diff --git a/caldav_sync/models/calendar_event.py b/caldav_sync/models/calendar_event.py
index 620abb0..a3a5ae8 100644
--- a/caldav_sync/models/calendar_event.py
+++ b/caldav_sync/models/calendar_event.py
@@ -458,6 +458,7 @@ class CalendarEvent(models.Model):
             partner = self.env["res.partner"].search(
                 [("email", "=", _extract_vcal_email(organizer))]
             )
+            # TODO: prioritize partner with a user if there is one
             return partner[0] if partner else partner  # partner[0] in case many matches
         else:
             return self.env["res.partner"]
diff --git a/customer_applications/__init__.py b/customer_applications/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/customer_applications/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/customer_applications/__manifest__.py b/customer_applications/__manifest__.py
new file mode 100644
index 0000000..54b25ef
--- /dev/null
+++ b/customer_applications/__manifest__.py
@@ -0,0 +1,33 @@
+#
+#    Bemade Inc.
+#
+#    Copyright (C) 2023-June Bemade Inc. (<https://www.bemade.org>).
+#    Author: Marc Durepos (Contact : marc@bemade.org)
+#
+#    This program is under the terms of the GNU Lesser General Public License,
+#    version 3.
+#
+#    For full license details, see https://www.gnu.org/licenses/lgpl-3.0.en.html.
+#
+#    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+#    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+#    DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+#    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#    DEALINGS IN THE SOFTWARE.
+#
+{
+    "name": "Customer Applications",
+    "version": "17.0.1.0.0",
+    "summary": "Adds the notion of applications to partners.",
+    "category": "Contacts",
+    "author": "Bemade Inc.",
+    "website": "http://www.bemade.org",
+    "license": "LGPL-3",
+    "depends": ["contacts", "incrementing_sequence_mixin"],
+    "data": [],
+    "assets": {},
+    "installable": True,
+    "auto_install": False,
+}
diff --git a/customer_applications/models/__init__.py b/customer_applications/models/__init__.py
new file mode 100644
index 0000000..dc2e897
--- /dev/null
+++ b/customer_applications/models/__init__.py
@@ -0,0 +1,3 @@
+from . import application
+from . import application_specification
+from . import application_type
diff --git a/customer_applications/models/application.py b/customer_applications/models/application.py
new file mode 100644
index 0000000..807caa7
--- /dev/null
+++ b/customer_applications/models/application.py
@@ -0,0 +1,34 @@
+from odoo import models, fields, Command
+
+
+class Application(models.Model):
+    _name = "partner.application"
+    _description = "Partner Application"
+    _inherit = ["mail.thread", "mail.activity.mixin"]
+
+    partner_id = fields.Many2one(
+        comodel_name="res.partner",
+        string="Location",
+        required=True,
+        tracking=1,
+        copy=False,
+    )
+    application_type_id = fields.Many2one(
+        comodel_name="partner.application.type",
+        required=True,
+        tracking=2,
+    )
+    specification_ids = fields.One2many(
+        comodel_name="partner.application.specification",
+        inverse_name="application_id",
+        tracking=3,
+    )
+
+    def copy(self, default=None):
+        self.ensure_one()  # This logic won't work for batches, and it doesn't need to
+        default = default or {}
+        if "specification_ids" not in default:
+            default["specification_ids"] = [
+                Command.create(line.copy_data()[0]) for line in self.specification_ids
+            ]
+        return super().copy(default)
diff --git a/customer_applications/models/application_specification.py b/customer_applications/models/application_specification.py
new file mode 100644
index 0000000..443177b
--- /dev/null
+++ b/customer_applications/models/application_specification.py
@@ -0,0 +1,20 @@
+from odoo import models, fields
+
+
+class PartnerApplicationSpecification(models.Model):
+    _name = "partner.application.specification"
+    _description = "Partner Application Specification"
+    _inherit = ["mail.thread", "mail.activity.mixin", "incrementing.sequence.mixin"]
+    _sequence_group = "application_id"
+
+    name = fields.Char(
+        tracking=2,
+        required=True,
+    )
+    value = fields.Text(
+        tracking=2,
+    )
+    application_id = fields.Many2one(
+        comodel_name="partner.application",
+        tracking=1,
+    )
diff --git a/customer_applications/models/application_type.py b/customer_applications/models/application_type.py
new file mode 100644
index 0000000..4c9300e
--- /dev/null
+++ b/customer_applications/models/application_type.py
@@ -0,0 +1,14 @@
+from odoo import models, fields
+
+
+class PartnerApplicationType(models.Model):
+    _name = "partner.application.type"
+    _description = "Partner Application Type"
+
+    _inherit = ["mail.thread", "mail.activity.mixin"]
+
+    name = fields.Char(
+        required=True,
+        tracking=1,
+    )
+    description = fields.Text(tracking=2)
diff --git a/customer_applications/tests/__init__.py b/customer_applications/tests/__init__.py
new file mode 100644
index 0000000..7abb9fe
--- /dev/null
+++ b/customer_applications/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_application
diff --git a/customer_applications/tests/test_application.py b/customer_applications/tests/test_application.py
new file mode 100644
index 0000000..8c3f77b
--- /dev/null
+++ b/customer_applications/tests/test_application.py
@@ -0,0 +1,59 @@
+from odoo.tests import TransactionCase
+
+
+class TestApplication(TransactionCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.partner_1, cls.partner_2 = cls.env["res.partner"].create(
+            [
+                {
+                    "name": "Test Partner",
+                },
+                {
+                    "name": "Test Partner 2",
+                },
+            ]
+        )
+        cls.application_type = cls.env["partner.application.type"].create(
+            {
+                "name": "application type",
+            }
+        )
+
+    def test_copy_correctly_creates_specification_lines(self):
+        application = self.env["partner.application"].create(
+            {
+                "partner_id": self.partner_1.id,
+                "application_type_id": self.application_type.id,
+            }
+        )
+        specifications = self.env["partner.application.specification"].create(
+            [
+                {
+                    "name": "Spec 1",
+                    "value": "Spec 1 value",
+                    "application_id": application.id,
+                },
+                {
+                    "name": "Spec 2",
+                    "value": "Spec 2 value",
+                    "application_id": application.id,
+                },
+            ]
+        )
+        application_copy = application.copy(
+            default={
+                "partner_id": self.partner_2.id,
+            }
+        )
+        self.assertEqual(len(application_copy.specification_ids), 2)
+        self.assertEqual(len(application.specification_ids), 2)
+        self.assertNotEqual(
+            application.specification_ids, application_copy.specification_ids
+        )
+
+        # TODO: move this to a test in the mixin module once we figure out how
+        #       to dynamically create and load models
+        self.assertEqual(specifications[0].sequence, 1)
+        self.assertEqual(specifications[1].sequence, 2)
diff --git a/incrementing_sequence_mixin/__init__.py b/incrementing_sequence_mixin/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/incrementing_sequence_mixin/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/incrementing_sequence_mixin/__manifest__.py b/incrementing_sequence_mixin/__manifest__.py
new file mode 100644
index 0000000..cd62f03
--- /dev/null
+++ b/incrementing_sequence_mixin/__manifest__.py
@@ -0,0 +1,45 @@
+#
+#    Bemade Inc.
