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Nourli is a research-grade nutrition and fasting instrument for iOS, Android, and web. Every calculated target (calories, BMR, TDEE, macros) traces back to a named equation and the peer-reviewed paper behind it; every food estimate from a photo shows its confidence and can be corrected in-line. Photos are processed in memory and never stored. A genuine free plan, then one premium price ($9.99/month) - no card to start, no upsell tiers, cancel anytime. The Coach reads your goals, patterns, fasting window and history and returns evidence-backed guidance with citations. Nourli shows its work - it does not claim accuracy it cannot prove, and there is no food database.

A nutrition & fasting instrument

The nutrition
instrument that
shows its work.

Logged in seconds. Every target cites its science. Every estimate shows its confidence.

Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone

The Nourli Today screen - calorie ring, water, and macros
01MethodPublic methodology
02PriceFree, or $9.99
03PrivacyPhotos never stored
04Evidence27 cited sources
01Why trust it

We show our work.
The math is on the table.

Three things have to be true at once for an instrument to be trusted. Each is verifiable, each is in the app, and the sources are public.

01
Targets cite their science.

Your daily calories, BMR, TDEE and macro split trace back to a named equation and the peer-reviewed source behind it: Mifflin‑St Jeor, Katch‑McArdle, and the rest, listed in full on the research page.

Calculated
02
Estimates show their confidence.

A photo becomes numbers with a confidence level you can read and correct. No “accurate” claim, no food database faking precision. The honesty is the point, not a caveat we hide.

Estimated
03
Photos are never stored.

Images are processed in memory and discarded. We keep the numbers, never the pictures. No image store, nothing to leak.

Discarded
02The loop

The whole loop.
Photograph, confidence, Coach.

01

Photograph any meal.

Open Nourli. One tap on the camera. Hold it over the plate. No search box, no database to scroll, no portion-size guess.

Nourli Today screen after photographing a meal
02

Logged with confidence shown.

Seconds later it is logged: calories, protein, carbs and fat, shown with how confident the estimate is. Anything off, you change it yourself.

Logged meal with calories, macros and a confidence level
03

The Coach tells you what to do next.

A conversation that already knows your context. The Coach reads your patterns, history, fasting window and goals, then tells you the next move. About your own numbers, not generic advice.

The Coach screen giving a next-step recommendation
03Show our work
27
Cited sources behind the numbers

Every calculated target links back to a named equation and the source behind it: peer-reviewed papers, clinical guidelines, and government dietary references. The full list is public.

Open the methodology

Most apps multiply BMR by 1.5.
This doesn’t.

Your targets run a layered engine: classical validated equations, modern peer-reviewed research, adaptive thermogenesis, body-composition caps, and 30 safety checks. Each one traces to a named source. From one goal it derives your calories, macros, fiber, sodium, sugar and water, and refuses any target that is unsafe.

BMR
Mifflin‑St Jeor, or Katch‑McArdle when body fat is known
TDEE
Activity model, or measured NEAT + the 2024 MET compendium
Protein
1.2–2.4 g/kg, scaled to goal, training and age
Deficit
Capped by body composition to protect lean mass
Surplus
Capped at 500 kcal (beyond that is fat, not muscle)
Floors
Never below 1,200 (F) / 1,500 (M) kcal
Safety
30 warnings; goals over 2 kg/week rejected outright
Every threshold traces to a named study. The full list is on the research page
04Honest by design

No fine print.
On privacy, or on price.

Privacy

Photos are processed,
then deleted.

Your meal images go to a vision model, the numbers come back, the image is dropped. We keep the readings, never the pictures. No image store, nothing to leak.

Photo retention
0 seconds
Stored copies
None
On our servers
Never
Pricing

One plan, one price.
Cancel anytime, your history stays.

Start free, no card. Your history is kept. The preview opens every premium feature. When it ends you settle onto the free plan with everything you logged. Premium is one price, $9.99/month. No upsell ladder, no dynamic pricing, no intro rate that quietly jumps. Cancel anytime.

Monthly
$9.99
Free plan
Yes, no card
Card to start
Not required
05The Coach · ✦

A precise guide,
it reads your day.

The Coach is the intelligence layer. It reads your readings: your goals, your fasting window, your protein at 16:00. Then it tells you the next move, in plain language.

  • ReadsYour history, goals, patterns, fasting window
  • ReturnsA specific next move, in plain language
  • RefusesPraise, gamification, motivational copy
  • ScopeYour data, not the open internet
Coach screen with a cited insight
06The instrument

Every screen
earns its place.

Three views you live in. Every number is a target with a source, or an estimate with its confidence. Nothing decorative.

Fasting · Stage dial
Fasting · Stage dialMetabolic stages, timed
Fasting history
Fasting historySix-week heatmap
Goals · Journey
Goals · JourneyDaily completion grid
Light & dark

Light and dark.
Both built from scratch.

Use it in light or dark. Each is designed deliberately, not a dimmed copy of the other.

Nourli light mode, Today in white
07Pricing

One transparent price.
It doesn’t move.

