All you need to know about Apple's latest iPhones, watches

Apple is upgrading its flagship iPhone X with two new devices: the iPhone XS and the iPhone XS Max. Both come in gold, silver or space gray with the only big difference being their size.

Both of the iPhones have a dual-camera system on their rear panel. One of these is a 12MP wide-angle lens which comes with a new image stabilisation sensor. It's supported by a 12 MP telephoto camera that has 2x optical zoom. On the front, there is a True Depth camera that allows facial recognition.

Apple also launched its iPhone XR with a 6.1-inch LCD display. The company says its screen, which is Liquid Retina, is the first edge-to-edge LCD handset they've built.  The XR has a single 12MP wide-angle lens on its rear panel. The XR is being made available in white, black, blue, coral and yellow. Apple is also making a Product (RED) version.

Inside both phones is Apple's latest chip, which it has dubbed as A12 Bionic. The company says it is the first seven nanometer chip to be used in a smartphone and it is capable of running five trillion operations per second compared to the A11 Bionic's 600 billion. It has 6.9B transistors, a six-core CPU, four-core GPU and an eight-core neural engine.

Pricing is through the roof this year, with Apple revealing the most expensive iPhones ever

#iPhoneXR: Rs 76,900 (64GB), Rs 81,900 (128GB), Rs 91,900 (256GB)

#iPhoneXS: Rs 99,900 (64GB), Rs 1,14,900 (256GB), Rs 1,34,900 (512GB)

#iPhoneXSMax: Rs 1,09,900 (64GB), Rs 1,24,900 (256GB), Rs 1,44,900 (512GB)

The XS has a 5.8-inch OLED screen and packs in 2.7 million pixels while the XS Max has a 6.5-inch OLED screen and 3.3 million pixels. A look at how iPhone sizes have changed over the yearsiPhone (2007) - 3.5 inchesiPhone 3G (2008) - 3.5 inchesiPhone 3GS (2009) - 3.5 inchesiPhone 4 (2010) - 3.5 inchesiPhone 4S (2011) - 3.5 inchesiPhone 5 (2012) - 4 inchesiPhone 5S (2013) - 4 inchesiPhone 5C (2013) - 4 inchesiPhone 6 (2014) - 4.7 inchesiPhone 6+ (2014) - 5.5 inchesiPhone 6S (2015)  - 4.7 inchesiPhone 6S+ (2015) - 5.5 inchesiPhone SE (2016) - 4 inchesiPhone 7 (2016) - 4.7 inchesiPhone 7+ (2016) - 5.5 inchesiPhone 8 (2017) - 4.7 inchesiPhone 8+ (2017) - 5.5 inchesiPhone X (2017) - 5.8 inchesiPhone XS (2018) - 5.8 inchesiPhone XR (2018) - 6.1 inchesiPhone XS Max (2018) - 6.5 inches

Starting at $399, the new Apple Watch Series 4 is a significant upgrade from its predecessor. One of the most notable upgrades was the Watch's first increase in display size.

New features for the Apple Watch Series 4 include:

A new accelerometer and gyroscope that can detect falls.

The watch can also monitor electrocardiogram, or ECG, readingsAnother new feature is that it can detect atrial fibrillationA new S4 chip with a 64-bit dual-core processor, delivering twice the speed when compared to Series 3The same all-day battery life of its predecessor, despite its improved performanceA redesigned Digital Crown that now includes haptic feedback for "a more mechanical and responsive feel..."The addition of yoga and hiking as trackable workout typesA 50% louder speaker

Apple revealed the time it will take to release software updates as well. Its mobile operating system, iOS 12, will be available to download from September 17, as will the software update for its AI speaker, the HomePod. Meanwhile, macOS Mojave, which is designed for MacBooks and other Macs, will be released on September 24. 

Mark your calendars for the major announcements iPhone XS release date - September 21iPhone XS Max pre-order date - September 14iPhone XS Max release date - September 21iPhone XR pre-order date - October 19iPhone XR release date - October 26Apple Watch 4 pre-order date - September 14Apple Watch 4 release date - September 21