Mobile Marketing: What are the best services to integrate in your  iOS app for push notifications?

I would recommend looking at StreamIn http://streamin.io/ It will enable your app to send notifications to its users through multiple delivery channels.Also take a look at partner program :)

Appoxee is a rock solid push messaging platform with an advanced feature set to optimize app engagement - including push notifications, in-app messages, personalized push, multi-app messaging, advanced targeting, message Inbox, customer feedback plug-in and a more. (Disclosure: I work for Appoxee). http://www.appoxee.com

Appoxee ; Urban Airship ; Xtify ; there are many, it really depends on your pocket and requirement. thing to notice is that some have better reporting system then others, meaning if you seek your developers advice; they might like one over the other due to easy installation; but when you login to look at the stats you might be suprised. Push notification is vital for any app, make sure the service you pick does the job. http://EZMob.com

I would suggest using http://qgraph.io for sending Push Notifications via iOS.  QGraph allows you to send dynamically personalize push notifications for each user based on her activity inside the App. It is possible to personalize text, image & deeplink for each user. We also offer advanced segmentation options allowing you to send targeted notifications.

If you are looking at the best service for your commerce app (if you have a cart in your app), then give http://www1.vizury.com/engageapp?utm_campaign=App+Marketing+BP+Guide&utm_medium=social&utm_source=quora a shot. It helps you send super personalized Push Notifications. In addition to the regular push notifications- with text and single image, we do Multi-product Push too- multiple products are shown as push notifications in a carousel. They are not static banners, they are dynamic- getting it directly from the product/ cart pages of the app. They are also deep linked with the app. You can watch a video on how it works here. The best part is, you can sync your Push notifications with Display ads- from a single platform. Now with iOS 10 update, you will be able to do Rich Push notifications on iPhones.Below is a set of Multi-product Push notifications that got 3x higher conversions compared to static Push.

I suggest to try out - http://api.shephertz.com/tutorial/Push-Notification-iOS/. Its a very comprehensive Push Service - cross-platform, campaigning, real-time/scheduling, analytics, personalized push, rich push, targeted push, location-based, channelizing. There is a lot! and best thing - 1mn pushes are free :)