diff --git a/.gitignore b/.gitignore
index 9ed7adab..5fe00639 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ pkg/*
 build/
 .DS_Store
 .repl_history
+provisioning
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 00000000..79a61441
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.4.4
diff --git a/Gemfile.lock b/Gemfile.lock
index 765cc595..fa0b179c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,14 +6,164 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    CFPropertyList (3.0.2)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    atomos (0.1.3)
+    babosa (1.0.3)
     bacon (1.2.0)
+    claide (1.0.3)
+    colored (1.2)
+    colored2 (3.1.2)
+    commander-fastlane (4.4.6)
+      highline (~> 1.7.2)
+    declarative (0.0.10)
+    declarative-option (0.1.0)
+    digest-crc (0.4.1)
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
+    dotenv (2.7.5)
+    emoji_regex (1.0.1)
+    excon (0.71.0)
+    faraday (0.17.1)
+      multipart-post (>= 1.2, < 3)
+    faraday-cookie_jar (0.0.6)
+      faraday (>= 0.7.4)
+      http-cookie (~> 1.0.0)
+    faraday_middleware (0.13.1)
+      faraday (>= 0.7.4, < 1.0)
+    fastimage (2.1.7)
+    fastlane (2.137.0)
+      CFPropertyList (>= 2.3, < 4.0.0)
+      addressable (>= 2.3, < 3.0.0)
+      babosa (>= 1.0.2, < 2.0.0)
+      bundler (>= 1.12.0, < 3.0.0)
+      colored
+      commander-fastlane (>= 4.4.6, < 5.0.0)
+      dotenv (>= 2.1.1, < 3.0.0)
+      emoji_regex (>= 0.1, < 2.0)
+      excon (>= 0.45.0, < 1.0.0)
+      faraday (~> 0.17)
+      faraday-cookie_jar (~> 0.0.6)
+      faraday_middleware (~> 0.13.1)
+      fastimage (>= 2.1.0, < 3.0.0)
+      gh_inspector (>= 1.1.2, < 2.0.0)
+      google-api-client (>= 0.21.2, < 0.24.0)
+      google-cloud-storage (>= 1.15.0, < 2.0.0)
+      highline (>= 1.7.2, < 2.0.0)
+      json (< 3.0.0)
+      jwt (~> 2.1.0)
+      mini_magick (>= 4.9.4, < 5.0.0)
+      multi_xml (~> 0.5)
+      multipart-post (~> 2.0.0)
+      plist (>= 3.1.0, < 4.0.0)
+      public_suffix (~> 2.0.0)
+      rubyzip (>= 1.3.0, < 2.0.0)
+      security (= 0.1.3)
+      simctl (~> 1.6.3)
+      slack-notifier (>= 2.0.0, < 3.0.0)
+      terminal-notifier (>= 2.0.0, < 3.0.0)
+      terminal-table (>= 1.4.5, < 2.0.0)
+      tty-screen (>= 0.6.3, < 1.0.0)
+      tty-spinner (>= 0.8.0, < 1.0.0)
+      word_wrap (~> 1.0.0)
+      xcodeproj (>= 1.8.1, < 2.0.0)
+      xcpretty (~> 0.3.0)
+      xcpretty-travis-formatter (>= 0.0.3)
+    gh_inspector (1.1.3)
+    google-api-client (0.23.9)
+      addressable (~> 2.5, >= 2.5.1)
+      googleauth (>= 0.5, < 0.7.0)
+      httpclient (>= 2.8.1, < 3.0)
+      mime-types (~> 3.0)
+      representable (~> 3.0)
+      retriable (>= 2.0, < 4.0)
+      signet (~> 0.9)
+    google-cloud-core (1.4.1)
+      google-cloud-env (~> 1.0)
+    google-cloud-env (1.3.0)
+      faraday (~> 0.11)
+    google-cloud-storage (1.16.0)
+      digest-crc (~> 0.4)
+      google-api-client (~> 0.23)
+      google-cloud-core (~> 1.2)
+      googleauth (>= 0.6.2, < 0.10.0)
+    googleauth (0.6.7)
+      faraday (~> 0.12)
+      jwt (>= 1.4, < 3.0)
+      memoist (~> 0.16)
+      multi_json (~> 1.11)
+      os (>= 0.9, < 2.0)
+      signet (~> 0.7)
+    highline (1.7.10)
+    http-cookie (1.0.3)
+      domain_name (~> 0.5)
+    httpclient (2.8.3)
+    json (2.3.0)
+    jwt (2.1.0)
+    memoist (0.16.2)
     metaclass (0.0.4)
+    mime-types (3.3)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2019.1009)
+    mini_magick (4.9.5)
     mocha (0.14.0)
       metaclass (~> 0.0.1)
-    mocha-on-bacon (0.2.2)
+    mocha-on-bacon (0.2.3)
       mocha (>= 0.13.0)
-    rake (10.4.2)
-    webstub (1.1.2)
+    motion-provisioning (1.0.2)
+      fastlane (~> 2.113)
+      highline (>= 1.7.2, < 2.0.0)
+    multi_json (1.14.1)
+    multi_xml (0.6.0)
+    multipart-post (2.0.0)
+    nanaimo (0.2.6)
+    naturally (2.2.0)
+    os (1.0.1)
+    plist (3.5.0)
+    public_suffix (2.0.5)
+    rake (10.5.0)
+    representable (3.0.4)
+      declarative (< 0.1.0)
+      declarative-option (< 0.2.0)
+      uber (< 0.2.0)
+    retriable (3.1.2)
+    rouge (2.0.7)
+    rubyzip (1.3.0)
+    security (0.1.3)
+    signet (0.12.0)
+      addressable (~> 2.3)
+      faraday (~> 0.9)
+      jwt (>= 1.5, < 3.0)
+      multi_json (~> 1.10)
+    simctl (1.6.6)
+      CFPropertyList
+      naturally
+    slack-notifier (2.3.2)
+    terminal-notifier (2.0.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    tty-cursor (0.7.0)
+    tty-screen (0.7.0)
+    tty-spinner (0.9.2)
+      tty-cursor (~> 0.7)
+    uber (0.1.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.6)
+    unicode-display_width (1.6.0)
+    webstub (1.1.6)
+    word_wrap (1.0.0)
+    xcodeproj (1.14.0)
+      CFPropertyList (>= 2.3.3, < 4.0)
+      atomos (~> 0.1.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.2.6)
+    xcpretty (0.3.0)
+      rouge (~> 2.0.7)
+    xcpretty-travis-formatter (1.0.0)
+      xcpretty (~> 0.2, >= 0.0.7)
 
