diff --git a/apps/speedalt2/ChangeLog b/apps/speedalt2/ChangeLog
index 73e9bfc40..9e2abb4ef 100644
--- a/apps/speedalt2/ChangeLog
+++ b/apps/speedalt2/ChangeLog
@@ -13,3 +13,4 @@
 1.14: Add VMG and coordinates screens
 1.43: Adds mirroring of the watch face to an Android device. See README.md
 1.49: Droidscript mirroring prog automatically uses last connection address. Auto connects when run.
+1.50: Add configuration item Wpt File Suffix. A one character suffix to append to the waypoints.json file. A number of other apps also use this file name. Using the file name suffix allows the speedalt2 waypoints to be retained if one of these other apps is installed for a different use.
diff --git a/apps/speedalt2/README.md b/apps/speedalt2/README.md
index e1c6b0a5a..c124e0c00 100644
--- a/apps/speedalt2/README.md
+++ b/apps/speedalt2/README.md
@@ -78,6 +78,10 @@ Waypoints are used in Distance and VMG modes. Create a file waypoints.json and w
 
 The [GPS Navigation](https://banglejs.com/apps/#gps%20navigation) app in the App Loader has a really nice waypoints file editor. (Must be connected to your Bangle.JS and then click on the Download icon.)
 
+By default the waypoints file is called waypoints.json
+
+**Note** : The waypoints.json file is used by a number of different gps apps. The setting 'Wpt File Suffix' allows one of waypoints1.json, waypoints2.json or waypoints3.json to be used instead. This allows the other apps to be used with a different set of waypoints without losing the speedalt2 waypoint set. 
+ 
 Sample waypoints.json (My sailing waypoints)
 
 <pre>
diff --git a/apps/speedalt2/app.js b/apps/speedalt2/app.js
index ed16131a4..4cdf71913 100644
--- a/apps/speedalt2/app.js
+++ b/apps/speedalt2/app.js
@@ -5,8 +5,9 @@ Mike Bennett mike[at]kereru.com
 1.14 : Add VMG screen
 1.34 : Add bluetooth data stream for Droidscript
 1.43 : Keep GPS in SuperE mode while using Droiscript screen mirroring
+1.50 : Add cfg.wptSfx one char suffix to append to waypoints.json filename. Protects speedalt2 waypoints from other apps that use the same file name for waypoints.
 */
-var v = '1.49';
+var v = '1.50';
 var vDroid = '1.50';    // Required DroidScript program version
 
 /*kalmanjs, Wouter Bulten, MIT, https://github.com/wouterbulten/kalmanjs */
@@ -209,7 +210,7 @@ function nxtWp(){
 }
 
 function loadWp() {
-  var w = require("Storage").readJSON('waypoints.json')||[{name:"NONE"}];
+  var w = require("Storage").readJSON('waypoints'+cfg.wptSfx+'.json')||[{name:"NONE"}];
   if (cfg.wp>=w.length) cfg.wp=0;
   if (cfg.wp<0) cfg.wp = w.length-1;
   savSettings();
@@ -718,6 +719,7 @@ cfg.primSpd = cfg.primSpd||0;    // 1 = Spd in primary, 0 = Spd in secondary
 cfg.spdFilt = cfg.spdFilt==undefined?true:cfg.spdFilt; 
 cfg.altFilt = cfg.altFilt==undefined?true:cfg.altFilt;
 cfg.touch = cfg.touch==undefined?true:cfg.touch;
+cfg.wptSfx = cfg.wptSfx==undefined?'':cfg.wptSfx; 
 
 if ( cfg.spdFilt ) var spdFilter = new KalmanFilter({R: 0.1 , Q: 1 });
 if ( cfg.altFilt ) var altFilter = new KalmanFilter({R: 0.01, Q: 2 });
diff --git a/apps/speedalt2/metadata.json b/apps/speedalt2/metadata.json
index 4ace46854..0de0b28bb 100644
--- a/apps/speedalt2/metadata.json
+++ b/apps/speedalt2/metadata.json
@@ -2,7 +2,7 @@
   "id": "speedalt2",
   "name": "GPS Adventure Sports II",
   "shortName":"GPS Adv Sport II",
-  "version":"1.49",
+  "version":"1.50",
   "description": "GPS speed, altitude and distance to waypoint display. Designed for easy viewing and use during outdoor activities such as para-gliding, hang-gliding, sailing, cycling etc.",
   "icon": "app.png",
   "type": "app",
@@ -15,5 +15,10 @@
     {"name":"speedalt2.img","url":"app-icon.js","evaluate":true},
     {"name":"speedalt2.settings.js","url":"settings.js"}
   ],
-  "data": [{"name":"speedalt2.json"}]
+  "data": [
+    {"name":"speedalt2.json"},
+    {"name":"waypoints1.json"},
+    {"name":"waypoints2.json"},
+    {"name":"waypoints3.json"}
+  ]
 }
diff --git a/apps/speedalt2/settings.js b/apps/speedalt2/settings.js
index babb03061..1bdb58f9d 100644
--- a/apps/speedalt2/settings.js
+++ b/apps/speedalt2/settings.js
@@ -30,6 +30,11 @@
     writeSettings();
   }
 
+  function setSfx(s) {
+    settings.wptSfx = s;
+    writeSettings();
+  }
+
   
   const appMenu = {
     '': {'title': 'GPS Adv Sprt II'},
@@ -38,6 +43,7 @@
     'Units' : function() { E.showMenu(unitsMenu); },
     'Colours' : function() { E.showMenu(colMenu); },
     'Kalman Filter' : function() { E.showMenu(kalMenu); },
+    'Wpt File Suffix' : function() { E.showMenu(sfxMenu); },
     'Touch' : {
        value : settings.touch,
        format : v => v?"On":"Off",
@@ -69,6 +75,15 @@
     'Inverted' : function() { setColour(3); }
   };
   
+  const sfxMenu = {
+    '': {'title': 'Wpt File Suffix'},
+    '< Back': function() { E.showMenu(appMenu); },
+    'Default' : function() { setSfx(''); },
+    '1' : function() { setSfx('1'); },
+    '2' : function() { setSfx('2'); },
+    '3' : function() { setSfx('3'); }
+  };
+  
   const kalMenu = {
     '': {'title': 'Kalman Filter'},
     '< Back': function() { E.showMenu(appMenu); },