Apple today updated its TestFlight beta testing platform and app for iOS to add support for upcoming iOS 9 and watchOS 2 features, letting developers begin internal testing on beta features through Apple's official app testing platform.

iOS 9 and watchOS 2 introduce a range of new features that will improve apps on both the Apple Watch and the iPhone. With iOS 9 support for TestFlight, developers can now begin experimenting with features like App Thinning, which optimizes apps for specific devices to cut down on install size.

With App Thinning enabled, apps will install faster, launch faster, and will take up less space on a device. An iPhone app, for example, won't need to download unnecessary content designed for the iPad.

testwatchos2appthinning
watchOS 2 support in TestFlight means developers can begin installing and working with the first native apps for the Apple Watch. Native apps are run entirely on the Apple Watch and should speed up app launch times and performance.

Today's update does not include support for the external testing of iOS 9 and watchOS 2 apps, which means developers cannot yet provide apps with iOS 9 and watchOS 2 features to external beta test groups.

This update adds support for testing upcoming iOS 9 features -- including watchOS 2 apps and App Thinning.

Testers can now choose how to receive update notifications for each app they are testing. Also, watchOS 2 beta apps will install automatically when the "Automatic Downloads" setting is turned on in the Apple Watch app.

For those unfamiliar with TestFlight, it's Apple's iOS beta testing platform, designed to let developers recruit beta testers for their apps to work out bugs ahead of releasing apps to the public. Apple acquired TestFlight from Burstly in February of 2014 and relaunched the service alongside iOS 8 as an iOS-integrated testing platform.

TestFlight can be downloaded from the App Store for free. [Direct Link]

Top Rated Comments

oneMadRssn Avatar
132 months ago
That icon kind of reminds me of the old Geocities under contruction GIFs.





Score: 4 Votes (Like | Disagree)
KALLT Avatar
132 months ago
I am really looking forward to app thinning. I hope that developers will embrace it and Apple makes sure that apps benefit from it a bit even when the developers don’t care.
Score: 3 Votes (Like | Disagree)
Pupi Avatar
132 months ago
That icon kind of reminds me of the old Geocities under contruction GIFs.





TBH I don’t see it because it’s not referencing any under construction imagery, it’s a human-purpose tape measure around a taller app icon, denoting app thinning. Very smart.
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 26 on iPhone Feature

Here's When iOS 26 Rolls Out Today in Every Time Zone [Update: Out Now!]

Monday September 15, 2025 12:00 am PDT by
Update 10:06 a.m.: iOS 26 is rolling out now, though it may take a bit for all users to see it, so keep checking! Today's the day! Apple is about to release iOS 26, which will deliver the biggest redesign since iOS 7 and bring a range of new features and improvements to iPhones worldwide. It's Apple's biggest software update of the year, and Apple announced at last week's iPhone event that...
Tim Cook Rainbow

Apple Reportedly Plans to Launch These 10 Products in 'Coming Months'

Sunday September 14, 2025 8:45 am PDT by
Apple's annual September event is now in the rearview mirror, with the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, Apple Watch Series 11, Apple Watch Ultra 3, Apple Watch SE 3, and AirPods Pro 3 set to launch this Friday, September 19. As always, there is more to come. In his Power On newsletter today, Bloomberg's Mark Gurman said Apple plans to release many products in the...
iOS 26 Battery Glass Feature

Apple Says Installing iOS 26 Might Impact Battery Life

Monday September 15, 2025 10:56 am PDT by
In the iOS 26 release notes, Apple is warning iPhone users that installing the new software might have a temporary impact on battery life, which is normal. A new support document explains that major iOS updates require background setup like indexing data and files for search, downloading new assets, and updating apps. Further, Apple says that new features could require more resources,...
apple n1 chip

Apple's New N1 Chip in iPhone 17, iPhone 17 Pro, and iPhone Air Has a Wi-Fi 7 Limitation

Saturday September 13, 2025 10:01 am PDT by
The latest iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air models are equipped with Apple's all-new N1 chip for Wi-Fi 7, Bluetooth 6, and Thread connectivity. However, the chip has a Wi-Fi 7 bandwidth limitation. According to FCC documents reviewed by MacRumors, the N1 chip in all of the new iPhone models supports up to 160 MHz channel bandwidth for Wi-Fi 7, short of the...
iphone 17 lineup

iPhone 17 Models Launch on September 19 With These New Features

Friday September 12, 2025 7:58 am PDT by
Apple will launch its new iPhone 17 lineup and ultra-thin iPhone Air in stores on Friday, September 19, and the company has already shown off the new devices at its fall event, which ran with the the tagline "Awe dropping." The iPhone 17 series brings a host of new features and enhancements. Here's a rundown of the biggest upgrades and changes: iPhone 17 Display Changes The iPhone...
AirPods Pro Firmware Feature

AirPods Pro 2 and AirPods 4 Get iOS 26 Features With New Firmware Update

Monday September 15, 2025 10:50 am PDT by
Apple today released updated firmware for the AirPods Pro 2 and the AirPods 4, introducing support for the new AirPods features that are included in iOS 26, iPadOS 26, and macOS Tahoe. The firmware has a build number of 8A356, and it replaces the current 7E93 firmware. With Apple's new software updates, the AirPods Pro 2 and the AirPods 4 support better audio quality for phone calls and...
iPhone 17 Pro Air Boxes

iPhone Air and iPhone 17 Pro Boxes Revealed

Sunday September 14, 2025 1:36 pm PDT by
T-Mobile President Jon Freier today shared real-world photos of Apple's boxes for the iPhone Air, iPhone 17 Pro, and iPhone 17 models, which launch on Friday. Image Credit: Jon Freier Apple has typically included iPhone box renders in its product environmental reports, but it did not do so for the latest models. However, Apple's iPhone Upgrade Program page does offer some images of the boxes, ...