 PLATFORMS
   ruby
@@ -23,6 +173,7 @@ DEPENDENCIES
   bubble-wrap!
   mocha (~> 0.11)
   mocha-on-bacon (~> 0.2)
+  motion-provisioning (~> 1.0.2)
   rake (~> 10.0)
   webstub (~> 1.1)
 
diff --git a/README.md b/README.md
index 0928f8bb..70eb3628 100644
--- a/README.md
+++ b/README.md
@@ -689,7 +689,11 @@ BW::Mail.compose(
   html: false,
   subject: "My Subject",
   message: "This is my message. It isn't very long.",
-  animated: false
+  animated: false,
+  attachments: [
+    {data: nsdata-object, mime_type: "mime/type", file_name: "file.name"},
+    ...
+  ]
 ) do |result, error|
   result.sent?      # => boolean
   result.canceled?  # => boolean
diff --git a/Rakefile b/Rakefile
index b33eb4cd..315af4b5 100644
--- a/Rakefile
+++ b/Rakefile
@@ -11,6 +11,7 @@ Bundler.require
 
 require 'bubble-wrap/all'
 require 'bubble-wrap/test'
+require 'motion-provisioning'
 
 module Motion
   module Project
@@ -36,6 +37,17 @@ Motion::Project::App.setup do |app|
     app.info_plist['NSLocationAlwaysUsageDescription'] = 'Description'
     app.info_plist['NSLocationWhenInUseUsageDescription'] = 'Description'
 
+    app.codesign_certificate = MotionProvisioning.certificate(
+      platform: :ios,
+      type: :development
+    )
+    app.provisioning_profile = MotionProvisioning.profile(
+      bundle_identifier: app.identifier,
+      app_name: app.name,
+      platform: :ios,
+      type: :development
+    )
+
     app.spec_files -= Dir.glob("./spec/motion/**/osx/**.rb")
   end
 
