[kllrnohj]

At launch Android was way more innovative at a systems level with per-application UID sand-boxing & a permission system and system-integration capabilities (broadcasts, services, intents, etc...)

iOS was innovative at a UI/UX level, definitely. But I can't really think of anything they did at a systems level that was at all innovative?

[naasking]

Android didn't innovate those. Per-application sandboxing was the default in capability systems since the 60s, and became more widely deployed in the OLPC Bitfrost security model, and even had a deployment in HP labs' Polaris Windows NT-based environment for virus safe computing. These two projects informed the early Android security model IIRC.