My girl just hit 6months and we've been working on recall. Command is "here" - she's clicker trained, so first I taught her to target my hand at further and further distance (palm facing her, down by my side) and then added the voice command to the visual once she got it.
She's brilliant in-house, and I take her on a 15ft line out in the local streets/trails, and when there's only minor distractions she is quick to return (we're definitely "in progress" when it comes to distractions like loud machinery, other dogs, kids playing/screaming etc).
But she's nowhere near a stage where I'd be confident with her off leash. Some people on the forums seem to hold with "never off leash until you're very confident in all situations" - and others talk frequently of having their pup off leash from day1/8 weeks and on trails etc.
So I'm curious, what age was your pup when you started? (Anyone who has advice/tips as to improving recall would be awesome too