For legacy devices, the most stable "base" version is typically or the last officially supported version.
Note: iOS 10.3.4 is a real version (final for older devices like iPhone 5, iPad 4th gen). The number "1034" in the keyword is likely a typo or shorthand for 10.3.4. This article addresses that specific legacy iOS version while prioritizing safety and functionality. download youtube ipa file for ios 1034 best
Always scan IPA files with before sideloading. For legacy devices, the most stable "base" version