Some of the forum discussion for the future of iOS development can be found at this link: iOS App Discussion. The Trello site has the initial discussions and discuss plans for a hybrid type iOS app at this link: Trello iOS
In order for a native iOS app to be released, the Dynalist team would have to add an iOS programmer and invest thousands of dollars to make it happen. With such a small team doing amazing things already, this would be difficult and risky.
To better understand the differences between a web app, hybrid app and native app, take a look at this article: http://www.mrc-productivity.com/blog/2016/06/the-mobile-app-comparison-chart-hybrid-vs-native-vs-mobile-web/
My recommendation to every iOS user on this forum to become Pro users so that development continues and plans can be made for hiring more staff. Hybrid apps are not so bad...they have tradeoffs like any other platform. The Dynalist team is committed to the Hybrid app for now but we can encourage them to consider a native app as they grow.