I really liked the app, but as always I have some concerns regarding the app security. Do You offer any guarantees regarding the app security? Can You expand on it (provide me with more comments/insights/explanations)? Do You want to involve all the exchange markets or only the specific ones from the Top List?
We want to import all the exchanges supporting API as a beginning for automated portfolio tracking so your keys could be passive with permission only to read balance. When we implemented trading and full support of the APIs we will share more about the security.