HealthKit: same data from multi Apps?

[Julien]

How will HealthKit handle the same data from multiple Apps. Here is an example of conflicting data.

I use several Apps to keep my running info, plus the Health App records. So I do a run and Health already has the milage. If I connect RunKeeper, DigiFit and Strava this will mean the same milage from 4 Apps. Will you get 4x the milage or will HealthKit 'know' or have a way top prioritized which App's data is recorded for an activity?

FitBit and Health steps is another conflict.

 

[BrettDS]

When you select data sources for a particular category there is a note that reads 'When multiple sources are available, one data source will be chosen based on the priority order listed above'.

So it sounds like you can have multiple sources and prioritize them, but it will only take one.