Apple says it will reject Apple Watch apps that just tell the time, more first-party faces may be coming soon
Apple has today added a new guideline to the App Store Review Guidelines, the first clause specifically targeted at Apple Watch development. This rule that Watch apps that only tell time will be rejected has actually been enforced since Apple started accepting WatchKit submissions as many developers complained to find their apps had been rejected for this reason. The documentation change now formalizes this rule into an official policy.