as I know the "native" (Kotlin/Java) implementations don't use libcurl, but Room uses sqlite, so it is more likely for apps to create a new instance of sqlite than libcurl. That being said, they depend on OpenSSL for HTTPS calls, so maybe OpsnSSL is the winner on Android devices, as basically all apps make HTTPS calls but not all apps have a local DB with sqlite, and libcurl installations don't scale linearly with the number of apps...