[{"data":1,"prerenderedAt":355},["ShallowReactive",2],{"project-9430475":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":35,"aspects":36,"strip":44,"post_text":45,"what":46,"said":75,"maker_in_thread":180,"shape":189,"grid":193,"attempts":315,"same_week":316,"maker_shows":240,"maker_hidden":347,"reader_version":348,"card":349},"9430475","Cardiogram","Continous Heart Rate for Android Wear and Apple Watch","title","Show HN: Continous Heart Rate for Android Wear and Apple Watch","http:\u002F\u002Fwww.cardiogr.am","cardiogr.am","brandonb",1429830232,2015,62,53,457,2565,18,"notable","hardware","wearable health monitoring","mobile_app",[24,25,26,27,28],"heart rate monitor","android wear","apple watch","continuous heart rate","fitness tracker","curious",0.022,{"positive":32,"neutral":33,"mixed":34,"critical":32},5,16,0,26,{"performance":37,"idea":39,"privacy":41,"execution":42,"docs":43},{"positive":34,"critical":38},3,{"positive":38,"critical":40},1,{"positive":34,"critical":34},{"positive":34,"critical":40},{"positive":34,"critical":34},[40,34,34,40,34,38,34,38,38,34,38,34,34,34,34,32,40,32,38,34,34,38,32,38,40,34,38,38,34,38,34,32,32,38,38,38,38,34,38,34],null,{"problem":47,"audience":55,"pricing":45,"motivation":66,"time_to_build":45,"stack":72,"openness":73,"stage":74,"team_size":73},{"value":48,"source":49,"evidence":50},"Continuous heart rate tracking on smartwatches, beyond periodic readings.","maker",[51,54],{"id":52,"by":11,"text":53},"9430596","We've had surprisingly good experiences—generally the beta testers are reporting 1-3% battery consumption, and I think we could sample more frequently. I think if we can get…",{"id":52,"by":11,"text":53},{"value":56,"source":57,"evidence":58},"Smartwatch owners who want continuous heart rate data.","inferred",[59,63],{"id":60,"by":61,"text":62},"9430573","DenisM","Is there any watch on the market that has enough battery to do real continuous HR monitoring? Last I checked, they all only measure continuously in the \"sport\" mode for an hour…",{"id":64,"by":11,"text":65},"9430566","I have a Moto 360 and like it a lot! It was recently on sale for $180, and I'm going to guess it'll be on sale again, since the Apple Watch is just starting to ship and new…",{"value":67,"source":49,"evidence":68},"Maker sees heart rhythm monitoring as a path to detecting heart problems early.",[69],{"id":70,"by":11,"text":71},"9430906","Oh! I wrapped up my involvement last fall. It was a 2-month rotation that became 3 months, then 5 months, then 8 months, ... After taking a couple months off, I started…",[],"unknown","beta",{"praise":76,"objections":92,"requests":123,"questions":135,"alternatives":158},[77],{"value":78,"source":79,"evidence":80},"Useful idea for continuous heart rate tracking on wearables.","commenter",[81,84,88],{"id":82,"by":11,"text":83},"9430492","Hey! I'm the OP. Let me know if you have any questions. Just for fun, this was my heart rate while launching this: https:\u002F\u002Ftwitter.com\u002FAppCardiogram\u002Fstatus\u002F591377862441046016",{"id":85,"by":86,"text":87},"9431269","potomushto","I use a fitness tracker called MIO Fuse - it's a great сontinious Heart Rate Monitor, but Mio has very painful and useless both Android and iOS app. I wish to have access to raw…",{"id":89,"by":90,"text":91},"9432934","ddmf","Thank you so much, I had hoped that there would be something like this inbuilt with motofit\u002Fgoogle fit but was quite disappointed when I discovered how inadequate and manual it…",[93,108,115],{"value":94,"source":79,"evidence":95},"Optical heart rate sensors are too noisy for true heart rate variability.",[96,100,104],{"id":97,"by":98,"text":99},"9430883","saspect","Capturing