Forget calories. Count plants.

Your daily gut score combines your fiber, plant variety, and hydration into one clear number. The more fiber and different plants you log — and the more water you get — the higher it climbs. One daily signal of how well you're feeding your gut.

Yes. The 30-plants-a-week metric comes from the American Gut Project — analysis of more than 10,000 microbiome samples across the US, UK, and Australia, showing that people who eat 30+ different plants weekly have significantly more diverse gut microbiomes than people eating fewer than ten. The 40g daily fiber target is rooted in research on what supports microbial diversity — well above the 10-15g most people actually get. And the daily hydration target reflects established total-water guidance from bodies like the EU's EFSA — around 2 to 2.5 liters a day, counting the water in your food as well as your drinks.

Diversity is what your microbiome thrives on — different plants feed different gut bacteria. Every unique plant you eat or drink in a week counts toward 30: fruits, vegetables, leafy greens, sea vegetables, herbs, spices, seeds, nuts, legumes, fresh juices. Each new one logged adds to your weekly variety count. Hit 30 in 7 days and your gut has everything it needs to flourish.

Yes — and that's part of why it works: Fiber First adapts to you instead of boxing you into someone else's plan. Choose metric or imperial, start your week on Sunday or Monday, and set your own daily fiber and hydration goals, but never below 30g of fiber or 2l of water (about 68 oz) a day — the floors where the real benefits begin. Only the 30-plants-a-week target is fixed — it's the thing that actually moves the needle: 30+ different plants a week is what builds a far more diverse, thriving gut. It's all built on the science — you just set the numbers that fit you.

Nope. You log the portions you actually use — a handful of almonds, a glass of fresh juice or plant milk, one banana, a cup of berries — and Fiber First does the grams behind the scenes. It even shows you the weight as you tap. And if you'd rather enter your own amount — an athlete fine-tuning every gram, or a day you just feel like it — the custom option's right there.

Most nutrition apps obsess over calories and macros — protein, carbs, fat. Fiber First tracks the metrics that actually shape gut health: fiber, plant diversity, and hydration. No calorie counting, no protein chasing. Just what changes how you feel.

Yes. From your account settings. You keep access through the end of your current billing cycle. Simple as that.

Go yearly, do the work — log every day for 30 days, hit your plants, your fiber, and your hydration. Do that and still want your money back? Email us within 7 days of finishing and we'll give you a full refund. You keep your free account. (To keep it fair, your 30 days start the day after you go premium, so a partial first day never counts against you.) Full conditions are in our refund policy.

Your locked price stays as long as your subscription stays active. Cancel and rejoin later and you'd pay whatever the rate is then — and it only goes up over time. So if locking today's price matters, stay subscribed.