diff --git a/apps/sixths/README.md b/apps/sixths/README.md
index 4b826ca92..8a7d2185a 100644
--- a/apps/sixths/README.md
+++ b/apps/sixths/README.md
@@ -85,12 +85,10 @@ Todo:
 
 *) +-3.5hPa 1012hPa
 
-*) display gps alt + offset to baro
+?) display gps alt + offset to baro
 
-*) start logging altitudes, baro pressure
+?) start logging baro pressure
 
 *) compute climb/descent
 
 *) switch to compensated compass
-
-*) only accept gps fix when altitude matches baro
\ No newline at end of file
diff --git a/apps/sixths/sixths.app.js b/apps/sixths/sixths.app.js
index 9f88a8fea..f9901f8b4 100644
--- a/apps/sixths/sixths.app.js
+++ b/apps/sixths/sixths.app.js
@@ -582,10 +582,13 @@ function touchHandler(d) {
 }
 var lastHour = -1, lastMin = -1;
 function logstamp(s) {
-    logfile.write("utime=" + getTime() + " " + s + "\n");
+  logfile.write("utime=" + getTime() +
+                " bele=" + cur_altitude +
+                " batperc=" + E.getBattery() +
+                " " + s + "\n");
 }
 function loggps(fix) {
-  logfile.write(fix.lat + " " + fix.lon + " ");
+  logfile.write(fix.lat + " " + fix.lon + " ele=" + fix.alt + " ");
   logstamp("");
 }
 function hourly() {