Developed Android/iPhone App Buggy

I had a mobile app developed for iPhone/Android, it is complete but the developer can't find time to iron out some bugs from the code. I will require the errors to be fixed for both platforms. The app is developed in HTML5 and the issues that need fixing are as follows: [login to view URL] in not working properly (the login platform logs in and then out again unexpectedly) 2. Page transitions laggy 3. Issue with loading pages (when a new page is opened, the app seems lose data from a previously opened page and has to reload it again) Offering $100 for this project.