HR once a minute is of really limited use. More than benchmarking against resting HR, the interesting thing is to look at heart rate variability, and to do that you…",{"id":101,"by":102,"text":103},"9431203","photonic29","Photoplethsymographic heart rate requires a lot of algorithmic compensation for noise and motion artifact. There are some pretty sophisticated strategies available for beat…",{"id":105,"by":106,"text":107},"9431096","andrewjshults","Even the standalone optical HRMs (e.g., Scosche RHYTHM+) aren't good enough to do HRV[1] even though their accuracy compares favorably with the chest strap models[2] [1]…",{"value":109,"source":79,"evidence":110},"Notification keeps the sensor on and drains battery on Gear Live.",[111],{"id":112,"by":113,"text":114},"9431187","bbarn","OP - I love the concept, but the execution isn't there. I installed it on my Gear Live, and it pops up a \"Heart Rate\" notification, that until acknowledged leaves the heart rate…",{"value":116,"source":79,"evidence":117},"Battery impact is a concern on smartwatches.",[118,119],{"id":60,"by":61,"text":62},{"id":120,"by":121,"text":122},"9430582","sekasi","I'd love to hear some thoughts on how this affects battery, especially on some battery-challenged devices such as the moto360 ?",[124,131],{"value":125,"source":79,"evidence":126},"Calorie app integration.",[127],{"id":128,"by":129,"text":130},"9430560","stephengillie","Cool! How soon until you can tap into a calorie app\u002Fdatabase (MyFitness?) and start to guesstimate the user's caloric burn rate each minute?",{"value":132,"source":79,"evidence":133},"Access to raw heart rate data.",[134],{"id":85,"by":86,"text":87},[136,147],{"value":137,"source":79,"evidence":138},"How is data stored and is it sent to servers?",[139,143],{"id":140,"by":141,"text":142},"9430801","ianstallings","I'm curious about the privacy aspects of it. Can anyone elaborate on where and how the data is stored?",{"id":144,"by":145,"text":146},"9431052","_asummers","In a related question, does anyone know of any monitoring product (e.g. FitBit or whatever) that does NOT send your data to a centralized server outside of your control?",{"value":148,"source":79,"evidence":149},"How does it access the heart rate sensor on Apple Watch?",[150,154],{"id":151,"by":152,"text":153},"9430769","martingordon","How does this work on Apple Watch? AFAIK, WatchKit doesn't give access to the heart rate sensor.",{"id":155,"by":156,"text":157},"9431367","blazingswrd","Hey Brandon, I'm doing usability research at Virginia Tech on EEG's and EKG's. I'm trying to figure out how to do continuous heart rate for Apple Watch for an app\u002Fstudy. How are…",[159,166,173],{"value":160,"source":79,"evidence":161},"Fitbit Charge HR",[162],{"id":163,"by":164,"text":165},"9430649","kevlened","I have a Fitbit Charge HR that checks every second during exercise and every 5 seconds otherwise. The battery lasts about 4 days for me. https:\u002F\u002Fwww.fitbit.com\u002Fchargehr",{"value":167,"source":79,"evidence":168},"Suunto watches",[169],{"id":170,"by":171,"text":172},"9431056","fancyketchup","Suunto's watches have done that for a while now (5-6 years?), though they use a capacitive chest strap, rather than the optical method used by smart watches. Edit: And as far as…",{"value":174,"source":79,"evidence":175},"Cinch",[176],{"id":177,"by":178,"text":179},"9430804","sdrothrock","I've been using Cinch up til now; it would be great if Cardiogram sent the data to Google Fit to graph like Cinch does!",{"comments":181,"answered":182,"key":183},14,8,[184,187,188],{"id":185,"text":186},"9431374","This