Gain and loss are integers.

src/main/java/de/dennisguse/opentracks/adapters/IntervalStatisticsAdapter.java

@@ -59,8 +59,8 @@ public class IntervalStatisticsAdapter extends RecyclerView.Adapter<RecyclerView
 
         viewHolder.rate.setText(StringUtils.formatSpeed(context, interval.getSpeed(), metricUnits, isReportSpeed));
 
-        viewHolder.gain.setText(StringUtils.formatAltitude(context, interval.getGain_m(), metricUnits));
-        viewHolder.loss.setText(StringUtils.formatAltitude(context, interval.getLoss_m(), metricUnits));
+        viewHolder.gain.setText(StringUtils.formatAltitudeChange(context, interval.getGain_m(), metricUnits));
+        viewHolder.loss.setText(StringUtils.formatAltitudeChange(context, interval.getLoss_m(), metricUnits));
 
     }
 

src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java

@@ -243,11 +243,11 @@ public class StatisticsRecordedFragment extends Fragment {
 
             Pair<String, String> parts;
 
-            parts = StringUtils.getAltitudeParts(getContext(), altitudeGain_m, preferenceMetricUnits);
+            parts = StringUtils.getAltitudeChangeParts(getContext(), altitudeGain_m, preferenceMetricUnits);
             viewBinding.statsAltitudeGainValue.setText(parts.first);
             viewBinding.statsAltitudeGainUnit.setText(parts.second);
 
-            parts = StringUtils.getAltitudeParts(getContext(), altitudeLoss_m, preferenceMetricUnits);
+            parts = StringUtils.getAltitudeChangeParts(getContext(), altitudeLoss_m, preferenceMetricUnits);
             viewBinding.statsAltitudeLossValue.setText(parts.first);
             viewBinding.statsAltitudeLossUnit.setText(parts.second);
 

src/main/java/de/dennisguse/opentracks/io/file/exporter/SharePictureTrackExporter.java

@@ -66,7 +66,7 @@ public class SharePictureTrackExporter implements TrackExporter {
 
         viewBinding.sharePictureTotalTime.setText(StringUtils.formatElapsedTimeWithHour(track.getTrackStatistics().getTotalTime()));
         viewBinding.sharePictureTotalDistance.setText(StringUtils.formatDistance(context, track.getTrackStatistics().getTotalDistance(), metricUnits));
-        viewBinding.sharePictureGain.setText(StringUtils.formatAltitude(context, trackStatistics.getTotalAltitudeGain(), metricUnits));
+        viewBinding.sharePictureGain.setText(StringUtils.formatAltitudeChange(context, trackStatistics.getTotalAltitudeGain(), metricUnits));
 
         // prepare rendering
         View view = viewBinding.getRoot();

src/main/java/de/dennisguse/opentracks/util/StringUtils.java

@@ -341,6 +341,21 @@ public class StringUtils {
         return context.getString(R.string.altitude_with_unit, distanceParts.first, distanceParts.second);
     }
 
+    /**
+     * @return the formatted altitudeDifference_m (or null) and it's unit as {@link Pair}
+     */
+    public static Pair<String, String> getAltitudeChangeParts(Context context, Float altitudeDifference_m, boolean metricUnits) {
+        String formattedValue = altitudeDifference_m != null ? String.valueOf((int) Distance.of(altitudeDifference_m).toM_FT(metricUnits)) : context.getString(R.string.value_unknown);
+        String unit = context.getString(metricUnits ? R.string.unit_meter : R.string.unit_feet);
+        return new Pair<>(formattedValue, unit);
+    }
+
+    public static String formatAltitudeChange(Context context, Float altitude_m, boolean metricUnits) {
+        Pair<String, String> distanceParts = getAltitudeChangeParts(context, altitude_m, metricUnits);
+
+        return context.getString(R.string.altitude_with_unit, distanceParts.first, distanceParts.second);
+    }
+
     public static String valueInParentheses(String text) {
         return "(" + text + ")";
     }

src/main/java/de/dennisguse/opentracks/viewmodels/StatisticDataBuilder.java

@@ -84,10 +84,10 @@ public class StatisticDataBuilder {
             description = latestTrackPoint != null && latestTrackPoint.hasAltitude() ? context.getString(latestTrackPoint.getAltitude().getLabelId()) : null;
             valueAndUnit = StringUtils.getAltitudeParts(context, altitude, metricUnits);
         } else if (fieldKey.equals(context.getString(R.string.stats_custom_layout_gain_key))) {
-            valueAndUnit = StringUtils.getAltitudeParts(context, recordingData.getTrackStatistics().getTotalAltitudeGain(), metricUnits);
+            valueAndUnit = StringUtils.getAltitudeChangeParts(context, recordingData.getTrackStatistics().getTotalAltitudeGain(), metricUnits);
             title = context.getString(R.string.stats_gain);
         } else if (fieldKey.equals(context.getString(R.string.stats_custom_layout_loss_key))) {
-            valueAndUnit = StringUtils.getAltitudeParts(context, recordingData.getTrackStatistics().getTotalAltitudeLoss(), metricUnits);
+            valueAndUnit = StringUtils.getAltitudeChangeParts(context, recordingData.getTrackStatistics().getTotalAltitudeLoss(), metricUnits);
             title = context.getString(R.string.stats_loss);
         } else if (fieldKey.equals(context.getString(R.string.stats_custom_layout_coordinates_key))) {
             title = context.getString(R.string.stats_coordinates);