[{"data":1,"prerenderedAt":343},["ShallowReactive",2],{"project-9417354":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":29,"sentiment":30,"stance_mix":31,"scored_comments":36,"aspects":37,"strip":46,"post_text":48,"what":49,"said":76,"maker_in_thread":179,"shape":188,"grid":191,"attempts":304,"same_week":305,"maker_shows":35,"maker_hidden":335,"reader_version":336,"card":337},"9417354","Density","The Heartbeat of a City","title","Show HN: Density – The Heartbeat of a City","https:\u002F\u002Fitunes.apple.com\u002Fus\u002Fapp\u002Fdensity-heartbeat-city\u002Fid955990160","itunes.apple.com","jordanmessina",1429652888,2015,57,45,497,2565,20,"notable","data","foot traffic analytics","mobile_app",[24,25,26,27,28],"foot traffic","door counter","occupancy data","busyness","real time","curious",0.147,{"positive":32,"neutral":33,"mixed":34,"critical":35},8,17,0,4,29,{"privacy":38,"execution":40,"idea":41,"docs":43,"pricing":44,"design":45},{"positive":39,"critical":34},1,{"positive":34,"critical":39},{"positive":42,"critical":39},5,{"positive":34,"critical":39},{"positive":34,"critical":34},{"positive":34,"critical":39},[34,42,34,47,47,34,47,39,47,42,34,34,34,47,42,34,34,47,47,42,47,42,47,42,34,47,34,47,34,42,34,39,47,34,47,47,47,34,39,42],3,null,{"problem":48,"audience":50,"pricing":65,"motivation":48,"time_to_build":48,"stack":73,"openness":74,"stage":75,"team_size":74},{"value":51,"source":52,"evidence":53},"Consumers looking for quiet or busy places and businesses wanting traffic data","inferred",[54,58,62],{"id":55,"by":56,"text":57},"9418462","afar","Yeah. Well, I guess it could be bad if I knew that it was always quiet and therefore \"a drag\" (sorry, that was a weird word to use). But I suspect any bar or club that's…",{"id":59,"by":60,"text":61},"9417671","colinbartlett","Will there be an API for this data to allow business owners to extract it? One of my clients is building a dashboard that correlates data from various sources, and this kind of…",{"id":63,"by":56,"text":64},"9417689","Yes. Actually, that's our model. We designed the hardware to be cheap enough to be free (situation dependent) and then we monetize the resulting data.",{"value":66,"source":67,"evidence":68},"Hardware given away free where possible; company plans to monetize the data, not charge a subscription","maker",[69,70],{"id":63,"by":56,"text":64},{"id":71,"by":11,"text":72},"9417953","Generally, we give the hardware away for free (circumstance dependent). We'd prefer to monetize the data. We don't really want to build a company on $49.99 \u002F mo. There are a lot…",[],"unknown","launched",{"praise":77,"objections":102,"requests":126,"questions":146,"alternatives":165},[78,94],{"value":79,"source":80,"evidence":81},"Cool concept and product","commenter",[82,86,90],{"id":83,"by":84,"text":85},"9417532","shenanigoat","Super cool idea. Best of luck with this.",{"id":87,"by":88,"text":89},"9418950","Kiro","How is the data collected? EDIT: Never mind, I didn't see the website where it's explained: http:\u002F\u002Fwww.density.io\u002F Cool product!",{"id":91,"by":92,"text":93},"9417910","dreaminvm","Had the same idea a while back whenever I called a restaurant to check the wait time and it went to voice mail. App looks good, I will try it out this weekend.",{"value":95,"source":80,"evidence":96},"Useful for finding quiet or busy places and restaurant wait times",[97,98],{"id":91,"by":92,"text":93},{"id":99,"by":100,"text":101},"9418297","dopeboy","This is really cool. My cousin and I had a similar idea but a phone would be used instead