The list below is based on iOS 15 beta 1.
iOS 15 beta 1 has added the Magnifier app com.apple.Magnifier (Magnifier on the App Store)
App Name | Bundle ID
---------------------------------
Activity | com.apple.Fitness
App Store | com.apple.AppStore
Apple Store | com.apple.store.Jolly
Books | com.apple.iBooks
Calculator | com.apple.calculator
Calendar | com.apple.mobilecal
Camera | com.apple.camera
Clips | com.apple.clips
Clock | com.apple.mobiletimer
Compass | com.apple.compass
Contacts | com.apple.MobileAddressBook
FaceTime | com.apple.facetime
Files | com.apple.DocumentsApp
Find My | com.apple.findmy
GarageBand | com.apple.mobilegarageband
Health | com.apple.Health
Home | com.apple.Home
iCloud Drive| com.apple.iCloudDriveApp
iMovie | com.apple.iMovie
iTunes Store| com.apple.MobileStore
iTunes U | com.apple.itunesu
Magnifier | com.apple.Magnifier
Mail | com.apple.mobilemail
Maps | com.apple.Maps
Messages | com.apple.MobileSMS
Measure | com.apple.measure
Music | com.apple.Music
News | com.apple.news
Notes | com.apple.mobilenotes
Phone | com.apple.mobilephone
Photos | com.apple.mobileslideshow
Photo Booth | com.apple.Photo-Booth
Podcasts | com.apple.podcasts
Reminders | com.apple.reminders
Safari | com.apple.mobilesafari
Settings | com.apple.Preferences
Shortcuts | com.apple.shortcuts
Stocks | com.apple.stocks
Tips | com.apple.tips
Translate | com.apple.Translate
TV | com.apple.tv
Videos | com.apple.videos
Voice Memos | com.apple.VoiceMemos
Wallet | com.apple.Passbook
Watch | com.apple.Bridge
Weather | com.apple.weather
Official Apple List:
Previous versions of iOS: