iOS 

Although many developers love the automatic management of provisioning profiles and certificate signing, Xcode 9 has reintroduced the option to manually manage this, useful for larger development teams with complicated continuous integration setups. Here’s everything you need to know about manual provisioning in Xcode 9.

You’ve heard about the Swift Source Compatibility Test Suite, right? Jesse Squires explains why you should add your projects to the suite, and how to do it. 

In Swift Enums and UITableView Sections, you’ll see how easy it can be to manage table data by leveraging Enums. 

There are a few changes to location permissions in iOS 11. Here are some tips on how to Avoid the Blue Bar of Shame.

If you’re using CoreData, you really should check this four part series on CRUD With Concurrency in Swift.

Some projects to check out: 

• awesome-arkit: A curated list of awesome ARKit projects and resources.
• ChainPageCollectionView: A custom View with fancy collectionView animation. 
• HGPlaceholders: Nice library to show placeholders for any UITableView in your project.
• Disk: A delightful framework for iOS to easily persist structs, images, and data.

Android

Tired of hearing all the Kotlin buzz, but finding it’s difficult to ignore? Then read Kotlin for grumpy Java developers. 

In the latest part in this series of dev tips, learn how the tools:parentTag attribute can help when you’re designing views. 

Get a handle on how to use RecyclerView in MVP as a passive view in this article. It shows how you shouldn’t store the data in the adapter itself.  

Now that Android Studio 3.0 has proper support for it, you can Embrace Java 8 Language Features in your app, without needing RetroLambda or Jack.

A lot of people dislike the hamburger menu, but it still has in place in app design. Here are some examples of When To Use a Hamburger Menu.

Some projects to check out: 

• SuperCalendar: Impressive calendar view for your apps.
• FileListerDialog: Helps you to list and pick files or directories. 
• UberCarAnimation: A demo app showing movement of a car on a map like Uber.
• BreadcrumbsView: Material Design breadcrumbs navigation widget.

General

Here’s an interesting article outlining When Friction in Design is Good for UX, such as when it prevents the user from making bad decisions. 

If you want to get serious about design in your team, check out this Design System Grammar. 

Finally, do you force quit your apps in iOS? John Gruber explains why it’s pointless.