Mobile Diffusion is an image generator app that uses AI technology to create stunning images based on user input text prompts. The app works offline on mobile devices and requires a one-time download of a 4.5 GB model. It allows users to specify both positive and negative prompts to fine-tune image output. The app is privacy-focused and keeps all data on the device. However, there are known issues with the app crashing during image generation due to high device resource usage and taking longer than expected to generate images. It is supported on newer iOS devices with 6GBs of RAM or more.