Looks OK, and I like the concept of combining cold storage to secure large sums of money with a hot wallet for daily spending.

However, considering the fact that it's closed source and from a fairly unknown developer, I would not trust my money with this. Especially with large savings, I will only trust that to something I can either 100% understand and verify myself, or that the general public (and in particular, other independent developers worldwide) can understand and verify.

I hope the developer will make this open source, as I think it's definitely a step forward in term of usability, and finding a compromise between ease of use and strong security.