Fill your spare moments with colour! Virtual art book Color Pop AI has an endless library of images to make your own using its vast collection of expressive tools. Plus, with a dedicated “lock lines” button, you’ll never have to worry about accidentally colouring outside of the lines (unless you want to!).

What we love: The variety of images and tools on offer. Explore the Library tab’s Daily and Weekly Trend sections to find an image to colour or head to the Community tab for some inspiration. After something specific? The app’s AI image generator – available with a Pro subscription – creates an outline based on your prompt. The Splits category, meanwhile, divides each image into separate sections, making it perfect for trying out and comparing the app’s plentiful tools, which include pens, various brush effects, watercolours and pastels.

Quick tip: Entering your own Blue Period or set on sunny yellows and oranges? Whatever your preferred palette, tap the colour group button at the bottom of the screen to find dozens of ready-made options spanning block colours, gradients, textures, geometric patterns and much more. You can also create your own custom palettes for quick access to your favourite hues.

Meet the creator: Since 2012, MWM has been developing apps that aim to make technology feel like magic. It has hundreds of apps to its name, including drum pad Beat Maker Pro, video editor Moments and camera-roll cleaner Swipewipe.