Is buying iPhone is worth or not?

Yes off course no doubt that iPhones really worth on their price. My experience with iPhones/iOS is much batter than Jawa, window, Android,

I will try and be as objective as possible while trying to answer this.

So far, I have only used a total of three phones in my life till date. My first phone was an Nokia 1100 basic phone the second was a dumb Sony Ericsson phone, and my last phone was an Android-based Sony Xperia S, which was the flagship Xperia at that time. Currently I am using my HTC phone after I lost my Xperia a few months back, and it has been a revelation. I have a few friends who own iPhones from various generations. Now Redmi,Xiaomi,Vivo,oppo lot of brands in market.

Coming to the point, I have never felt that the cost of an iPhone is justified. It is easily about 15-20k more expensive than an Android flagship phone. The user experience on the iPhone is quite good even though their features seem a bit dated to me. I do agree that during the initial few iPhones, there was leaps and bounds of difference when compared with anything else in the market. However, lately, I have felt that their innovation has slowed down, and a number of other cellphone manufacturers, who run their phones on the Android platform may in fact have overtaken Apple when it comes to the features and designs that they offer in their flagship phones.

Personally, I have found that iPhones lack when compared to other flagships when it comes to camera performance, screen size, and battery life. The UI (User Interface) is a matter of personal preference of course, and I can't really say one is better than the other. Also, the hardware of iPhone, even though it is lower specced than Android flagships, is good enough for the iOS platform and all apps and games run as smooth as on any other Android phones. Some of the above issues have been addressed in the latest iPhone 6 and 6 plus, but personally, I was not too impressed. I think Apple is now playing catch-up with the rest as against them leading the race, as was the case a few years back. I did not like the curvy and slimmer design of the new iPhone either. I just cannot seem to justify the amount you are paying, essentially, for what others on Android have already implemented. There is a valid argument that there is a huge difference in the implementation done by Apple and that done by others on Android. However, I am sure, these can be overcome by the manufacturers themselves by sending out a fresh software update patch once they have perfected it. This is essentially a case of going to the market early to get the best produce. You can of course cook it properly leisurely.

Ecosystem wise, I feel it is better to go with Android, as most of the people use Chrome as their browser, Gmail for their emails, and Google Calendar for their events calendar. Having all that synced with your phone, PC, and all other devices is really helpful, especially if you are looking to get some work done on the move. I would also highly recommend Google Drive for sharing data and syncing such data which you want to access at home, at work, and basically anywhere.

Also, as a footnote, I would like to add that I have found that iPhones which are a generation down, example, with the entry of iPhone X and XI plus, the iPhone 6S, are better value for money and worth buying.