As of right now, there is no iOS version of Chronos Planner, however it is on our product roadmap. We wanted to focus on the desktop experience first and identifying the core features of the product while ensuring a polished user experience was our main priority.
We are intending to expand to iPhone and iPad in the future, but if you have any platform-specific features you would like to see, please send your feedback to hello@bosc.app and we will take your input into consideration.