is really useful! Would you mind emailing me at brandon@cardiogr.am? I'd love to know more.",{"id":82,"text":83},{"id":52,"text":53},{"commenters":190,"max_depth":191,"maker_replies":181,"first_comment_mins":192,"lifespan_hours":35},31,6,4,[194,196,200,203,204,205,207,210,211,213,215,218,220,222,224,226,230,233,234,238,243,247,249,251,253,255,258,259,260,262,264,266,268,271,273,277,279,281,283,287,289,291,295,298,303,306,307,309,311,313],[97,34,40,195,98,34],"project\u002Fcritical\u002Fperformance",[197,34,34,198,199,34],"9430902","commenter\u002Fneutral\u002Fnone","jhwhite",[201,34,34,198,202,34],"9430933","matco11",[105,34,40,195,106,34],[101,34,40,195,102,34],[185,34,34,206,11,40],"maker\u002Fpositive\u002Fnone",[208,34,38,209,102,34],"9436800","maker\u002Fneutral\u002Fnone",[82,40,34,209,11,40],[60,40,38,212,61,34],"project\u002Fneutral\u002Fperformance",[52,40,34,214,11,40],"project\u002Fpositive\u002Fperformance",[216,40,38,212,217,34],"9430727","teraflop",[219,40,34,212,11,40],"9430747",[221,40,38,212,61,34],"9434493",[163,40,34,223,164,34],"other\u002Fneutral\u002Fnone",[225,40,34,198,61,34],"9434517",[227,40,34,228,229,34],"9430855","other\u002Fneutral\u002Fperformance","octotod",[231,40,34,228,232,34],"9430882","smoyer",[170,40,34,223,171,34],[235,40,38,236,237,34],"9431210","project\u002Fneutral\u002Fnone","Navarr",[239,240,32,241,242,34],"9430898",2,"project\u002Fpositive\u002Fidea","arexi",[244,240,40,245,246,34],"9431037","project\u002Fcritical\u002Fidea","davegardner",[85,38,32,248,86,34],"project\u002Fpositive\u002Fnone",[140,192,38,250,141,34],"project\u002Fneutral\u002Fprivacy",[252,192,34,250,11,40],"9430869",[144,192,34,254,145,34],"other\u002Fneutral\u002Fprivacy",[256,192,34,254,257,34],"9431105","calvin_c",[151,32,38,236,152,34],[89,191,32,241,90,34],[155,261,38,209,156,34],7,[263,261,34,209,11,40],"9431399",[112,182,40,265,113,34],"project\u002Fcritical\u002Fexecution",[267,182,34,209,11,40],"9431444",[128,269,38,270,129,34],9,"project\u002Fneutral\u002Fidea",[272,269,34,270,11,40],"9430569",[274,275,38,236,276,34],"9430791",10,"dannyr",[278,275,34,236,11,40],"9430862",[280,275,38,209,276,34],"9430878",[70,275,34,282,11,40],"maker\u002Fneutral\u002Fidea",[284,285,32,241,286,34],"9430554",11,"mintplant",[64,285,34,288,11,40],"maker\u002Fneutral\u002Fperformance",[290,285,32,206,286,34],"9430589",[292,293,38,270,294,34],"9430978",12,"j_m_b",[296,293,38,236,297,34],"9431024","IBM",[299,300,38,301,302,34],"9430779",13,"project\u002Fneutral\u002Fdocs","cllunsford",[304,300,34,305,11,40],"9430815","maker\u002Fneutral\u002Fdocs",[120,181,38,212,121,34],[308,181,34,214,11,40],"9430631",[177,310,38,236,178,34],15,[312,310,34,236,11,40],"9430868",[314,310,34,198,178,34],"9430881",[],[317,322,327,332,337,342],{"id":318,"name":319,"points":320,"category":321},"9432949","Transformy",764,"productivity",{"id":323,"name":324,"points":325,"category":326},"9427856","Startup Generator",607,"creative",{"id":328,"name":329,"points":330,"category":331},"9458268","Ramjet.js",309,"languages",{"id":333,"name":334,"points":335,"category":336},"9452606","Caddy",208,"infrastructure",{"id":338,"name":339,"points":340,"category":341},"9445524","Startup Timelines",111,"learning_science",{"id":343,"name":344,"points":345,"category":346},"9433661","FeatHub",108,"dev_tools",false,"v2",{"id":350,"name":5,"line":6,"ai":347,"cat":20,"year":13,"points":14,"comments":15,"rec":29,"s":351,"top":18,"kw":352,"maker":11,"domain":10,"tier":19,"attempts":34,"strip":353,"url":9,"mix":354,"praise":78,"objection":94,"sub":21},9430475,0.02,[24,25,26,27,28],"1001030330300005153003531033030553333030",[32,33,34,32],1794036530685]