of a custom sensor. Question - why would a business be OK with broadcasting a \"quiet\"…",[103,112,119],{"value":104,"source":80,"evidence":105},"Privacy concern about MAC address tracking, now replaced by door counters",[106,109],{"id":107,"by":60,"text":108},"9417425","Glad to see the change in methodology! I loved the concept then and still do, but freaked out at the thought of my MAC address being logged everywhere I go.",{"id":110,"by":11,"text":111},"9417372","We posted Density a while back when we used mac address tracking (https:\u002F\u002Fnews.ycombinator.com\u002Fitem?id=7305097). We've since moved to a wirelessly connected door counter, would…",{"value":113,"source":80,"evidence":114},"Only works where hardware is installed, and needs the business to host it",[115],{"id":116,"by":117,"text":118},"9417878","jsprogrammer","Looks like the business has to purchase (proprietary?) hardware to install on-premises. Usefulness will depend on whether the location you are interested in has the required…",{"value":120,"source":80,"evidence":121},"No Android app yet",[122],{"id":123,"by":124,"text":125},"9417976","yellowapple","Neat idea, though the lack of an Android client is disappointing; is one in the works?",[127,134,142],{"value":128,"source":80,"evidence":129},"Add a list of cities before sign-up",[130],{"id":131,"by":132,"text":133},"9417731","spott","It would be nice if you let people know before they signed up for an account what cities you are in...",{"value":135,"source":80,"evidence":136},"Provide an API or webhooks for the data",[137,138],{"id":59,"by":60,"text":61},{"id":139,"by":140,"text":141},"9420814","jjgames","Are there any plans to make the data available via API or maybe offer webhooks? Would be cool for other folks to mashup this data in various ways.",{"value":143,"source":80,"evidence":144},"Android client",[145],{"id":123,"by":124,"text":125},[147,151,158],{"value":148,"source":80,"evidence":149},"How is the data collected",[150],{"id":87,"by":88,"text":89},{"value":152,"source":80,"evidence":153},"Can it count groups entering together through one door",[154],{"id":155,"by":156,"text":157},"9419302","godara123","Good concept! Just curious - can the device accurately track multiple people (or group) entering \u002F exiting together in one door swing?",{"value":159,"source":80,"evidence":160},"Does it work with places that have more than one entrance",[161],{"id":162,"by":163,"text":164},"9418417","bobbles","Does this only work with places that have one entrance \u002F exit? Or could someone rig up say, an entire hospital with this thing and see stuff like admission \u002F availability of the…",[166,173],{"value":167,"source":80,"evidence":168},"SceneTap, using facial recognition for age and gender split",[169],{"id":170,"by":171,"text":172},"9421442","hammock","SceneTap is doing something similar with facial recognition technology to layer on age and gender split http:\u002F\u002Fscenetap.com",{"value":174,"source":80,"evidence":175},"Parkifi, parking sensing",[176],{"id":177,"by":56,"text":178},"9417985","Re: Minority report. Yeah, I think there's a space in the future where utility and privacy don't have to be traded for one another. There's another cool company doing parking…",{"comments":35,"answered":47,"key":180},[181,182,185],{"id":110,"text":111},{"id":183,"text":184},"9421455","Yup! That's actually our model. I'm really excited to see what people do with the data Love the webhooks idea, I can see users hooking into something like ifttt.",{"id":186,"text":187},"9421478","We're