Try this:

mkdir Apps\newapp
python manage.py startapp NewApp Apps/newapp

And you will to create a app called “NewApp” inside folder “Apps/newapp”.

Create your Apps directory from your project’s root directory-

mkdir Apps

Move to your Apps directory-

cd Apps

Run python by calling the manage.py in your root project directory-

python ../manage.py startapp newapp

There you go

from the docs:

If the optional destination is provided, Django will use that existing directory rather than creating a new one. You can use ‘.’ to denote the current working directory.
django-admin.py startapp myapp /Users/jezdez/Code/myapp

So try python manage.py startapp myApp ./Apps/myApp or with the full path.

Manage.py file is a thin wrapper of django-admin.py

In case, you want to create a new app in any directory

Try this:

$ cd <directory path>
$ django-admin.py startapp <app-anme>

For django 3.2.9

Create a sub directory Apps to hold all the apps, move into it, create a directory for the app myApp, then come back to root directory

mkdir Apps && cd Apps && mkdir myApp && cd ..

add a __init__.py file (is a python way to treat a directory as a package)

Create a myApp inside Apps sub directory

manage.py startapp myApp Apps/myApp

(in windows, please use backslash)
above two lines of code will create myApp

Now, in settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    # Local
    'Apps.myApp.apps.MyAppConfig', # new
]

in ./Apps/myApp/apps.py file, change name='myApp' to name='Apps.myApp' will solve the issue

As the documentation says you can use the command

django-admin startapp name [directory]

but in the example

django-admin startapp myapp /Users/jezdez/myapp

the documentation does not say that python creates the myapp folder. You should do it before the startapp command.

For newer versions of Django

1. Create the required folder structure

mkdir -p apps/myapp && touch apps/__init__.py

2. Create the app

python manage.py startapp myapp apps/myapp

3. Configure the apps/myapp/apps.py file as follows:

from django.apps import AppConfig


class MyappConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'apps.myapp'

4. Append the app in the INSTALLED_APPS list at [project]/settings.py

INSTALLED_APPS = [
    ...
    'apps.myapp',
]

Tested on Django 4.2.3 🤖