paragraph_text: iPhone 7 and iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6S and iPhone 6S Plus as the flagship devices in the iPhone series. Apple also released the iPhone 7 and 7 Plus in numerous countries worldwide throughout September and October 2016. They were succeeded as flagship devices by the iPhone 8 and iPhone 8 Plus on September 22, 2017 and the upcoming iPhone X on November 3, 2017.

paragraph_text: iPhone 7 and iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6S and iPhone 6S Plus as the flagship devices in the iPhone series. Apple also released the iPhone 7 and 7 Plus in numerous countries worldwide throughout September and October 2016. They will be succeeded as flagship devices by the iPhone 8 and iPhone 8 Plus on September 22, 2017 and the iPhone X on November 3, 2017.

paragraph_text: iPhone X (``X ''pronounced`` ten'' / tɛn /) is a smartphone designed, developed, and marketed by Apple Inc. It was announced on September 12, 2017, alongside the iPhone 8 and iPhone 8 Plus at the Steve Jobs Theater in the Apple Park campus. The phone was released on November 3, 2017. This device marks the iPhone series' tenth anniversary, with ``X ''being the symbol for`` ten'' in Roman numerals.

paragraph_text: Apple debuted the iTunes Wi-Fi Music Store on September 5, 2007, in its Media Event entitled "The Beat Goes On...". This service allows users to access the Music Store from either an iPhone or an iPod Touch and download songs directly to the device that can be synced to the user's iTunes Library over a WiFi connection, or, in the case of an iPhone, the telephone network.

paragraph_text: iPhone 8 and iPhone 8 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 12, 2017, alongside the higher - end iPhone X, at the Steve Jobs Theater in the Apple Park campus, and were released on September 22, 2017, succeeding iPhone 7 and iPhone 7 Plus.

paragraph_text: The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc. The devices are part of the iPhone series and were announced on September 9, 2014, and released on September 19, 2014. The iPhone 6 and iPhone 6 Plus jointly serve as successors to the iPhone 5S and were themselves replaced as flagship devices of the iPhone series by the iPhone 6S and iPhone 6S Plus on September 9, 2015. The iPhone 6 and 6 Plus include larger 4.7 and 5.5 inches (120 and 140 mm) displays, a faster processor, upgraded cameras, improved LTE and Wi - Fi connectivity and support for a near field communications - based mobile payments offering.

paragraph_text: iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch. Updates for iOS are released through the iTunes software, and, since iOS 5, via over-the - air software updates. With the announcement of iOS 5.0 on June 6, 2011, a USB connection to iTunes was no longer needed to activate iOS devices; data synchronization can happen automatically and wirelessly through Apple's iCloud service. Major new iOS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new iPhone models. The current stable release, iOS 11.1. 1, was released on November 9, 2017. The most recent beta release for iOS 11.2 was released on November 13, 2017.

paragraph_text: iPhone 6S and iPhone 6S Plus (stylized and marketed as iPhone 6s and iPhone 6s Plus) are smartphones designed, developed and marketed by Apple Inc. They were announced on September 9, 2015, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, with pre-orders beginning September 12 and official release on September 25, 2015. The iPhone 6S and 6S Plus were succeeded by the iPhone 7 and iPhone 7 Plus in September 2016.

paragraph_text: iPhone 7 and iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6S and iPhone 6S Plus as the flagship devices in the iPhone series. Apple also released the iPhone 7 and 7 Plus in numerous countries worldwide throughout September and October 2016. They were succeeded as flagship devices by the iPhone 8 and iPhone 8 Plus on September 22, 2017, and the iPhone X on November 3, 2017.

paragraph_text: The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc. The devices are part of the iPhone series and were announced on September 9, 2014, and released on September 19, 2014. The iPhone 6 and iPhone 6 Plus jointly serve as successors to the iPhone 5S and were themselves replaced as flagship devices of the iPhone series by the iPhone 6S and iPhone 6S Plus on September 9, 2015.

paragraph_text: iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch. Updates for iOS are released through the iTunes software, and, since iOS 5, via over-the - air software updates. With the announcement of iOS 5.0 on June 6, 2011, a USB connection to iTunes was no longer needed to activate iOS devices; data synchronization can happen automatically and wirelessly through Apple's iCloud service. Major new iOS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new iPhone models. The current stable release is iOS 11.0. 1.

paragraph_text: Cannon Cadets is a gaming app developed by Ray Sharma's XMG Studio for the iPhone and iPod Touch. It was officially released in the iTunes App Store on August 11, 2010.

