I was looking to add an air sensor to check on air quality for my basement office. I found good reviews on this unit and so far it has worked great! You can sync via the mobile app and view data from there or you log into the web dashboard to see the results as well. It gives nice options for seeing historical data and I like that for the sake of comparison.

I also wanted to shout out their support. I accidentally knocked over the sensor and broke the stand. Their support found an extra one and just shipped it to me right away, no questions asked. This was done just via their live chat service.

The AIRTHINGS arrived well packaged with comprehensive instructions; downloading of the app and connecting the sensor was painless and easy.

When I extinguished a couple of lit candles in my living room, the sensor went orange! The sensor for the Airthings-292 Wave is in my bedroom. At the same time the MEDIFY air cleaner in my living room where the candles were went on "red". A proven point how well this gadget works! Checking the air quality on the app showed an increase in VOC. Besides that it shows the room temperature, moisture percentage, possibility of mold building, as well as pollen count for my zipcode (seasonal).

I have 2 smaller but efficient air cleaner in my bedroom (no sensor) and the WAVE definitely showed it is working the way it's supposed to.

While this AIRTHINGS does not remedy any air quality issues, it indicates problems and definitely helps keep me healthy.

After watching a British TV show called Grand Designs where a couple built a custom house in London with almost no VOCs (which until I saw this show I'd never heard of) because their two children had chronic asthma with around four chronic attacks a month. The attacks were so severe even the hospital was at its wit's end. After they moved into the new house one child had just one attack in the first 6 months and the other had none. If you don't know about VOCs you should act now. Being able to monitor our indoor air quality atfter cooking and vacuuming and opening windows is like x-raying the health of your house. Sincerest thanks

I have 4 Airthings Wave Minis and 1 Airthings ViewPlus to monitor air quality in my newly built home. I was concerned about air quality as I made my home very airtight and energy efficient. Primary concern was VOC's and temperature variations throughout the home. There are 4 in-floor heating zones monitored by 4 Nest Thermostats for the floor heating and a total of 13 Fujitsu mini split cassettes. In a newly built home, you have many potential sources of VOC's including caulk, paint, stain, glues, etc. as well as unknown carbon dioxide (I have 8 Nest Protects to monitor CO) and radon.

Results of about a year of use: I was surprised when the particulates got high during fire season and I placed 3 Winix air cleaners which run continuously and keep the PMs low or below detectable levels. You can see the PMs get lower as the air cleaners run.
Since the house was open quite a bit during the "extended" build time, VOC's from building materials had mostly gone away. What was interesting were the VOC's from human occupancy.

I spent over 45 years using NIST-traceable temperature data loggers, radiation detection and assay equipment, timing devices, etc and even visited the NIST facilities in Maryland getting a radioactive source calibrated against a primary standard. At that time, it was still the National Bureau of Standards.
Accuracy Question: I know from years of experience that unless you can verify the accuracy of a device using either a certified testing lab or your own NIST-traceable equipment, you can only rely on the reputation of the manufacturer (just like the mfr claims of dietary supplements and disinfectants). Airthings has a great reputation so I'll have to go with that.

Pros: 1) Can view all monitors on the Airthings app on your phone (provided you have a hub).
2) Airthings reputation.

Cons: 1) Need to purchase an expensive hub unless you can walk around and read the devices via Bluetooth OR you have an Airthings ViewPlus which has a hub built-in-which I have.
2) No carbon monoxide detector.

Bottom Line: I believe Airthings are the best consumer devices available. Since we have to rely on the manufacturer's reputation for the claims they make on the device measurement accuracy, Airthings is one of the best so I chose their devices.

My initial review was negative. I bought two to try to triangulate where smoke was entering my apartment. After getting strange results I put them right next to each other, and they were still showing different information.

I reached out to support. They acknowledged the issue and informed me that they had a firmware update that would fix it. They checked in with me a few times to ensure that after the update things were going well. Unfortunately I had to return one, so I haven't been able to cross check them with the new firmware.

It's now been almost 6 months. Using the airthings I was able to find where the smoke is getting in.

The app is garbage still. It often can't sync and I have to kill it to make it work. Pretty sure it's tied to Bluetooth. It freaks out if Bluetooth is off when you start the app and doesn't appear to recover until killed and started with Bluetooth on. The graphs in the app are garbage. Options for scale are 48h, 1 week, 1 month, and 1 year, and you can't pan the graph. It's stupid enough to just average the quality for those ranges. That means you can only see spikes from the last 48 hours, because they average out on higher time frames. It should give a triple graph with high, average, and low values. You should be able to select a section of the graph in the past and zoom into it. Nope. For no reason at all air quality is hugely tied to air temperature. Cold day, air quality is red? That's dumb.

I'm going to try to get another TVOC monitor to cross check this. So far it's not a con, because I can't check it, but I'm wary of it after the two I initially got didn't check out.

Pros:
-battery life, still at 96% after almost 6 months
-size
-seems to be measuring correctly now
-can download all the data through website
-good support

Cons:
-terrible app
-terrible terrible app
-only resolves to like 5 minutes, should be able to set it down to 5 seconds and use more battery