I'm using both 1Password for my Mac as well as 1Password for my iPhone 6. Before settling for AgileBits 1Password solution, I have extensively evaluated several of the market contenders. Among them was oneSafe. Lately I received an email with what I consider an interesting feature that might be worthwhile being considered for 1Password; please see screenshot
Of course, a feature like this might already be in 1Password for the iPhone and Apple Watch "tandem"; I don't own an Apple Watch, hence I can't test/check.