diff --git a/appfigures.py b/appfigures.py
index 38db1db..aa98f58 100755
--- a/appfigures.py
+++ b/appfigures.py
@@ -18,43 +18,44 @@ def openURL(urlFragment):
 
 
 def getData(pj):
-    # https://stackoverflow.com/questions/9627686/plotting-dates-on-the-x-axis-with-pythons-matplotlib#9627970
     from datetime import datetime
 
     # Remove last couple days, since they're 0
     return list(
         zip(
             *[
-                (datetime.strptime(z["date"], "%Y-%m-%d"), z["downloads"], z["updates"])
+                (
+                    datetime.strptime(z["date"], "%Y-%m-%d"),
+                    z["downloads"],
+                    z["updates"],
+                    z["downloads"] - z["uninstalls"],
+                )
                 for z in sorted(pj.values(), key=lambda _: _["date"])
             ][:-4]
         )
     )
 
 
-def combineDailyToWeekly(pj, func):
-    chunkSize = 7
-    return [func(pj[i : i + chunkSize]) for i in range(0, len(pj), chunkSize)]
+def combineDaily(pj, func, numDays):
+    assert numDays in (1, 7)
+    return tuple([func(pj[i : i + numDays]) for i in range(0, len(pj), numDays)])
 
 
 def getLastElem(arr):
     return arr[-1]
 
 
-def getDownloadsWeekly(t):
-    return combineDailyToWeekly(t[0], getLastElem), combineDailyToWeekly(t[1], sum)
+def getAxes(t, y_axis_choice, numDays):
+    assert len(t[0]) == len(t[y_axis_choice])
+    assert y_axis_choice in (1, 2, 3)
+    assert numDays in (1, 7)
+    assert t[0] == combineDaily(t[0], getLastElem, 1)
+    assert t[y_axis_choice] == combineDaily(t[y_axis_choice], sum, 1)
 
-
-def getUpdatesWeekly(t):
-    return combineDailyToWeekly(t[0], getLastElem), combineDailyToWeekly(t[2], sum)
-
-
-def getDownloadsDaily(t):
-    return t[0], t[1]
-
-
-def getUpdatesDaily(t):
-    return t[0], t[2]
+    return (
+        combineDaily(t[0], getLastElem, numDays),
+        combineDaily(t[y_axis_choice], sum, numDays),
+    )
 
 
 def plotData(filename, ylabel, timespan, x, y):
@@ -68,12 +69,13 @@ def plotData(filename, ylabel, timespan, x, y):
 
     assert len(x) == len(y)
 
+    # https://stackoverflow.com/questions/9627686/plotting-dates-on-the-x-axis-with-pythons-matplotlib#9627970
     plt.clf()
     plt.gca().xaxis.set_major_formatter(mdates.DateFormatter("%Y-%m-%d"))
     plt.gca().xaxis.set_major_locator(mdates.AutoDateLocator())
     plt.xlabel("Date")
 
-    assert ylabel in ("Downloads", "Updates")
+    assert ylabel in ("Downloads", "Updates", "Net New Installs")
     plt.ylabel(ylabel)
 
     assert timespan in ("Daily", "Weekly")
@@ -96,23 +98,36 @@ def main():
     from sys import argv
 
     outputPath = argv[1]
+
+    # TOCTOU, but doesn't much matter. Just helpful to detect
+    # failures early if possible.
     assert checkOutputPath(outputPath)
+
     getPath = lambda n: join(outputPath, n)
 
     data = getData(loads(openURL("sales/dates/-120/0").read()))
-    plotData(
-        getPath("downloads_daily.png"), "Downloads", "Daily", *getDownloadsDaily(data)
-    )
-    plotData(getPath("updates_daily.png"), "Updates", "Daily", *getUpdatesDaily(data))
-    plotData(
-        getPath("downloads_weekly.png"),
-        "Downloads",
-        "Weekly",
-        *getDownloadsWeekly(data)
-    )
-    plotData(
-        getPath("updates_weekly.png"), "Updates", "Weekly", *getUpdatesWeekly(data)
-    )
+
+    # data has, in order: date, downloads, updates, and net new installs
+    for interval, numDays in (("Daily", 1), ("Weekly", 7)):
+        fi = interval.lower()
+        plotData(
+            getPath("downloads_%s.png" % fi),
+            "Downloads",
+            interval,
+            *getAxes(data, 1, numDays)
+        )
+        plotData(
+            getPath("updates_%s.png" % fi),
+            "Updates",
+            interval,
+            *getAxes(data, 2, numDays)
+        )
+        plotData(
+            getPath("netnewinstalls_%s.png" % fi),
+            "Net New Installs",
+            interval,
+            *getAxes(data, 3, numDays)
+        )
 
 
 main()
diff --git a/index.html b/index.html
index b7f07fc..8d25723 100644
--- a/index.html
+++ b/index.html
@@ -4,5 +4,7 @@
         <img src="downloads_daily.png" />
         <img src="updates_weekly.png" />
         <img src="updates_daily.png" />
+        <img src="netnewinstalls_weekly.png" />
+        <img src="netnewinstalls_daily.png" />
     </body>
 </html>