Isolux

Isolux makes one colour pop while turning everything else to greyscale — in seconds, entirely on your device. Pick a photo, drag the colour wheel to the hue you want to keep, and watch the selective colour effect appear in real time. Tap a preset (Red, Orange, Gold, Green, Sky, Purple) for instant results. Adjust the range slider to widen or narrow the preserved colour band. Toggle before/after to compare. Share directly to any app. Every step runs locally — no account, no cloud upload, no internet required. Includes: • Tactile colour wheel with drag-to-select hue • Six one-tap presets • Adjustable hue range • Real-time preview • Before/after comparison • Edit history • Share via any app Pro (one-time unlock): • Batch — process up to 20 photos at once with the same settings • Save to Photos at full original resolution • Unlimited edit history