The document discusses the significance of push notifications in mobile applications, highlighting that users who opt in to receive them tend to engage more with the app. It outlines best practices for implementing push notifications, addressing user segmentation, engagement automation, and the importance of personalized content. Additionally, it emphasizes the need for proper device registration and management, as well as strategies for analyzing user feedback and improving engagement.

2. PETR DVOŘÁK
CEO at Lime

3. Push notifications.
The big way.

4. Should be part of every app.
Are not part of every app.
Are simple when done simple.
Mostly, they are pretty hard.
Push notifications

5. Why?

6. Users who opt in to push messages averaged 3x more
app launches than those who opted out.
— Localytics

7. 65% of users returned to an app in the 30 days after
the app’s initial download, if they have push enabled.
— Localytics

8. Forced social login
Privacy concerns
Intrusive ads
Bad UI/UX
Freezing
Complex sign-up
Annoying notifications
0 20 40 60 80
71%
68%
48%
42%
29%
23%
19%
Top 7 reasons why people uninstall mobile apps
Source: Appiterate Survey, as % of all respondent (each respondent picked 3 reasons)

9. Personalized and relevant content.
Delivered in the right time.
Spamming users results in uninstalls.
Test, measure, improve.
Automate engagement.
When it works?

10. Utility & Finance
Taxi & Ride sharing
Travel & Hospitality
Sport
Food & Beverage
Media
Social
Retail & e-commerce
0 10 20 30 40
11%
13%
19%
25%
26%
29%
30%
40%
Push notification engagement by industry
Source: Kahuna

11. In 2015, 49.8% of app users opted in to receiving
push notifications. In 2014, it was 52.0%.
— Localytics

13. Implementation topics

14. APNs / GCM
Provider

15. 1. Register device at APNs and provider.
2. Identify (or segment) users.
3. Send push notifications.
4. Analyze data.
5. Remove unused devices.
What needs to be done?

16. Device registration

17. Registration
APNs
Provider
1. Ask for APNs token.

18. Registration
APNs
Provider
1. Ask for APNs token.
2. Get APNs token

19. Registration
APNs
Provider
1. Ask for APNs token.
2. Get APNs token
3. Send APNs token to provider

20. APNs token
User identifier
Push notification settings
User demographics
User location
… and much more :-)
Data sent to provider

21. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType types = UIUserNotificationTypeBadge |
UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *set =
[UIUserNotificationSettings settingsForTypes:types
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:set];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
AppDelegate.m
Register for remote notifications

22. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType types = UIUserNotificationTypeBadge |
UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *set =
[UIUserNotificationSettings settingsForTypes:types
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:set];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
AppDelegate.m
Register for remote notifications

23. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType types = UIUserNotificationTypeBadge |
UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *set =
[UIUserNotificationSettings settingsForTypes:types
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:set];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
AppDelegate.m
Register for remote notifications

24. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType types = UIUserNotificationTypeBadge |
UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *set =
[UIUserNotificationSettings settingsForTypes:types
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:set];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
AppDelegate.m
Register for remote notifications

25. - (void)application:(UIApplication *)app
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken {
self.registered = YES;
[self sendProviderDeviceToken:devToken]; // custom method
}
- (void)application:(UIApplication *)app
didFailToRegisterForRemoteNotificationsWithError:(NSError *)err {
NSLog(@"Error in registration. Error: %@", err);
}
AppDelegate.m
Register for remote notifications

26. - (void)application:(UIApplication *)app
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken {
self.registered = YES;
[self sendProviderDeviceToken:devToken]; // custom method
}
- (void)application:(UIApplication *)app
didFailToRegisterForRemoteNotificationsWithError:(NSError *)err {
NSLog(@"Error in registration. Error: %@", err);
}
AppDelegate.m
Register for remote notifications

27. Sending notifications

28. Send push notifications
APNs
Provider
1. Decide to send push

29. Send push notifications
APNs
Provider
1. Decide to send push
2. Send payload and APNs token

30. Send push notifications
APNs
Provider
1. Decide to send push
2. Send payload and APNs token
3. Deliver the push message

31. Push notification payload
{
"aps" : {
"alert" : {
"title" : "Hello there!",
"body" : "It has been a while."
}
}
}
Maximum payload length is 4096 bytes.

32. Ehm… security?

33. Ehm… security?
Push Certifikát (*.pem, *.p12)

37. $ openssl pkcs12 -in apns-dev-cert.p12
-out apns-dev-cert.pem -nodes -clcerts

38. Ehm… security?
Push Certifikát (*.pem, *.p12)

39. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

40. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

41. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

42. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

43. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

44. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$devices = new DeviceCollection(array(
new Device('???????')
));
$message = new Message('Hello guys!');
$push = new Push($apnsAdapter, $devices, $message);
$pushManager->add($push);
$pushManager->push();
Send push notifications

45. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *localNotif =
launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
NSDictionary *userInfo = localNotif.userInfo;
}
- (void) application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
}
Handle push notifications

46. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *localNotif =
launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
NSDictionary *userInfo = localNotif.userInfo;
}
- (void) application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
}
Handle push notifications

