As you might have heard, for the last couple of years we’ve been quietly rebuilding Telegram for iOS from scratch with Swift – a programming language released by Apple as a faster alternative to Objective C.

The Swift version of Telegram looks exactly as the old one, but is faster, slicker and more battery-friendly than the good old Telegram (which was already great considering it outperformed other messaging apps in speed).

This new Telegram has been available for everyone to download under the name “Telegram X” since January. Thousands of users have been testing it and sharing their feedback with us, so thanks to them the app is now much more polished than a few months ago. While we are still putting some finishing touches on it, it seems that the new Telegram is ready to be shipped to every Telegram user on iOS.

That’s why within the next week or two we are planning to update the default Telegram iOS App with the Swift version. As a result, Telegram will become faster, slicker and more efficient. Since it will rely on an entirely new codebase, some minor bugs and glitches might occur, but we’ll make sure they are quickly – or should I say “swiftly” – fixed.

This change will make Telegram the most popular messaging app written fully in Swift. Some would say it’s a big risk, but I think somebody has to take such risks and be the first to implement new technologies, such as e2e encryption – or Swift.

Some tech media reported that the Telegram Desktop app wasn’t secure because it “leaked IP addresses” when used to accept a voice call.

The reality is much less sensational – Telegram Desktop was at least as secure as other encrypted VoIP apps even before we improved it by adding an option to disable peer-to-peer calls. As for Telegram calls on mobile, they were always more secure than the competition, because they had this setting since day one.

During a peer-to-peer (P2P) call, voice traffic flows directly from one participant of a call to the other without relying on an intermediary server. P2P routing allows to achieve higher quality calls with lower latency, so the current industry standard is to have P2P switched on by default.

However, there’s a catch: by definition, both devices participating in a P2P call have to know the IP addresses of each other. So if you make or accept a call, the person on the other side may in theory learn your IP address.

That’s why, unlike WhatsApp or Viber, Telegram always gave its users the ability to switch off P2P calls and relay them through a Telegram server. Moreover, in most countries we switched off P2P by default.

Telegram Desktop, which is used in less than 0.01% of Telegram calls, was the only platform where this setting was missing. Thanks to a researcher who pointed that out, we made the Telegram Desktop experience consistent with the rest of our apps.

However, it is important to put this into perspective and realize that this is about one Telegram app (Telegram Desktop) being somewhat less secure than other Telegram apps (e.g. Telegram for iOS or Android). If you compare Telegram with other popular messaging services our there, unfortunately, they are not even close to our standards.

Using the terminology from the flashy headlines, WhatsApp, Viber and the rest have been “leaking your IP address” in 100% of calls. They are still doing this, and you can't opt out. The only way to stop this is to have all your friends switch to Telegram.

Last week at Telegram was intense – we’ve been busy polishing the rough spots in our new iOS app and fighting connection issues with little time left for sleep. Yet, there’s no other company in the world I would rather work at. At Telegram, we have the rare freedom to do what our users expect us to do, standing up for their interests.

The recent exodus of WhatsApp founders is a good example of what you end up with if you sell your company. You can earn some money, but you lose something much more valuable – your integrity and the ability to continue improving the lives of hundreds of millions of people.

Last week, it became known that WhatsApp has had a backdoor for years – anybody you had a video call with could potentially read all your messages. Even if there are no more backdoors left (which seems unlikely), WhatsApp has other flaws which make most of the messages sent via the app accessible to third parties.

In the long run, promises given by corporations like Facebook just don't materialize, because these corporations prioritize maximizing profits over serving their users. And that’s what makes Telegram so different – the only thing that will ever matter to us is your interests.