diff --git a/apps/gpsrec/app.js b/apps/gpsrec/app.js
index 73fe6194e..df3353930 100644
--- a/apps/gpsrec/app.js
+++ b/apps/gpsrec/app.js
@@ -330,7 +330,7 @@ function plotGraph(info, style) {
     height: g.getHeight()-(24+8),
     axes : true,
     gridy : grid,
-    gridx : 50,
+    gridx : infn.length / 3,
     title: title,
     xlabel : x=>Math.round(x*dur/(60*infn.length))+" min" // minutes
   });
diff --git a/apps/recorder/app.js b/apps/recorder/app.js
index aa3803794..3548cdb29 100644
--- a/apps/recorder/app.js
+++ b/apps/recorder/app.js
@@ -399,7 +399,7 @@ function plotGraph(info, style) {
     height: g.getHeight()-(24+8),
     axes : true,
     gridy : grid,
-    gridx : 50,
+    gridx : infn.length / 3,
     title: title,
     xlabel : x=>Math.round(x*dur/(60*infn.length))+" min" // minutes
   });