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
135 months ago
That icon kind of reminds me of the old Geocities under contruction GIFs.





Score: 4 Votes (Like | Disagree)
KALLT Avatar
135 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
135 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

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
ive and altman

Jony Ive's OpenAI Device Barred From Using 'io' Name

Friday December 5, 2025 6:22 am PST by
A U.S. appeals court has upheld a temporary restraining order that prevents OpenAI and Jony Ive's new hardware venture from using the name "io" for products similar to those planned by AI audio startup iyO, Bloomberg Law reports. iyO sued OpenAI earlier this year after the latter announced its partnership with Ive's new firm, arguing that OpenAI's planned "io" branding was too close to its...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
Photos App Icon Liquid Glass

John Gruber Shares Scathing Commentary About Apple's Departing Software Design Chief

Thursday December 4, 2025 9:30 am PST by
In a statement shared with Bloomberg on Wednesday, Apple confirmed that its software design chief Alan Dye will be leaving. Apple said Dye will be succeeded by Stephen Lemay, who has been a software designer at the company since 1999. Meta CEO Mark Zuckerberg announced that Dye will lead a new creative studio within the company's AR/VR division Reality Labs. On his blog Daring Fireball,...
maxresdefault

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Monday December 1, 2025 3:00 am PST by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Subscribe to the MacRumors YouTube channel for more videos. Below, we've collated an updated set of key details that ...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
Apple John Ternus 2019

Will John Ternus Really Be Apple's Next CEO?

Friday December 5, 2025 9:01 am PST by
There is uncertainty about Apple's head of hardware engineering John Ternus succeeding Tim Cook as CEO, The Information reports. Some former Apple executives apparently hope that a new "dark-horse" candidate will emerge. Ternus is considered to be the most likely candidate to succeed Cook as CEO. The report notes that he is more likely to become CEO than software head chief Craig Federighi, ...
ios 18 to ios 26 upgrade

Apple Pushes iPhone Users Still on iOS 18 to Upgrade to iOS 26

Tuesday December 2, 2025 11:09 am PST by
Apple is encouraging iPhone users who are still running iOS 18 to upgrade to iOS 26 by making the iOS 26 software upgrade option more prominent. Since iOS 26 launched in September, it has been displayed as an optional upgrade at the bottom of the Software Update interface in the Settings app. iOS 18 has been the default operating system option, and users running iOS 18 have seen iOS 18...