Hopefully we can be faster… but it is not easy to get all the pieces working in such a small device / memory space.
With respect to timeline… We just closed milestone 1.
Our progress report can be found here:
Zondax Milestone 1 - Progress Report
Something to clarify, we are doing the app itself… C/Rust and some integration libraries that can be used by anyone…
We are (at least for now) integrating in to Ledger Live UI. We are looking at that… but the real challenge has always been the device itself. not JS-based wallets like Ledger Live.