Oomph for iPhone
The release of Oomph for iPhone has also meant new features for the platform. Oomph iPhone apps now have Libraries of multiple issues, Favourites, Pinch to zoom, content scrubber, search bar, social sharing as well as an updated user interface.
What resolution to use
For a standard measurement, it is helpful to use the point system rather than the pixel size that the iPhone renders your designs at. This is because the rendered pixels and the physical pixels can vary depending on the user's device and display settings.
Therefore, the size we recommend is: 375 x 667 (px)
All iPhones (since the iPhone 5) have the same aspect ratio, meaning that all designs will scale to fit to all.
See this guide to learn more about iPhone resolutions, including older Apple devices not accounted for here.
Like the iPad, the pixels per inch (PPI) chosen to export to will likely come down to the project's requirements. If file size is a concern, the minimum PPI might be 72, whereas if image quality is more important, you might use a higher PPI like 132 all the way up to 326. Note: This choice only effect images, text and vector content will not become pixelated regardless of which PPI is chosen. Oomph supports PDF and HTML in which text and vector content do not experience any loss is quality and will be displayed at the maximum resolution that the device supports.
Testing with Oomph Editor
Test your designs with the Oomph viewer by sideloading the content using iTunes.