I have an Radio Frequency meter because we moved to a rental that's several blocks from a cell tower and I wanted to check the levels in the house. The signals from almost all transmitting devices definitely fluctuate--you can easily see this on the meter. And so far it corresponds with the amount of traffic carried. And yes, WiFi is a radio frequency. And WiFi and Cell phones are in the microwave range of RFs.
We have an Apple router, various Macs, an Apple Watch, iPads, iPhones, etc. These emit often wildly fluctuating readings, and there are certain actions that will spike the reading of a device from anywhere from 2 to over 200 watts (the biggest spikes were the iPhone 6 Plus and the router consistently outputs a lot of RF). The biggest spikes I've thus far measured came from taking the iPhone out of Airplane Mode (I've had it spike upwards of 260 watts) and for the first couple minutes it will remain high (anywhere from 3 watts to 80) while it retrieves data like mail, texts, weather info, etc. Then it will fall back down to below one watt until I use it for data or voice. The Apple Watch generally has not exceeded 2 or 3 watts. Often it is over 1 watt, and would dip to about 300-600 milliW (0.3-0.6 watts) when it was not actively being used. As a possible benchmark, building biologists set the "safe" zone at no more than 100 milliW (0.1 watt).
[I'm sure everyone has opinions about this standard--I'm just relaying the info for people's consideration. There are lots of places in our house that is well below 100mW even with excellent cell and WiFi coverage, and we have about 7-10 other WiFi networks around us from the neighbors so it's not an impossible standard.]
Furthermore, because the RF intensities are logarithmic in distance to the source, there is a sizeable drop-off in exposure just by stepping a little ways back from an smaller RF source. (For larger RF sources, even a couple blocks makes a remarkable difference in the readings.) So even a few steps can make quite a difference. Again, don't take my word for it--this can easily be tested with the meter.
Out of curiosity, I've just tested the BlueTooth in my car with my iPhone. My meter is unidirectional, so I had the antenna pointed directly at the radio (the phone was not in the antenna's range). I don't know much about BT radiation (whether it's considered RF or not), but I can tell you that like the iPhone, the RF reading spiked for a minute or two before settling down. When the car was running, but the radio was off, the levels were about 30-50 mW (0.03-0.05 watts). When I turned on the radio, it spiked quite high and fluctuated in a high zone (between 5 and 80 watts, or 5000 to 80000 mW). So this might be one possible data point for you, Wongster.
For those who are interested, I have found this article: http://www.newsweek.com/iphone-6-bendgate-apple-says-your-iphone-shouldnt-go-you r-pocket-avoid-273313
And there was a FoxNews article (I know, hardly the model of journalistic objectivity but read it first before passing judgment) that also discusses this: http://www.foxnews.com/tech/2014/10/20/experts-why-wearable-tech-could-pose-heal th-risks/.
In the latter article, the author cites Joel Moskowitz who is the director of the Center for Family and Community Health at the UC Berkeley Prevention Research Center School of Public Health. Moskowitz mentions that the upper SAR limit for devices is currently 1.60. However, according to Moskowitz, that standard was set as a safety precaution for acute exposure. So that safe exposure limit may need to be much lower for chronic exposure. I suppose if you want, you can test the veracity of the citing by contacting Moskowitz. Folks can still disregard what he says as fear-mongering, but then we run into the danger of selective evidence and being just as skewed as the folks we may see as whacked-out.
We love our Apple devices. I doubt my husband will give up his beloved watch any time soon. I also think that people need to do what's right for them. If something doesn't feel right to you, whatever the reason may be, then do what you need to get back into a healthier place for you. And I think people should be allowed to do this without judgment from those who haven't walked in their shoes.