Zen Color - Color By Number by Oakever Games is free to download and play, making it accessible for everyone to enjoy a relaxing coloring experience. However, the app contains optional in-app purchases, which allow you to unlock special coloring packs, remove ads, or access premium features like unlimited hints. These purchases are entirely optional, and the basic gameplay can be thoroughly enjoyed without them.

The app features advertisements that appear between coloring sessions or when starting a new page, which can provide a non-intrusive way for the developers to maintain the app while keeping it free for users. If you find the ads disruptive, the option to remove them via an in-app purchase ensures a smooth, uninterrupted coloring experience.

Installation on iOS Devices: Zen Color - Color By Number is compatible with iOS devices running iOS 11.0 or later. To install, open the App Store on your device and use the search bar to find "Zen Color - Color By Number." Once you locate the app, tap the "Get" button to begin downloading. You might need to confirm your Apple ID password or use Face/Touch ID as part of security verification. During installation, the app may request permissions for notifications to keep you updated on new coloring pages and features.

Installation on Android Devices: For Android devices, ensure your system is running on Android 6.0 or later for optimal compatibility. Go to the Google Play Store and search for "Zen Color - Color By Number." Once found, tap "Install" to download the app. You may be prompted to give permissions for the app to access storage — this is necessary for saving your coloring progress. Additionally, the app may request access to network settings for displaying ads and downloading new content. Pay attention to these permissions to ensure a smooth experience.

Step 1: Once the app is installed, open it and allow any initial permissions requested for an optimal experience. This may include notification settings and storage access for saving your work.

Step 2: You will be greeted with a welcome screen and a brief introduction to the app. This may include a quick interactive tutorial showing you how to use the color selection tools and navigate the canvas.

Step 3: Choose your first coloring page from various categories like nature, animals, or mandalas. Pages will be numbered according to layers of colors, offering different complexity levels based on your preference.

Step 4: Once you have selected a page, tap on the paint palette to see available colors. Each number corresponds to a specific shade, guiding you in coloring each segment correctly.

Step 5: Complete the page by filling in each numbered section with its matching color. Utilize hints sparingly if you ever feel stuck, and enjoy watching your masterpiece come to life as each section clicks into place.

Tip 1: Start with simpler pictures that have fewer colors if you are new. This helps familiarize with the interface without feeling overwhelmed by complex patterns.

Tip 2: Make use of the hints feature but do so sparingly. It's a great tool for when you're truly stuck, but relying on it can detract from the sense of accomplishment in finishing a picture unaided.

Tip 3: Participate in daily challenges if available. They offer unique images and sometimes rewards, enhancing your collection and providing fresh content regularly.