diff --git a/tests/conftest.py b/tests/conftest.py
index b13dc500a62..afcfb7b170e 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -147,6 +147,7 @@ def create(
         test,
         test_perf_signature,
         repository,
+        application='',
     ):
         return perf_models.PerformanceSignature.objects.create(
             repository=repository,
@@ -160,6 +161,7 @@ def create(
             extra_options=extra_options,
             last_updated=datetime.datetime.now(),
             measurement_unit=measurement_unit,
+            application=application,
         )
 
     return create
diff --git a/tests/webapp/api/test_perfcompare_api.py b/tests/webapp/api/test_perfcompare_api.py
index f30f949aa30..0e74bd6d384 100644
--- a/tests/webapp/api/test_perfcompare_api.py
+++ b/tests/webapp/api/test_perfcompare_api.py
@@ -39,6 +39,8 @@ def test_perfcompare_results_against_no_base(
     test = 'dhtml.html'
     extra_options = 'e10s fission stylo webrender'
     measurement_unit = 'ms'
+    base_application = 'firefox'
+    new_application = 'geckoview'
 
     base_sig = create_signature(
         signature_hash=(20 * 't1'),
@@ -49,6 +51,7 @@ def test_perfcompare_results_against_no_base(
         test=test,
         test_perf_signature=test_perf_signature,
         repository=try_repository,
+        application=base_application,
     )
 
     base_perf_data_values = [32.4]
@@ -77,6 +80,7 @@ def test_perfcompare_results_against_no_base(
         test=test,
         test_perf_signature=test_perf_signature,
         repository=test_repository,
+        application=new_application,
     )
 
     job = perf_jobs[1]
@@ -108,6 +112,8 @@ def test_perfcompare_results_against_no_base(
             'header_name': response['header_name'],
             'base_repository_name': base_sig.repository.name,
             'new_repository_name': new_sig.repository.name,
+            'base_app': 'firefox',
+            'new_app': 'geckoview',
             'is_complete': response['is_complete'],
             'base_measurement_unit': base_sig.measurement_unit,
             'new_measurement_unit': new_sig.measurement_unit,
@@ -188,6 +194,8 @@ def test_perfcompare_results_with_only_one_run_and_diff_repo(
     test = 'dhtml.html'
     extra_options = 'e10s fission stylo webrender'
     measurement_unit = 'ms'
+    base_application = 'firefox'
+    new_application = 'geckoview'
 
     base_sig = create_signature(
         signature_hash=(20 * 't1'),
@@ -198,6 +206,7 @@ def test_perfcompare_results_with_only_one_run_and_diff_repo(
         test=test,
         test_perf_signature=test_perf_signature,
         repository=try_repository,
+        application=base_application,
     )
 
     base_perf_data_values = [32.4]
@@ -226,6 +235,7 @@ def test_perfcompare_results_with_only_one_run_and_diff_repo(
         test=test,
         test_perf_signature=test_perf_signature,
         repository=test_repository,
+        application=new_application,
     )
 
     job = perf_jobs[1]
@@ -257,6 +267,8 @@ def test_perfcompare_results_with_only_one_run_and_diff_repo(
             'header_name': response['header_name'],
             'base_repository_name': base_sig.repository.name,
             'new_repository_name': new_sig.repository.name,
+            'base_app': 'firefox',
+            'new_app': 'geckoview',
             'is_complete': response['is_complete'],
             'base_measurement_unit': base_sig.measurement_unit,
             'new_measurement_unit': new_sig.measurement_unit,
@@ -413,6 +425,8 @@ def test_perfcompare_results_multiple_runs(
             'header_name': first_row['header_name'],
             'base_repository_name': sig1.repository.name,
             'new_repository_name': sig2.repository.name,
+            'base_app': '',
+            'new_app': '',
             'is_complete': first_row['is_complete'],
             'base_measurement_unit': sig1.measurement_unit,
             'new_measurement_unit': sig2.measurement_unit,
@@ -457,6 +471,8 @@ def test_perfcompare_results_multiple_runs(
             'header_name': second_row['header_name'],
             'base_repository_name': sig3.repository.name,
             'new_repository_name': sig4.repository.name,
+            'base_app': '',
+            'new_app': '',
             'is_complete': second_row['is_complete'],
             'base_measurement_unit': sig3.measurement_unit,
             'new_measurement_unit': sig4.measurement_unit,
diff --git a/treeherder/webapp/api/performance_data.py b/treeherder/webapp/api/performance_data.py
index 2cb00a609df..8c165a2b0a6 100644
--- a/treeherder/webapp/api/performance_data.py
+++ b/treeherder/webapp/api/performance_data.py
@@ -931,6 +931,8 @@ def list(self, request):
                     'new_rev': new_rev,
                     'header_name': header,
                     'platform': platform,
+                    'base_app': base_sig.get('application', ''),
+                    'new_app': new_sig.get('application', ''),
                     'suite': base_sig.get('suite', ''),  # same suite for base_result and new_result
                     'test': base_sig.get('test', ''),  # same test for base_result and new_result
                     'is_complete': is_complete,
@@ -1116,6 +1118,7 @@ def _get_signatures_values(signatures: List[PerformanceSignature]):
             'measurement_unit',
             'lower_is_better',
             'signature_hash',
+            'application',
         )
 
     @staticmethod
diff --git a/treeherder/webapp/api/performance_serializers.py b/treeherder/webapp/api/performance_serializers.py
index c48a056cf6d..93da0a70c4a 100644
--- a/treeherder/webapp/api/performance_serializers.py
+++ b/treeherder/webapp/api/performance_serializers.py
@@ -443,6 +443,14 @@ def validate(self, data):
 class PerfCompareResultsSerializer(serializers.ModelSerializer):
     base_rev = serializers.CharField()
     new_rev = serializers.CharField()
+    base_app = serializers.CharField(
+        max_length=10,
+        default='',
+    )
+    new_app = serializers.CharField(
+        max_length=10,
+        default='',
+    )
     is_empty = serializers.BooleanField()
     is_complete = serializers.BooleanField()
     platform = serializers.CharField()
@@ -489,6 +497,8 @@ class Meta:
         fields = [
             'base_rev',
             'new_rev',
+            'base_app',
+            'new_app',
             'framework_id',
             'platform',
             'suite',