Premium · One price
$9.99/ month
Photo logging with the confidence shown on every reading
The Coach reads your data and answers with the source attached
Fasting tracker with custom plans and the metabolic-stage dial
Long-term analytics with the methodology in view
Web and Google Play, one account. iPhone soon
Free plan included · no upsell ladder · cancel anytime
Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone

08Questions

The questions
worth answering.

09Start

Read your nutrition.
The instrument is open.

Available on web and Google Play. iPhone soon.

Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone

A nutrition & fasting instrument

The nutrition
instrument that
shows its work.

Logged in seconds. Every target cites its science. Every estimate shows its confidence.

Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone

The Nourli Today screen - calorie ring, water, and macros
01MethodPublic methodology
02PriceFree, or $9.99
03PrivacyPhotos never stored
04Evidence27 cited sources
01Why trust it

We show our work.
The math is on the table.

Three things have to be true at once for an instrument to be trusted. Each is verifiable, each is in the app, and the sources are public.

01Calculated
Targets cite their science.

Daily calories, BMR, TDEE and macro split trace back to the exact equation and the peer-reviewed study behind it.

02Estimated
Estimates show their confidence.

A photo becomes numbers with a confidence level you can read and correct. No “accurate” claim, no food database faking precision. The honesty is the point, not a caveat we hide.

03Discarded
Photos are never stored.

Images are processed in memory and discarded. We keep the numbers, never the pictures. No image store, nothing to leak.

02The loop

The whole loop.
Photograph, confidence, Coach.

01

Photograph any meal.

Open Nourli. One tap on the camera. Hold it over the plate. No search box, no database to scroll.

Nourli Today screen after photographing a meal
02

Logged with confidence shown.

Logged in seconds: calories and macros, with the estimate’s confidence shown. Anything off, you change it yourself.

Logged meal with calories, macros and a confidence level
03

The Coach tells you what to do next.

A conversation that already knows your context. It reads your patterns, history and fasting window, then tells you the next move. About your own numbers.

The Coach screen giving a next-step recommendation
03Show our work
27
Cited sources behind the numbers

Most apps multiply BMR by 1.5.
This doesn’t.

Your targets run a layered engine: classical validated equations, modern peer-reviewed research, adaptive thermogenesis, body-composition caps, and 30 safety checks. Each one traces to a named source. From one goal it derives your calories, macros, fiber, sodium, sugar and water, and refuses any target that is unsafe.

BMRMifflin‑St Jeor, or Katch‑McArdle when body fat is known
TDEEActivity model, or measured NEAT + the 2024 MET compendium
Protein1.2–2.4 g/kg, scaled to goal, training and age
DeficitCapped by body composition to protect lean mass
SurplusCapped at 500 kcal (beyond that is fat, not muscle)
FloorsNever below 1,200 (F) / 1,500 (M) kcal
Safety30 warnings; goals over 2 kg/week rejected outright
Open the methodology Every threshold traces to a named study, listed on the research page
04Honest by design

No fine print.
On privacy, or on price.

Privacy

Photos are processed,
then deleted.

Your meal images go to a vision model, the numbers come back, the image is dropped. We keep readings, never pictures.

Photo retention0 seconds
Stored copiesNone
On our serversNever
Pricing

One plan, one price.
Cancel anytime; history stays.

Start free, no card. Your history is kept. The preview opens every premium feature. When it ends you settle onto the free plan with everything you logged. Premium is one price, $9.99/month. No upsell ladder, no dynamic pricing, no intro rate that quietly jumps. Cancel anytime.

Monthly$9.99
Free planYes, no card
Card to startNot required
05The Coach · ✦

A precise guide,
it reads your day.

The Coach is the intelligence layer. It reads your readings: your goals, your fasting window, your protein at 16:00. Then it tells you the next move, in plain language.

Coach screen
  • ReadsYour history, goals, patterns, fasting window
  • ReturnsA specific next move, in plain language
  • RefusesPraise, gamification, motivational copy
  • ScopeYour data, not the open internet
06The instrument

Every screen
earns its place.

Three views you live in. Every number is a target with a source, or an estimate with its confidence.

Fasting
FastingStage dial, timed
Fasting history
Fasting historySix-week heatmap
Journey
JourneyGoal completion grid
Light & dark

Light and dark.
Both built from scratch.

Use it in light or dark. Each is designed deliberately, not a dimmed copy of the other.

Light mode
07Pricing

One transparent price.
It doesn’t move.

Premium · One price
$9.99/ month
Photo logging with the confidence shown
The Coach answers with the source attached
Fasting tracker with custom plans + stage dial
Long-term analytics, methodology in view
Web and Google Play, one account. iPhone soon
Free plan included · no upsell ladder · cancel anytime
Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone

08Questions

The questions
worth answering.

09Start

Read your nutrition.
The instrument is open.

Available on web and Google Play. iPhone soon.

Get it onGoogle Play
Or use it on the web

Start free, every premium feature, no card · one account, web & phone