Based on your input, I can assist you in finding a download link for Inkscape 1.3.1 for iPhone.

Unfortunately, there is no official Inkscape app available for iOS devices like iPhones. However, there are alternative options to run Inkscape on an iPhone:

1. Install the Android emulator BlueStacks on your Mac or PC and then download the Inkscape APK file from a trusted source.

2. Use the cloud-based graphics editor PixiClip, which is compatible with iPhone browsers. Although it's not as powerful as Inkscape, it can still be used for simple vector graphics tasks.

If you're looking to run Inkscape on your computer or laptop, I can provide you with a download link for the Windows 64-bit executable file:

* 'Inkscape 1.3.1 (Windows 64-bit)'(https://inkscape.org/en/download/#windows)

Please note that this is not an iPhone-specific download. You'll need to install it on your computer or laptop and use it via BlueStacks or another emulator.

If you have any further questions or require assistance with installing Inkscape, feel free to ask!

Free Inkscape 1.3.1 for iphone download