Every day
leaves a mark.
We are RAHBI. We explore mobile experiences that make everyday routines simpler, clearer, and more expressive.
A month, made of moments.
Choose a color. Tap a date. Watch a visual story begin. This is a standalone website demonstration—not a synced app calendar.
Colorful Day Marks.
A more visual everyday.
Make everyday count in color.
Give days a meaning with your own palette. Track calm, focus, self-care, or the categories that matter to you. Explore your patterns with history and insights.
View on Google Play ↗First product · Android · Release availability depends on Google Play listing
Color the calendar
Mark important activities and moments directly on a monthly view.
Make it yours
Set custom categories, descriptions and colors.
Notice patterns
Discover commonly used marks and streaks over time.
The real screens.
No imagined features.
A closer look at the calendar, categories, insights, personalization and privacy experience.
Technology with a human rhythm.
RAHBI is an emerging mobile application development company in Ukraine. We are beginning with a focused product: Colorful Day Marks. Our interests span mobile development, design, testing and product refinement.
Mobile development
Practical applications shaped around real user needs.
Android applications
Thoughtful Android experiences with clarity and usability.
Interface design
Simple digital interactions with a coherent visual language.
Prototypes
Testing early ideas through working digital concepts.
Software testing
Reviewing product behavior, accessibility, and quality.
Maintenance & iteration
Refining and improving applications over time.
Good ideas start
with a conversation.
Have a question about RAHBI or Colorful Day Marks? Reach us directly.