
Apple has sent an email to its Developer Program members encouraging them to find out how their iOS apps can take advantage of 3D Touch on iPhone 6s and iPhone 6s Plus, signaling that the company would like to increase App Store adoption of the all-new pressure-sensitive feature.

3D Touch is a pressure-sensitive display technology that enables iPhone users to make "Peek" and "Pop" gestures to access Quick Action shortcut menus, preview content within apps or animate Live Photos. The feature is one of the biggest new additions to the iPhone 6s and iPhone 6s Plus released in September.
Nevertheless, nearly three months later, a number of developers are only now beginning to update their apps with 3D Touch support. 3D Touch is also not as natural of an experience as multi-touch for some iPhone users, and it could take some time before the new feature becomes registered in muscle memory.
MacRumors shared a poll with our Twitter followers asking if they use 3D Touch, and the results are expectedly mixed. The poll, which has received nearly 4,000 votes and counting, will be live until December 17 at around 10:30 AM Pacific, so be sure to participate if you own an iPhone 6s or iPhone 6s Plus.
Do you use 3D Touch? - MacRumors.com (@MacRumors) December 16, 2015
Adobe Photoshop Lightroom
Amazon Video
Astropad Mini
Badland
BBM
Buffer
Byword
Camera+
Canary
Capital One Mobile
CARROT Weather
Citymapper
Coda
Day One
Deezer Music
Drafts
Dropbox
ESPN
Evernote
Facebook Messenger
Fantastical
Flickr
GIF Keyboard
Google Chrome
Google Drive
Hipstamatic
Instapaper
iWork suite
KakaoTalk
Launch Center Pro
Lifesum
Microsoft Outlook
News360
NFL
OneDrive
OpenTable
Overcast
PCalc
Pixelmator
Periscope
Reeder 3
Shazam
Skype
Spark
SPG
Spotify
Storehouse
Things
Todo
Touchnote
Tumblr
TuneIn Radio
Tweetbot
VSCO
Waze
Weather Underground
Workflow
Wunderlist
The list above will be periodically updated with other popular 3D Touch apps.
Article Link: Apple Encourages App Store Developers to Adopt 3D Touch