C : duotone A color filter app that allows you to add color to your daily life. C : duotone offers 26 high-end duotone filters that we specially created together with leading color and design experts. Use the app to express your unique personality and make your memories even more special. If you want to love your photos all over again, please join together with C. ○ Amazing 26 Duotones Make your photos even more special. Choose from 26 amazing duotone filters specially created by 8 color experts. The most surprising news for users is that we constantly update our app. ○ Ai Filter Recommendation Smart Filter Recommendation Feature. Ai will find the optimal color combination for your photos. Make your photos beautiful by using the recommended duotone filter. ○ Real-time Duotone Filter Choose the duotone and create your photos exactly as you want. Use the app to add color to your photos more easily, simply, and quickly.