New Delhi: If you have decided tobu yan iPhone, then you now have three good options to choose from. The problem is, however, you may not be able to decide which iPhone is right for you? The flagship 5S? The colorful 5C? Or the iPhone 4S that can still meet you needs? Let India TV help you decide, as compare the features and specs of the three iPhones available in 2013-2014.SizeBoth the iPhone 5S and 5C looks identical, though the 5C is 18 percent thicker. In comparison, the iPhone 4S is 7 per cent shorter than the two newer models. WeightThe iPhone 5S is the lightest of them all. The iPhone 5S weighs 112 grams while the iPhone 5C weighs 132 grams and the older iPhone 4S is the heavily of them all at 140 grams. BuildSurprisingly, all the three handsets are made of different materials. We have the aluminum iPhone 5s, the plastic iPhone 5c, and the iPhone 4s, with its two plates of glass sandwiched around a stainless steel band.ColorsOut of them the iPhone 5C is available in a variety of eye-catching colors. The iPhone 5S is available in silver/white, 'space grey'/black and gold/white options. The gold version is probably one of the best iPhones out of them all. The iPhone 4S is available only in black and while. DisplayOut of the three only iPhone 4S has the smallest screen of 3.5 inch size. Both iPhone 5S and 5C have 4.0-inch LCD screens. Resolution wise, the iPhone 5S offers display of 1136\u00d7640 pixels resolution, the iPhone 4S comes with a resolution of 960\u00d7640 pixels and the iPhone 5C offers a display of 1136\u00d7640 pixels.Fingerprint sensorOne of the best features of iPhone 5S is Touch ID fingerprint sensor. As of now, the iPhone 5S is the only iPhone with an integrated fingerprint scanner built into the Home button. With Touch ID you can protect your data without having to type a passcode. Hold your finger on the home button for a second or two, and the access will be granted. Touch ID is also capable of keeping tabs of multiple different fingerprints, so you won't have to worry about your friends buying embarrassing songs with your iTunes account with a single touch. The home button is now made of sapphire glass to reduce the potential for damaging one of the 5S' most notable features, and it's bounded by a steel \u201cdetection ring\u201d that determines when your finger is on the home button and fires up the Touch ID sensor.CamerasOut of them iPhone 5S has the best camera. The iPhone 5S has received an improved camera (still 8-megapixel) that now features f/2.2 aperture and a \u201ctrue tone\u201d dual-element flash. Other camera improvements in iPhone 5S includes image stabilisation, live photo filters and a new Burst mode that takes 10 shots per second and automatically suggests the best one. Apple iPhone 5S camera has a 15 per cent larger sensor and an improved f/2.2 aperture to let in more light for brighter results. Finally, the iPhone 5S can take better 1080p video too. The main 8MP camera now has a slow-motion video feature plus video stabilisation to reduce unwanted camera wobble.\u00a0The front-mounted iSight camera also features an improved backside illumination sensor (BIS) for better performance when FaceTiming in the gloom.In iPhone 4S you'll get an 8 megapixel camera that can record 1080p HD video.Camera flashWhile the iPhone 5 had a bog-standard LED flash, the iPhone 5S has a dual LED (True Tone) flash to reduce the intensity of the light and help you take better photos. The iPhone 5s' second LED camera supposedly leads to more accurate skin tones when conducting flash photography. Slow-motion videoThe iPhone 5s lets you record slow-motion video. The SlowCam app on your iPhone 5 brings the super-smooth slow motion video capture from the iPhone 5s. Pressing and holding the Slow Motion button right above the record button lets you record the video in slow motion.The iPhone 5s can record 120 fps, making this a fine replacement for Apple's stock camera app. The iPhone 5 can pull down 60 fps, but the iPhone 4 and 4s can only reach 30 fps.ProcessorThe big draw for the iPhone 5S is probably under the hood. At the heart of every iPhone 5s beats a 64-bit A7 A7 system-on-a-chip (SOC), complete with the new M7 motion processor, make it the most powerful of the bunch. SOC is a term for a central processing unit (CPU), graphics processing unit (GPU), and other components like random-access memory (RAM) spun together into a single, integrated chip.The Apple A7 is twice as fast at both general purpose and graphics processing as its predecessor, the Apple A6, yet remains roughly the same size. The bigger news is that the Apple A7 is 64-bit, and the first 64-bit processor crafted for a consumer smartphone, and that it supports OpenGL ES 3.0, and comes with a companion chip, the M7 motion coprocessor. Even more impressive, A7 makes iPhone 5s the first 64-bit smartphone in the world \u2014 that's desktop-class architecture in a superslim phone. And because iOS 7 was built specifically for 64-bit, it's uniquely designed to take advantage of the A7 chip. iOS 7 and all the built-in apps are optimized for the A7 chip. The Camera app is a great example. It takes advantage of a new image signal processor built into A7 to give you up to 2x faster autofocus, faster photo capture, and higher video frame rates.The iPhone 4S comes with A5 processor which is twice as fast the processor in the iPhone 4.Motion coprocessorThe iPhone 5s has an M7 motion coprocessor, which lets you use fitness apps and accessories (like the Nike Fuelband, Jawbone Up, or Fitbit Flex) without sucking the life out of your iPhone's battery, assuming they all update their software for the M7. Over the long term, the chip could help advance gesture-recognition apps and sophisticated ways for your smartphone to anticipate your needs, or even your mental state, researchers say.StorageFor iPhone 5S, 16 gigabyte model costs $199, 32 gigabytes for $299 and 64 gigabytes for $399, all with two-year service contract. Without one, it's $649 for 16 gigabytes, $749 for 32 gigabytes and $849 for 64 gigabytes.For iPhone 5C, 16 gigabyte model comes for $99 and 32 gigabytes for $199, all with two-year service contract. Without one, it's $549 for 16 gigabytes and $649 for 32 gigabytes.The iPhone 4S offers just 8GB storage capacity, so you may have to pick and choose what you sync to your phone.RAMBoth iPhone 5S and 5C comes with 1 GB of RAM while the iPhone 4S only has 512 of RAM. 4G LTEBoth iPhone 5S and 5C support speedy 4G LTE mobile data.The old iPhone 4s maxes out at HSPA+ speeds for GSM carriers (like AT&T or T-Mobile in the US), which are faster than 3G, but slower than LTE. If you're on a CDMA carrier (like Verizon or Sprint in the US), then the 4S only supports slower 3G.BatteryOn the battery life front, all the three phones perform fairly. Results show that the iPhone 5S just edges out the old iPhone 5. It's rated at 10 hours of talk time on 3G, while the iPhone 5 can only muster 8 hours.Standby time is calculated to be 250 hours for the 5S and 225 hours for the iPhone 5. Average usage is much the same - 10 hours on LTE, up to 10 hours on Wi-Fi, up to 10 hours of video playback and up to 40 hours of audio playback.SoftwareAll three iPhones run the new iOS 7. All three iPhones, of course, tap into the well-stocked App Store as well.Voice controlAll three iPhones give you Siri for voice control.Release cycleBoth iPhon 5S and 5C are now available on Apple retail stores. The 4s was originally launched in late 2011. Starting prices (on-contract)The 5S is pricey though - on a two year contract, the 16GB model will cost $199, the 32GB model $299 and the 64GB 5S $399.Starting prices (off-contract)If you don't like to be tied down, you can always pay full price to get your iPhone with no strings attached.