47. - (BOOL)application:(UIApplication *)app
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *localNotif =
launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
NSDictionary *userInfo = localNotif.userInfo;
}
- (void) application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
}
Handle push notifications

48. Feedback service

49. Feedback service
APNs
Provider
1. Request expired tokens

50. Feedback service
APNs
Provider
1. Request expired tokens
2. Expired token list

51. Feedback service
APNs
Provider
1. Request expired tokens
2. Expired token list
3. Delete tokens

52. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$feedback = $pushManager->getFeedback($apnsAdapter);
// $feedback contains collection of [device_token, timestamp] pairs
Clean up device tokens

53. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$feedback = $pushManager->getFeedback($apnsAdapter);
// $feedback contains collection of [device_token, timestamp] pairs
Clean up device tokens

54. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$feedback = $pushManager->getFeedback($apnsAdapter);
// $feedback contains collection of [device_token, timestamp] pairs
Clean up device tokens

55. $pushManager = new PushManager(PushManager::ENVIRONMENT_DEV);
$apnsAdapter = new ApnsAdapter(array(
'certificate' => '/path/to/your/apns-certificate.pem',
));
$feedback = $pushManager->getFeedback($apnsAdapter);
// $feedback contains collection of [device_token, timestamp] pairs
Clean up device tokens

56. Silent push notifcation
Interactive actions
Localization
Badge number
Custom sound
Extras

57. Scaling big

58. User management - fast segmentation… by what?
Delivery time - 100k devices x 4096 … 1M devices?
Multiple apps - Reusing the push server
Hardware and infrastructure
Engineering - project grows big, multiple platforms
Dimensions of scaling

59. APNS / GCM
Provider

60. APNs
Provider
(business logic)
GCM
SDK SDK
App Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
APNS Node GCM Node

61. APNs
Provider
(business logic)
App Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
GCM
APNS Node GCM Node
SDK SDK

62. APNs
Provider
(business logic)
GCM
SDK SDK
APP KEY
App Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
APNS Node GCM Node
APP KEYAPP KEY

63. 1. Create campaign object
2. Select the audience
3. Send notifications
4. Collect analytics
Campaign planning

64. APNs
Provider
(business logic)
GCM
SDK SDK
App Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
APNS Node GCM Node

65. APNs
Provider
(business logic)
GCM
SDK SDK
App Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
APNS Node GCM Node

66. APNs
Provider
(business logic)
GCM
SDK SDKApp Management Service
Device Registration Service
User Segmentation Service
Analytics Data Service
MongoDBMongoDBMongoDB
APNS Node GCM Node
N instances
Partitioning

67. APNs GCM
SDK SDK
API, admin, workers

68. IBM Bluemix - price, HW scaling, connectivity, …
MongoDB - performance, queries, … (Compose)
Node.js - for “nodes”, speed, efficiency, …
RESTful API - standards, easy to work with, … (PHP, Nette)
Server Technologies

69. Device registration
Push notification processing
UI Features
User profile synchronization
Location monitoring
Analytics
Mobile SDK

70. - (BOOL)application:(UIApplication *)app didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions {
LimeEngate *lime = [LimeEngage sharedInstance];
[lime startFetchingContextForApplicationKey:@“app_8cb31c49a46df1fea11"];
[lime handleRemoteNotificationInfo:[launchOptions
objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey]];
return YES;
}
Set up SDK

71. - (BOOL)application:(UIApplication *)app didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions {
LimeEngate *lime = [LimeEngage sharedInstance];
[lime startFetchingContextForApplicationKey:@"app_8cb31c49a46df1fea11"];
[lime handleRemoteNotificationInfo:[launchOptions
objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey]];
return YES;
}
Set up SDK

72. - (BOOL)application:(UIApplication *)app didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions {
LimeEngate *lime = [LimeEngage sharedInstance];
[lime startFetchingContextForApplicationKey:@"app_8cb31c49a46df1fea11"];
[lime handleRemoteNotificationInfo:[launchOptions
objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey]];
return YES;
}
Handle notifications

73. - (void) application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
LimeEngage *lime = [LimeEngage sharedInstance];
[lime handleRemoteNotificationInfo:userInfo];
}
Handle notifications

74. - (void) application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
LimeEngage *lime = [LimeEngage sharedInstance];
[lime handleRemoteNotificationInfo:userInfo];
}
Handle notifications

75. LimeEngage *lime = [LimeEngage sharedInstance];
lime.currentUser.internalId = @"4378924";
lime.currentUser.name = @"Jan";
lime.currentUser.surname = @"Novak";
lime.currentUser.sex = @"male";
[lime synchronizeCurrentUser];
Update user info

76. LimeEngage *lime = [LimeEngage sharedInstance];
lime.currentUser.internalId = @"4378924";
lime.currentUser.name = @"Jan";
lime.currentUser.surname = @"Novak";
lime.currentUser.sex = @"male";
[lime synchronizeCurrentUser];
Update user info

77. Demo

78. Open-source
04/2016

79. Thank you! :)
@joshis_tweets http://getlime.io/

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