diff --git a/contrib/AutoGrouper.lua b/contrib/AutoGrouper.lua
new file mode 100644
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--- /dev/null
+++ b/contrib/AutoGrouper.lua
@@ -0,0 +1,155 @@
+--[[AutoGrouper plugin for darktable
+
+  copyright (c) 2019  Kevin Ertel
+  
+  darktable is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+  
+  darktable is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+]]
+
+--[[About this Plugin
+This plugin adds the module "Auto Group" to darktable's lighttable view
+
+----REQUIRED SOFTWARE----
+None
+
+----USAGE----
+Install: (see here for more detail: https://github.com/darktable-org/lua-scripts )
+ 1) Copy this file in to your "lua/contrib" folder where all other scripts reside. 
+ 2) Require this file in your luarc file, as with any other dt plug-in
+
+Set a gap amount in second which will be used to determine when images should no 
+longer be added to a group. If an image is more then the specified amount of time
+from the last image in the group it will not be added. Images without timestamps 
+in exif data will be ignored.
+
+There are two buttons. One allows the grouping to be performed only on the currently
+selected images, the other button performs grouping on the entire active collection
+]]
+
+local dt = require "darktable"
+local mod = 'autogroup'
+local gettext = dt.gettext
+-- Tell gettext where to find the .mo file translating messages for a particular domain
+gettext.bindtextdomain("AutoGrouper",dt.configuration.config_dir.."/lua/locale/")
+local function _(msgid)
+    return gettext.dgettext("AutoGrouper", msgid)
+end
+
+local function InRange(test, low, high) --tests if test value is within range of low and high (inclusive)
+	if test >= low and test <= high then
+		return true
+	else
+		return false
+	end
+end
+
+local function CompTime(first, second)
+	first_time = first.exif_datetime_taken
+	if string.match(first_time, '[0-9]') == nil then first_time = '9999:99:99 99:99:99' end
+	first_time = tonumber(string.gsub(first_time, '[^0-9]*',''))
+	second_time = second.exif_datetime_taken
+	if string.match(second_time, '[0-9]') == nil then second_time = '9999:99:99 99:99:99' end
+	second_time = tonumber(string.gsub(second_time, '[^0-9]*',''))
+	return first_time < second_time
+end
+
+local function SeperateTime(str)
+	local cleaned = string.gsub(str, '[^%d]',':')
+	cleaned = string.gsub(cleaned, '::*',':')  --YYYY:MM:DD:hh:mm:ss
+	local year = string.sub(cleaned,1,4)
+	local month = string.sub(cleaned,6,7)
+	local day = string.sub(cleaned,9,10)
+	local hour = string.sub(cleaned,12,13)
+	local min = string.sub(cleaned,15,16)
+	local sec = string.sub(cleaned,18,19)
+	return {year = year, month = month, day = day, hour = hour, min = min, sec = sec}
+end
+
+local function GetTimeDiff(curr_image, prev_image)
+	local curr_time = SeperateTime(curr_image.exif_datetime_taken)
+	local prev_time = SeperateTime(prev_image.exif_datetime_taken)
+	return os.time(curr_time)-os.time(prev_time)
+end
+
+local function main(on_collection)
+	local images = {}
+	if on_collection then 
+		local col_images = dt.collection
+		for i,image in ipairs(col_images) do --copy images to a standard table, table.sort barfs on type dt_lua_singleton_image_collection
+			table.insert(images,i,image)
+		end
+	else
+		images = dt.gui.selection()
+	end
+	dt.preferences.write(mod, 'active_gap', 'integer', GUI.gap.value)
+	if #images < 2 then return end
+	table.sort(images, function(first, second) return CompTime(first,second) end)  --sort images into 
+	
+	for i, image in ipairs(images) do
+		if i == 1 then 
+			prev_image = image
+		elseif string.match(image.exif_datetime_taken, '[%d]') ~= nil then
+			local curr_image = image
+			if GetTimeDiff(curr_image, prev_image) < GUI.gap.value then
+				images[i]:group_with(images[i-1])
+			end
+			prev_image = curr_image
+		end
+	end
+end
+
+-- GUI --
+GUI = {
+	gap = 			{},
+	selected = 		{},
+	collection = 	{}
+}
+temp = dt.preferences.read(mod, 'active_gap', 'integer')
+if not InRange(temp, 1, 3600) then temp = 3 end
+GUI.gap = dt.new_widget('slider'){
+	label = _('group gap [sec.]'),
+	tooltip = _('minimum gap, in seconds, between groups'),
+	soft_min = 1,
+	soft_max = 30,
+	hard_min = 1,
+	hard_max = 3600,
+	step = 1,
+	digits = 0,
+	value = temp,
+	reset_callback = function(self) 
+		self.value = 3
+	end
+}
+GUI.selected = dt.new_widget("button"){
+	label = _('auto group: selected'),
+	tooltip =_('auto group selected images'),
+	clicked_callback = function() main(false) end
+}
+GUI.collection = dt.new_widget("button"){
+	label = _('auto group: collection'),
+	tooltip =_('auto group the entire collection'),
+	clicked_callback = function() main(true) end
+}
+dt.register_lib(
+	"AutoGroup_Lib",	-- Module name
+	_("Auto Group"),	-- name
+	true,	-- expandable
+	true,	-- resetable
+	{[dt.gui.views.lighttable] = {"DT_UI_CONTAINER_PANEL_RIGHT_CENTER", 99}},	-- containers
+	dt.new_widget("box"){
+		orientation = "vertical",
+		GUI.gap,
+		GUI.selected,
+		GUI.collection
+		}
+)