diff --git a/nimbleclient/__init__.py b/nimbleclient/__init__.py
index cea4b68..a5800c7 100644
--- a/nimbleclient/__init__.py
+++ b/nimbleclient/__init__.py
@@ -12,7 +12,7 @@
 )
 
 # Version for NimbleOS SDK client package
-__version__ = "2.0.0"
+__version__ = "1.2.1"
 
 __all__ = [
     "v1",
diff --git a/nimbleclient/v1/client.py b/nimbleclient/v1/client.py
index 3453732..8861c63 100644
--- a/nimbleclient/v1/client.py
+++ b/nimbleclient/v1/client.py
@@ -59,8 +59,8 @@
 class NimOSClient:
     """Nimble client for NimOS v1 REST API."""
 
-    def __init__(self, hostname, username, password, job_timeout=60, port=5392):
-        self._client = NimOSAPIClient(hostname, username, password, job_timeout, port)
+    def __init__(self, hostname, username, password, app_name=None, job_timeout=60, port=5392):
+        self._client = NimOSAPIClient(hostname, username, password, app_name, job_timeout, port)
 
     @property
     def access_control_records(self):
diff --git a/nimbleclient/v1/restclient.py b/nimbleclient/v1/restclient.py
index 26a5c81..23e28e3 100644
--- a/nimbleclient/v1/restclient.py
+++ b/nimbleclient/v1/restclient.py
@@ -76,7 +76,7 @@ class NimOSAPIClient:
         'witnesses': 'v1/witnesses',
     }
 
-    def __init__(self, hostname, username, password, job_timeout=60, port=5392):
+    def __init__(self, hostname, username, password, app_name=None, job_timeout=60, port=5392):
         """Initialize a session to the NimOS REST API."""
 
         connection_hash = str(uuid.uuid3(uuid.NAMESPACE_OID, f'{hostname}{port}{username}{password}'))
@@ -85,11 +85,18 @@ def __init__(self, hostname, username, password, job_timeout=60, port=5392):
         self.port = port
         self.job_timeout = job_timeout
 
+        if app_name is None:
+            self.app_info = f'NimOS Python SDK v{__version__}'
+        else:
+            self.app_info = app_name
+
+        logging.debug(f"Instantiating NimOS client for App '{self.app_info}'")
+
         self.__auth = {
             'data': {
                 'username': username,
                 'password': password,
-                'app_name': f'NimOS Python SDK v{__version__}'
+                'app_name': self.app_info
             }
         }
         logging.debug(f"NimOSAPIClient created with [hostname: {hostname}], [job_timeout: {job_timeout} seconds], [port: {port}], [SDK Version: v{__version__}]")