essentially identifying patterns that occur in the voltage readout of two parallel sensors. Two different people, even if passing through without a gap, show enough of a…",{"commenters":189,"max_depth":42,"maker_replies":35,"first_comment_mins":35,"lifespan_hours":190},24,56,[192,194,196,199,203,206,210,213,215,217,221,224,226,229,230,233,236,237,239,242,243,245,247,250,254,256,258,259,262,264,266,268,270,272,274,277,282,285,289,291,295,296,297,300,302],[110,34,34,193,11,39],"maker\u002Fneutral\u002Fnone",[107,34,42,195,60,34],"project\u002Fpositive\u002Fprivacy",[197,34,34,198,56,34],"9417429","commenter\u002Fneutral\u002Fprivacy",[200,34,47,201,202,34],"9417470","project\u002Fneutral\u002Fprivacy","fennecfoxen",[204,34,47,205,56,34],"9418483","project\u002Fneutral\u002Fexecution",[207,34,34,208,209,34],"9418565","commenter\u002Fneutral\u002Fidea","baby",[211,34,47,212,171,34],"9421413","project\u002Fneutral\u002Fidea",[170,34,39,214,171,34],"project\u002Fcritical\u002Fidea",[131,39,39,216,132,34],"project\u002Fcritical\u002Fdocs",[218,39,47,219,220,34],"9417769","maker\u002Fneutral\u002Fdocs","bredfield",[99,222,42,223,100,34],2,"project\u002Fpositive\u002Fidea",[225,222,34,208,56,34],"9418426",[227,222,34,208,228,34],"9418439","PublicEnemy111",[55,222,34,208,56,34],[231,222,47,212,232,34],"9418576","WalterGR",[234,47,42,223,235,34],"9417920","pash",[177,47,34,208,56,34],[238,47,34,208,235,34],"9418121",[240,47,34,241,56,34],"9418440","commenter\u002Fneutral\u002Fnone",[59,35,47,212,60,34],[63,35,47,244,56,34],"project\u002Fneutral\u002Fpricing",[87,42,42,246,88,34],"project\u002Fpositive\u002Fnone",[248,42,47,249,56,34],"9429366","project\u002Fneutral\u002Fdesign",[251,252,42,223,253,34],"9417851",6,"felixthehat",[162,255,47,212,163,34],7,[257,255,47,205,56,34],"9418424",[91,32,42,223,92,34],[260,32,34,261,56,34],"9418028","other\u002Fneutral\u002Fnone",[139,263,47,212,140,34],9,[183,263,34,265,11,39],"maker\u002Fneutral\u002Fidea",[155,267,47,205,156,34],10,[186,267,34,269,11,39],"maker\u002Fneutral\u002Fexecution",[271,267,42,223,156,34],"9425130",[273,267,34,208,56,34],"9429385",[275,267,34,276,156,34],"9431578","commenter\u002Fneutral\u002Fpricing",[278,279,39,280,281,34],"9417807",11,"project\u002Fcritical\u002Fdesign","jontro",[283,279,47,284,220,34],"9417833","maker\u002Fneutral\u002Fdesign",[286,279,34,287,288,34],"9418864","commenter\u002Fneutral\u002Fdesign","catmanjan",[290,279,47,284,56,34],"9429372",[292,293,47,205,294,34],"9417838",12,"Jordanian",[116,293,47,205,117,34],[71,293,34,244,11,39],[123,298,39,299,124,34],13,"project\u002Fcritical\u002Fexecution",[301,298,47,269,220,34],"9417988",[83,303,42,246,84,34],14,[],[306,311,316,321,326,330],{"id":307,"name":308,"points":309,"category":310},"9386004","ACUMAN",430,"ai",{"id":312,"name":313,"points":314,"category":315},"9410452","Kubist",231,"creative",{"id":317,"name":318,"points":319,"category":320},"9413239","Infinite Monkeys",93,"learning_science",{"id":322,"name":323,"points":324,"category":325},"9414449","Theme Creator",91,"dev_tools",{"id":327,"name":328,"points":329,"category":20},"9408208","Linkurious",86,{"id":331,"name":332,"points":333,"category":334},"9420003","Credstash",69,"infrastructure",false,"v2",{"id":338,"name":5,"line":6,"ai":335,"cat":20,"year":13,"points":14,"comments":15,"rec":29,"s":339,"top":18,"kw":340,"maker":11,"domain":10,"tier":19,"attempts":34,"strip":341,"url":9,"mix":342,"praise":79,"objection":104,"sub":21},9417354,0.15,[24,25,26,27,28],"0503303135000350033535350303050130333015",[32,33,34,35],1793990923442]