zio99

  1. I've done away with a lot of the features the OP has - such
  as comments (unless it's Ask HN), time of post and link. This 
  has made it more lightweight and faster to load on slow mobile 
  networks in my area.

  2. Also, it's only updated twice a day since I actually built 
  this for myself to stop spending so much time on HN.
  
  3. And since I found myself only reading the front page on my 
  commute to  work, it aggregates all the front page articles into 
  one nice page instead of opening one article up at a time.

  A startup is too much work for one person.

    (= gravity* 1.8 timebase* 120 front-threshold* 1
       nourl-factor* .4 lightweight-factor* .17 gag-factor* .1)

    (def frontpage-rank (s (o scorefn realscore) (o gravity gravity*))
      (* (/ (let base (- (scorefn s) 1)
              (if (> base 0) (expt base .8) base))
            (expt (/ (+ (item-age s) timebase*) 60) gravity))
         (if (no (in s!type 'story 'poll))  .8
             (blank s!url)                  nourl-factor*
             (mem 'bury s!keys)             .001
                                            (* (contro-factor s)
                                               (if (mem 'gag s!keys)
                                                    gag-factor*
                                                   (lightweight s)
                                                    lightweight-factor*
                                                   1)))))