Download file A starter template in Open Office Drawing which is a combination of wireframing mobile app + navigation flowchart/sitemap. While I mostly create mine in Illustrator, this can be useful to those who are not familiar with Adobe tools. Plus Open Office is freely available. Thoughts on improvement welcomed.
The DPI Calculator can be found here or copy and paste http://jennift.com/dpical.html Or you can install the Chrome extension here This dpi calculator is an extension from Martin Cohen’s calculator to include xxhdpi and xxxhdpi. If you wish to donate, please do so at Martin’s site.