The NES.App emulator for the Apple iPhone just keeps getting better. With this new release, the Nintendo Entertainment System emulator now stands at version 1.9.1. Here's the changelog for this release:

* Fixed vertical scrolling; fixed minor glitches in some games
* Show all 240 scanlines
* Palette tweaks to fix zapper for some palettes

Those following the development of this application will remember that Zapper support was added in version 1.9.0. The addition of Zapper support allows users to play lightgun titles such as Duck Hunt by tapping the iPhone's touchscreen to shoot. For a full list of lightgun titles that you can play using NES.App, check out our coverage of version 1.9.0.