No account or signup required. Download the app, and then start color correcting photos in seconds. Example underwater photo and video available in the help section. AquaColorFix Features: •Simple one tap underwater photo and video color correction. •Color Correction Adjust •Saturation Adjust •Hue Adjust •Brightness Adjust •Sharpness Adjust •Contrast Adjust •Exposure Adjust •Highlights Adjust •Shadows Adjust •Black Point Adjust •Add Vignette •Save unlimited color corrected photos that include a watermark. Additional AquaColorFix Pro features available after an In-App purchase: •Remove the watermark or add a custom watermark. •Save unlimited color corrected videos. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/