TT now separates out naptime from the total sleep-time. You can see this on the sleep summary and the home page.
Here’s how the nap total is calculated:
Any sleep entry where the ‘Fell asleep‘ time is between 8am and 6pm is counted as a nap. This is the inverse of how the overnight sleep-time is calculated (6pm-8am).
This may not be the perfect solution. The advantage to defining a specific time span is that you can accurately compare data to the group average (forthcoming). The disadvantage is that there may occasions when your data steps outside the defined area. For example, if your child gets up at 5am and takes a morning nap from 7:30 to 8:30, that nap wouldn’t be counted toward the daily nap total (it would actually get added to the overnight sleep total).
Even if each user were able to define their own day and night times (for example, day: 6am-5:40pm or night: 7:15pm-8:30am) it is likely that you would run into exceptions from time to time that would cause the calculations to be off.
Eventually I plan to develop a smart algorithm that will distinguish naps from overnight sleep. In the meantime, I think this solution will work — especially as your child gets older and on a better nap schedule.
One note: Please don’t change nap or sleep times to force them to be counted as either naps or overnight. It might make your nap or overnight totals ‘seem’ a little more accurate for the day, but it’s actually damaging the integrity of your data over the long run. The best thing to do is to keep as accurate records as you can, and wait for TT to get smarter 
thanks!
