Image Enhancer
Works best on photos under about 2 MP (screenshots, saved posts, older photos). Your photo stays on this device; nothing is uploaded. The first AI run downloads the engine and model once (about 25 MB), then it is cached.
Choose a photo to see the output size.
The photo above is shrunk to fit your screen, so the gain is hard to see. Tap it to pick a spot, then compare the two views below at full pixel size. Drag either one to move around.
On iPhone choose “Save Image” in the share sheet. Saved as a high-quality JPEG.