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: On March 18, 2014, an 8 GB version of the device was released in UK, France, Germany, Italy, Australia, Sweden and China. On September 9, 2014, Apple discontinued the iPhone 4S as part of its annual refresh of the iPhone lineup -- in which time the iPhone 6 and iPhone 6 Plus were introduced -- thus making the iPhone 5C the entry - level model complimentary when a two - year contract is signed with a US carrier or $349 off - contract. The 16 & 32 GB versions of the iPhone 5C were also discontinued globally, replaced by the 8 GB model. However, some carriers in the US like AT&T kept the 16 GB and 32 GB models instead of having the 8 GB model, thus the 16 GB model was $0 (on - contract) and the 32 GB was priced between $50 -- $100 (on - contract). The 8 GB iPhone 5C succeeded the discontinued iPhone 4S as Apple's entry - level smartphone.

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: 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.

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: The iPhone 5 is a smartphone designed and marketed by Apple Inc. It is the sixth generation of the iPhone, succeeding the iPhone 4S and preceding the iPhone 5S and iPhone 5C. Formally unveiled as part of a press event on September 12, 2012, it was released on September 21, 2012. The iPhone 5 is the first iPhone to be announced in September and setting a trend for subsequent iPhone releases, the first iPhone to be completely developed under the guidance of Tim Cook and the last iPhone to be overseen by Steve Jobs.

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: On March 21, 2017, Apple announced an iPhone 7 with a red color finish (and white front), as part of its partnership with Product Red to highlight its AIDS fundraising campaign. It launched on March 24, 2017, but it was later discontinued after the announcement of the iPhone 8 and iPhone 8 Plus.

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 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 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: 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: Performance optimizations were made in order to speed up common tasks across all supported iOS devices. Tests done by Apple on an iPhone 6 Plus showed apps launching 40 percent faster, the system keyboard activating 50 percent faster, and the camera opening 70 percent faster.

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: Apple intended Swift to support many core concepts associated with Objective-C, notably dynamic dispatch, widespread late binding, extensible programming and similar features, but in a "safer" way, making it easier to catch software bugs; Swift has features addressing some common programming errors like null pointer dereferencing and provides syntactic sugar to help avoid the pyramid of doom. Swift supports the concept of protocol extensibility, an extensibility system that can be applied to types, structs and classes, which Apple promotes as a real change in programming paradigms they term "protocol-oriented programming" (similar to traits).

paragraph_text: The iPhone 6 and 6 Plus were moved to the midrange spot in Apple's iPhone lineup when the iPhone 6S and 6S Plus were released in September 2015. The iPhone 6 and 6 Plus were discontinued in most countries on September 7, 2016 when Apple announced the iPhone 7 and iPhone 7 Plus. Their spot as the entry - level iPhone was replaced by the iPhone SE, which was released earlier on March 31, 2016. The iPhone 6 was relaunched with 32 GB of storage in Asian markets in February 2017 as a midrange / budget iPhone. It was later expanded to Europe, before hitting the US markets in May 2017, and Canada in July 2017.

paragraph_text: The iPhone 5 is a smartphone that was designed and marketed by Apple Inc. It is the sixth generation of the iPhone succeeding the iPhone 4S and preceding the iPhone 5S and iPhone 5C. Formally unveiled as part of a press event on September 12, 2012, it was released on September 21, 2012. The iPhone 5 is the first iPhone to be announced in September and, setting a trend for subsequent iPhone releases, the first iPhone to be completely developed under the guidance of Tim Cook and the last iPhone to be overseen by Steve Jobs.

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 A11 is manufactured by TSMC using a 10 nm FinFET process and contains 4.3 billion transistors on a die 87.66 mm in size, 41% smaller than the A10. It is manufactured in a package on package (PoP) together with 2 GB of LPDDR4X memory in the iPhone 8 and 3 GB of LPDDR4X memory in the iPhone 8 Plus and iPhone X.

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.

Question: when did the iphone 6s plus by the creator of Swift come out?
Answer: September 25, 2015