+#
+#    Copyright (C) 2023-June Bemade Inc. (<https://www.bemade.org>).
+#    Author: Marc Durepos (Contact : marc@bemade.org)
+#
+#    This program is under the terms of the GNU Lesser General Public License,
+#    version 3.
+#
+#    For full license details, see https://www.gnu.org/licenses/lgpl-3.0.en.html.
+#
+#    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+#    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+#    DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+#    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#    DEALINGS IN THE SOFTWARE.
+#
+{
+    "name": "Incrementing Sequence Mixin",
+    "version": "17.0.1.0.0",
+    "summary": "Adds an incrementing.sequence.mixin model to inherit from.",
+    "description": """
+    Adds an incrementing.sequence.mixin model to inherit from. This model adds a
+    sequence field to the models that inherit from it, including the logic to set it to
+    the highest current sequence number + 1 by default and to leave it otherwise
+    changeable by the user (i.e. with a drag and drop via the handle).
+    
+    Specify the _sequence_group attribute on the model to indicate which field to use
+    to determine if records belong to the same group. For example, if one were to use
+    this on sale.order.line, they could specify "order_id" as the _sequence_group such
+    that newly created lines take on the highest sequence number of all lines on the
+    same sales order.
+    """,
+    "category": "",
+    "author": "Bemade Inc.",
+    "website": "http://www.bemade.org",
+    "license": "LGPL-3",
+    "depends": [],
+    "data": [],
+    "assets": {},
+    "installable": True,
+    "auto_install": False,
+}
diff --git a/incrementing_sequence_mixin/models/__init__.py b/incrementing_sequence_mixin/models/__init__.py
new file mode 100644
index 0000000..9dcaa0e
--- /dev/null
+++ b/incrementing_sequence_mixin/models/__init__.py
@@ -0,0 +1 @@
+from . import incrementing_sequence_mixin
diff --git a/incrementing_sequence_mixin/models/incrementing_sequence_mixin.py b/incrementing_sequence_mixin/models/incrementing_sequence_mixin.py
new file mode 100644
index 0000000..c1822f2
--- /dev/null
+++ b/incrementing_sequence_mixin/models/incrementing_sequence_mixin.py
@@ -0,0 +1,48 @@
+from odoo import models, fields, api
+
+
+class IncrementingSequenceMixin(models.AbstractModel):
+    _name = "incrementing.sequence.mixin"
+    _description = "Incrementing Sequence Mixin"
+    _order = "sequence, id asc"
+
+    def __init_subclass__(cls, **kwargs):
+        super().__init_subclass__(**kwargs)
+        if "incrementing.sequence.mixin" in cls._inherit:
+            if not hasattr(cls, "_sequence_group"):
+                raise ValueError(
+                    f"Model {cls._name} inheriting from incrementing.sequence.mixin must define a '_sequence_group' attribute."
+                )
+
+    sequence = fields.Integer()
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        res = super().create(vals_list)
+        for rec in res:
+            if rec.sequence == 0:
+                group_field = rec._sequence_group
+                group_field_data = getattr(rec, group_field)
+                if hasattr(group_field_data, "id"):
+                    group_field_data = group_field_data.id
+                group = self.env[rec._name].search(
+                    [(group_field, "=", group_field_data)]
+                )
+                max_seq = max(group.mapped("sequence")) if group else 0
+                rec.sequence = max_seq + 1
+        return res
+
+    def _default_sequence(self):
+        group_field = self._sequence_group
+        group_field_data = getattr(self, group_field)
+        if hasattr(group_field_data, "id"):
+            group_field_data = group_field_data.id
+        group = self.env[self._name].search([(group_field, "=", group_field_data)])
+        max_seq = max(group.mapped("sequence")) if group else 0
+        # Don't recalculate if already set
+        for rec in self.filtered(lambda r: r.sequence == 0):
+            max_seq += 1
+            rec.sequence = max_seq
+
+    def _inverse_sequence(self):
+        pass