A food intolerance app

One food list, matched to everything you react to.

Understand your intolerances and find the foods that work for your body.

9:41
Your personal food list
438work well
41pay attention
27avoid for now
3 ACTIVE TRIGGERS
Histamine FODMAPs Lactose
Type a food: broccoli, egg, almonds...
Blueberries
AvocadoHF
ZucchiniF
Salmon
ParmesanHL
StrawberriesHF
BananaHF
How it works

From how you feel to what to eat in three easy steps.

1.

Uncover your
food triggers

A few simple questions about how food makes you feel point to your most likely triggers, and to where they overlap.

2.

Get a personal
food list

Over 500 whole foods, showing what likely works for your body and what doesn't. And it keeps changing as your body does.

3.

See the nutrients
in the foods
you tolerate

Iron, magnesium, calcium and 20+ more, each with the foods from your list that give you the most of it.

Look at food the way your body does.

Seven main triggers across more than 500 whole foods, with numbers that come from real research.

Histamine · FODMAPs · Lactose · Gluten · Salicylates · Oxalates · Sulfur

Set your triggers

Every body reacts in its own way

Tolerance is rarely all or nothing, so you decide how strict to be with each chemical. Say histamine is your trigger.

Avoid

The full break, for a chemical that has
no place in your diet right now.

Limit

For a trigger you keep low without
cutting out completely.

Watch

Watching without restricting, for a trigger
you’re still figuring out.

Eat freely

For a chemical that fits easily on your plate.

ParmesanHigh histamine
ChickpeasMedium histamine
BlueberriesLow histamine
Inside the app

The whole story behind every food in one place

Inside the app

The whole story behind every food in one place

9:41
Cocoa powder
Cocoa powder
Condiments

A fine, deep-brown powder pressed from roasted cacao beans, intensely bitter and chocolatey.

Chemicals in this food

Red because you avoid sulfur and keep oxalates low — at these levels, each one alone makes it red.

Your active triggers
OOxalateHighLimit
SuSulfurMediumAvoid
Other chemicals in this food
HHistamineHighEat freely
FFODMAPLowEat freely
LLactoseFreeEat freely
Red lentils
Red lentils
Change your tolerance level for this food. Your choice will override the general settings.
Move to green listWorks well for me
Move to red listI avoid this
Save this
Minerals
Magnesium

Your body uses magnesium for your muscles, your nerves, and making energy. Falling short is surprisingly common, partly because processed diets tend to be low in it.

Where to get Magnesium
The richest sources among the foods you tolerate.
Pumpkin seedsExcellent source
AlmondsExcellent source
Black beansGood source
CashewsExcellent source
Show all 12
History
TriggersOverridesNotesSummary
July 2026?
438(+6) 41(+2) 27(+1)
Today
ZucchiniManual override14:02
Note addedApple · “Half an apple is fine”11:15
Histamine set to Limit14 foods moved09:41
Quiz completedPatterns detected: Oxalate, Sulfur09:12

Clear on what
you eat

Open any food to see which of the 7 chemicals it contains, and why it lands at your tolerance level.

A list that stays true to you

Move any food to green, yellow, or red whenever it matches how you really feel.

Well-nourished even on
a limited diet

Pick any nutrient, from iron to magnesium, and see which of the foods you tolerate have the most.

Your food history over time

Look back on how your list changes as you go.


Frequently asked questions

Anything else you'd like to know?

What do I get with Rio?

A personal food list of 500+ whole foods, each with your own tolerance level: from what works well to what's best avoided. You'll also see which foods on your list are the richest sources of each nutrient, so you can cover any gaps with foods you actually tolerate.

Is this a subscription?

No, the app is completely free.

Will this work for my specific intolerances?

Yes, whether you have one intolerance or several overlapping ones, the list is shaped around exactly the chemicals you react to. For each one, you decide how far to limit it in your diet.

Can I change the list to match how I really react?

Yes, and since everyone's reactions are a little different, you can change any food to match what your body actually tells you.

What if the food I'm looking for isn't in the list?

The app covers 500+ whole foods right now. If something's missing, just write to us at hello@riofoodplan.com and we'll add it.

Where does the food data come from?

The chemical content of every food is based on published scientific research and trusted data sources. Where the data disagrees, the more careful number is used.

Let’s find out what your body
thinks about food.

Download on the App Store

Free to download and use.