@thinker You're amazing, Nick. And so is your newsletter!

@stewartjarod There are two reasons we've come across - perception and functional. Perception -- when you're anonymous, you can go places a surveillance camera can't. We've heard from stadiums about bathrooms, publicly traded companies that don't want third-party vendors storing video off-premise, churches (turns out people count is how most dioceses dole out capital, college campuses that can't have their students "surveilled," coffee shops and other SMBs who have an aversion to "tracking customers" as a way of gathering relevant data. When a location uses a camera for security and play-back, it's justifiable. When you use the same camera to gather data about foot traffic, or do facial detection, or demographic estimation, it starts to cause privacy issues and can hurt patronage. Functional -- there are a lot of surveillance cameras from a lot of different providers already deployed. Getting them to work properly with one another is a significant challenge. There are computational problems like "hand-off" - when a person moves from one camera's field of view to another. This blind gap in-between those Fields of View needs to be algorithmically accounted for in order to not lose track of the person. You'd also need a lot of cameras installed to cover a large area. There are bandwidth concerns - image processing would have to happen on-device in order to not hog a network. Lastly from a computer vision stand-point, separating all the different kinds of backgrounds from moving objects and correctly categorizing them is not a small task. There are a lot of cameras that do this but there's still basic research going on in right now in university trying to solve this problem. In some cases, we've actually found customers who would like to use Density in conjunction with a closed-circuit security camera system (like tailgating in secure offices) A sensor dedicated to deriving relevant information without compromising consumer privacy has been a big selling point for our customers. It's also easier to explain. Some other uses - https://www.density.io/uses/ Hope this helps!

@abe_storey We cannot determine male v. female. But by design. Anonymity has been an important selling point for many of our customers. Definitely let me know if you'd like to get one andrew@densirty.io

@abe_storey Hey Abe, just following up :)

@michalnaka 100%. We've heard from bus systems, subways, airports, and trains. Long term, we'd love the data to be available to the organizations who deploy as well as their travelers. I think there are some really interesting opportunities in open data.

@andrewfarah absolutely - my company works with transit & mobility providers and users around the world. Would love to keep in touch about this. working with a few cities right now on open sourcing occupancy data.

@darrenbuckner My close friend and Density's very first pilot customer ever. I think we originally met b/c of Product Hunt, actually.

@andrewfarah indeed we did. As your very first pilot customer, I'm proud to have been witness to such great progress. You've come a long way my friend and it's impressive!

@adamroot Appreciate the note. That's high praise. Although... it is summer and tech gets a little sleepy around August :). Why did you find it interesting? Data, business model, device, something else? Would love to hear about your background.

@andrewfarah entrepruner who exited turned angel, now vc. I sent you an invite on LinkedIn and my email is my first name at TricentCapital dot com.

@zachschleien! Indeed. How are those muffins?!

@andrewfarah, sent over our distributor list to our manufacturer. Will be up in 2-3 months.

@andrewfarah What a useful, smart, practical tool to create. Awesome work, I hope you have huge success!

@richlowenberg Rich, ever run into a use case? What is Halo Neuroscience, btw? Thanks for the support!

@andrewfarah Funnily enough, I was having drinks with the IT director of a mega church a couple of nights ago. They're beginning to delve into data science and analytics to manage their five congregations of 40,000 people or so. I'm uncomfortable with religion in general, but it was fascinating to think about church attendance in a startup-y sort of growth model. Right now I believe they manually count the empty seats in the church to estimate attendance. We were talking about the idea of using cell phone mac addresses to measure retention, running A/B tests across their 5 locations etc, but I bet something like this would be really useful to them too. You can see more about Halo Neuroscience here: www.haloneuro.com. We just opened pre-sales on our product yesterday!

@andrewfarah Wow! You guys have added so much to Density in a year since we last spoke! Awesome. BTW, great video. Sandwich?

@andrewfarah @rrhoover This is a simple and useful product with a clean design. And the data could be very useful in an emergency, besides you could add some triggers to platforms like IFTT or Zappier, so people could get notifications when their favorite place has enough people or even trigger IoT devices... sorry if I dream a lot but I see a lot of uses in a simple and clever device like yours.

@widawskij Ah! The Medium article we wrote ages ago! That's awesome that you remember that. Thanks for the support along the way. What do you do? Any way we can be helpful?

@freekgille There are definitely pros and cons to a sub model. The downside is that a customer doesn't get to "own" the hardware, has a recurring fee, etc. The upside is that we can learn from the hardware, swap the hardware when tech gets better, focus on selling the data as opposed to the cost-of-goods-sold + some margin. What do you see as pros and cons?

@alvinmilton Appreciate the share. What do you do? We love hearing from devs.

@jonathanpasky Would love for you to highlight this, too :). My email is andrew@density.io. What's yours?

@kurtiss Could you use credit card transactions?

@madcapslaugh I'd love to hear what stands out for you. Thanks for the support.

@domgoldsworthy Can't wait to get you one! Thanks for the early support, Dom.

@logangarcia (as a result of that website) I'm pretty sure there are several "I've been up since 4am" looks on our team's faces, :).

@andrewjdupree The gym is a legit issue