diff --git a/bubble-wrap.gemspec b/bubble-wrap.gemspec
index 0102907d..50d5440a 100644
--- a/bubble-wrap.gemspec
+++ b/bubble-wrap.gemspec
@@ -22,4 +22,5 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'bacon', '~> 1.2'
   gem.add_development_dependency 'rake', '~> 10.0'
   gem.add_development_dependency 'webstub', '~> 1.1'
+  gem.add_development_dependency 'motion-provisioning', '~> 1.0.2'
 end
diff --git a/motion/mail/mail.rb b/motion/mail/mail.rb
index d6d5fb15..e2632f21 100644
--- a/motion/mail/mail.rb
+++ b/motion/mail/mail.rb
@@ -14,7 +14,11 @@ module Mail
     #     html: false,
     #     subject: "My Subject",
     #     message: "This is my message. It isn't very long.",
-    #     animated: false
+    #     animated: false,
+    #     attachments: [ { data: nsdata-object1, mime_type: "xxx1/yyy1", file_name: "aaa1.bb1"},
+    #                    { data: nsdata-object2, mime_type: "xxx2/yyy2", file_name: "aaa2.bb2"},
+    #                    ...
+    #                   ]
     #   ) do |result, error|
     #     result.sent?      # => boolean
     #     result.canceled?  # => boolean
@@ -30,7 +34,8 @@ def compose(options = {}, &callback)
         to: [],
         cc: [],
         bcc: [],
-        subject: 'Contact'
+        subject: 'Contact',
+        attachments: []
       }.merge(options)
 
       @delegate = options[:delegate]
@@ -58,7 +63,9 @@ def create_mail_controller(options = {})
       mail_controller.setBccRecipients(Array(options[:bcc]))
       mail_controller.setSubject(options[:subject])
       mail_controller.setMessageBody(options[:message], isHTML: !!options[:html])
-
+      options[:attachments].each do |ad|
+        mail_controller.addAttachmentData(ad[:data], mimeType: ad[:mime_type], fileName: ad[:file_name])
+      end
       mail_controller
     end
 
diff --git a/spec/motion/mail/mail_spec.rb b/spec/motion/mail/mail_spec.rb
index e428fda0..b3b99255 100644
--- a/spec/motion/mail/mail_spec.rb
+++ b/spec/motion/mail/mail_spec.rb
@@ -12,7 +12,7 @@ def presentViewController(modal, animated: animated, completion: completion)
 # This of course breaks MFMailComposeViewController from actually working,
 # but it's testable.
 class MFMailComposeViewController
-  attr_accessor :toRecipients, :ccRecipients, :bccRecipients, :subject, :message, :html
+  attr_accessor :toRecipients, :ccRecipients, :bccRecipients, :subject, :message, :html, :attachments
 
   def setToRecipients(r)
     self.toRecipients = r
@@ -34,6 +34,14 @@ def setMessageBody(message, isHTML: html)
     self.message = message
     self.html = html
   end
+
+  def addAttachmentData(d, mimeType: mt, fileName: fn)
+    if self.attachments == nil
+      self.attachments = []
+    end
+    self.attachments << {:data => d, :mime_type => mt, :file_name => fn}
+  end
+
 end
 
 describe BW::Mail do
@@ -48,7 +56,12 @@ def setMessageBody(message, isHTML: html)
         html: false,
         subject: "My Subject",
         message: "This is my message. It isn't very long.",
-        animated: false
+        animated: false,
+        attachments: [
+          {data: "mock dataset A", mime_type: "mock/typeA", file_name: "mock_name_A"},
+          {data: "mock dataset B", mime_type: "mock/typeB", file_name: "mock_name_B"},
+          {data: "mock dataset C", mime_type: "mock/typeC", file_name: "mock_name_C"},
+        ]
       }
     end
 
@@ -118,6 +131,7 @@ def setMessageBody(message, isHTML: html)
         BubbleWrap::Mail.compose @standard_mail_options
       end
 
+
       it "should create a mail controller with the right animation" do
         @view_controller.expectation = lambda { |mail_controller, animated|
           animated.should.be.false
@@ -125,6 +139,54 @@ def setMessageBody(message, isHTML: html)
 
         BubbleWrap::Mail.compose @standard_mail_options
       end
+
+      it "should create a mail controller with an array of attachments" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.should.be.kind_of(Array)
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
+
+      it "should create a mail controller with the right number of attachments" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.size.should == 3
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
+
+      it "should create a mail controller with several attachments, the first of which is a hash of attachments" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.first.should.be.kind_of(Hash)
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
+
+      it "should create a mail controller with several attachments, the last of which has 3 keys" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.last.keys.size.should == 3
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
+
+      it "should create a mail controller with several attachments, the last of which has a first key :data" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.last.keys.first.should == :data
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
+
+      it "should create a mail controller with several attachments, the second of which has the expected mime-type" do
+        @view_controller.expectation = lambda { |mail_controller, animated|
+          mail_controller.attachments.first[:mime_type] == "mock/typeA"
+        }
+
+        BubbleWrap::Mail.compose @standard_mail_options
+      end
     end
 
   end