See it in action
Simple. Visual. Satisfying.
Tap a food, it's logged. Watch your rainbow fill up as the week goes on.
Track your week
Hit 40 & all 7 colours 🎉
300+ foods to choose from
– eat the rainbow –
Can you eat 40 different whole foods this week? Track your food variety, hit all 7 colour groups, and give your gut microbiome what it needs to thrive.
Get it on Google PlayYou've heard of the 30 plants a week challenge. This goes further — 40 whole foods, across every colour of the rainbow, tracked in seconds.
See it in action
Tap a food, it's logged. Watch your rainbow fill up as the week goes on.
Track your week
Hit 40 & all 7 colours 🎉
300+ foods to choose from
"The single most important dietary change you can make is to increase the variety of plants you eat."— Professor Tim Spector, gut microbiome researcher & author of Spoon-Fed
Why it works
No calorie counting. No meal plans. Just a simple weekly variety challenge backed by science.
Eat 40 different whole foods each week. Fruits, veggies, grains, nuts, seeds, herbs — they all count. Reset every week and try to beat your score.
Track food across 7 colour categories — red, orange, yellow, green, purple, white, and brown. Each colour group feeds different gut bacteria.
Browse 300+ whole foods organised by category. Tap to log, tap again to remove. Mark your staples as favourites for even faster logging.
See how your food variety improves week by week. Keep a streak going. Challenge yourself to try something new each week.
An optional evening nudge to log what you ate today. Gentle, not nagging — just enough to keep the habit going.
Fully free with optional ad removal for a one-time purchase. No subscription. No paywall hiding core features. Just the app.
Get started
Three steps. Takes about 30 seconds a day.
Free on Android. No sign-up, no account needed. Open it and you're ready to go.
Browse by category — fruits, veggies, grains, nuts, herbs and more. Tap each food you've eaten.
Your weekly progress bar fills up as you go. Try to hit 40 foods and all 7 colours before Sunday.
Your gut will thank you in about 3–4 days.
Get it on Google PlayFROM THE BLOG
What the research actually says about food diversity, gut health, and eating the rainbow.
The science behind food diversity, gut microbiome health, and why variety matters more than any single superfood.
Read more →Tim Spector's recommendation explained, with practical tips — and the case for pushing beyond 30 to 40 whole foods.
Read more →Why different colours in food represent different plant chemicals — and why all 7 colour groups matter for a healthy microbiome.
Read more →