paragraph_text: The iPhone 6 and iPhone 6 Plus were officially unveiled during a press event at the Flint Center for Performing Arts in Cupertino, California on September 9, 2014 and released on September 19, 2014; pre-orders began on September 12, 2014, with the iPhone 6 starting at US $649 and the iPhone 6 Plus starting at US $749. In China, where the iPhone 5c and 5s were the first models in the iPhone series to be released in the country on the same day as their international launch, Apple notified local wireless carriers that it would be unable to release the iPhone 6 and iPhone 6 Plus on the 19th because there were ``details which are not ready ''; local media reported that the devices had not yet been approved by the Ministry of Industry and Information Technology, and earlier in the year, a news report by state broadcaster China Central Television alleged that iPhone devices were a threat to national security because iOS 7's`` frequent locations'' function could expose ``state secrets. ''

paragraph_text: The iPhone 6S is powered by the Apple A9 system - on - chip, which the company stated is up to 70% faster than Apple A8, and has up to 90% better graphics performance. The iPhone 6S has 2 GB of RAM, more than any previous iPhone, and also supports LTE Advanced. The Touch ID sensor on the 6S was also updated, with the new version having improved fingerprint scanning performance over the previous version.

paragraph_text: iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch. Updates for iOS are released through the iTunes software, and, since iOS 5, via over-the - air software updates. With the announcement of iOS 5.0 on June 6, 2011, a USB connection to iTunes was no longer needed to activate iOS devices; data synchronization can happen automatically and wirelessly through Apple's iCloud service. Major new iOS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new iPhone models. The current stable release, iOS 11.4, was released on May 29, 2018.

paragraph_text: iPhone 7 uses the Apple A10 Fusion 64 - bit system - on - chip, which consists of two low - power cores and two high - power cores (only two cores are used at any point in time). The A10 chip also features a hexa - core graphics chip capable of ``console - level gaming ''. As with prior models, iPhone 7 is available in two sizes: one with a 4.7 - inch screen, and a`` Plus'' variant with a 5.5 - inch screen. The displays have identical sizes and resolutions to iPhone 6S, but with a wider color gamut and increased brightness. The screen - to - body ratio is about ~ 66% and ~ 68% for the 7 and 7 Plus, respectively.

paragraph_text: iOS 10 A version of the iOS operating system The default iOS 10 home screen on an iPhone 7 Developer Apple Inc. Source model Closed with open - source components Initial release September 13, 2016; 17 months ago (2016 - 09 - 13) Latest release 10.3. 3 (14G60) / July 19, 2017; 7 months ago (2017 - 07 - 19) Platforms iPhone iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6 Plus iPhone 6S iPhone 6S Plus iPhone SE iPhone 7 iPhone 7 Plus iPod Touch iPod Touch (6th generation) iPad iPad (4th generation) iPad Air iPad Air 2 iPad (2017) iPad Mini 2 iPad Mini 3 iPad Mini 4 iPad Pro Kernel type Hybrid (XNU) License Proprietary software with open - source components Preceded by iOS 9 Succeeded by iOS 11 Official website iOS 10 at the Wayback Machine (archived September 12, 2017) Support status Third - party application support only

paragraph_text: The Digital Audio Access Protocol (DAAP) is the proprietary protocol introduced by Apple in its iTunes software to share media across a local network.

paragraph_text: iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch. Updates for iOS are released through the iTunes software, and, since iOS 5, via over-the - air software updates. With the announcement of iOS 5.0 on June 6, 2011, a USB connection to iTunes was no longer needed to activate iOS devices; data synchronization can happen automatically and wirelessly through Apple's iCloud service. Major new iOS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new iPhone models. The current stable release, iOS 11.2. 1, was released on December 13, 2017. The most recent beta release for iOS 11.2. 5 was released on December 13, 2017.

paragraph_text: The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc. It is the eighth generation of the iPhone, succeeding the iPhone 5S that were announced on September 9, 2014, and released on September 19, 2014. The iPhone 6 and iPhone 6 Plus jointly were themselves replaced as the flagship devices of the iPhone series by the iPhone 6S and iPhone 6S Plus on September 9, 2015. The iPhone 6 and 6 Plus include larger 4.7 and 5.5 inches (120 and 140 mm) displays, a faster processor, upgraded cameras, improved LTE and Wi - Fi connectivity and support for a near field communications - based mobile payments offering.

Question: When did the iPhone 6S plus of the developer of iTunes come out?
Answer: September 25, 2015