SlimAI vs Noom: Tracker or Coaching Programme?
These two apps are not the same category, and comparing them on features alone hides the decision you are actually making. Noom sells a behaviour-change programme: daily psychology lessons, colour-coded food groups, and human coaching, priced accordingly. SlimAI Calorie Tracker sells a tracking tool: fast AI logging, personalized targets, body composition estimation, and habit tracking, priced as an app.
That means the honest question is not which app has more features. It is whether the daily lessons and the coach are what keep you consistent, or whether what you actually need is to know what you ate and what it cost you, in seconds, every day.
SlimAI is also the first AI calorie tracker with a built-in AI body fat calculator (based on publicly available feature listings, July 2026): AI Body Assessment estimates body fat percentage from two photos, so progress is not measured only by the scale Noom is organised around.
Every row below is dated and drawn from publicly available feature descriptions. Where Noom leads, the row says so.
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Quick Verdict: SlimAI vs Noom
Choose Noom if the coaching relationship and the daily curriculum are what get you to log at all. That is a real mechanism, no tracker on the market replaces it, and switching away to save money usually ends with you tracking nothing.
Choose SlimAI if you already understand a calorie deficit and want to execute one without homework — with faster logging, gram-level macro targets, fasting, water, steps and workouts included, and a body fat estimate the scale cannot give you, at about $1 a month.
The test worth running before you decide: over the last month, did you open Noom for the lesson and the coach, or only to log food? If it was only to log food, you are paying programme prices for a tracker.
Where SlimAI Comes Out Ahead
Across 23 points of comparison, SlimAI leads on 16, is comparable on 5, and Noom leads on 2. The four differences below are the ones that change how your day actually goes.
Progress that is not just the scale
AI Body Assessment estimates body fat percentage, fat mass, lean mass, and regional fat distribution from two photos, or from tape measurements with no photos. Weight moves for reasons unrelated to fat — water, food volume, training load — which is why a weight-only view discourages people in exactly the weeks composition is improving. Public Noom pages describe weight-based progress tracking; no photo-based body fat estimate is listed, as of July 2026. Results are estimates for fitness awareness, not measurements or medical advice.
Logging measured in seconds, not minutes
Photo, voice, free text, barcode, printed nutrition label, and database search, with every AI result opening as an editable list of ingredients and weights before it saves. The daily cost of tracking is what decides whether anyone is still doing it in week six.
One tier, no coaching upsell
Calories, macros, fasting, water, steps, workouts, weight, and body composition sit in a single SlimAI Premium tier at $1.49/month or $11.99/year — about $1 a month. There is no second plan to move to once you are inside.
Targets you can override
A short guided setup turns your goal, pace, target weight, body type, activity level, preferred diet, and cuisine into a daily calorie goal with gram-level protein, carb, and fat targets — and every one of those numbers can be replaced with your own.
Seen enough? Try SlimAI against Noom yourself.
Log the same three days in both. Free 3-day trial, then $11.99/year — about $1 a month.
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SlimAI vs Noom: Feature-by-Feature Comparison
Each row names what both apps offer and who it favours. Rows where Noom leads are marked as clearly as the rows where SlimAI does.
| What you are comparing | Noom | SlimAI |
|---|---|---|
| AI logging | ||
| Main positioningA coaching programme and a tracking tool solve different problems; picking the wrong one wastes months.Comparable | NoomA behaviour-change programme: daily psychology lessons, food categorisation, and human coaching wrapped around a food log. | SlimAIA tracking tool: AI logging, personalized targets, habits, and body composition in one app, with no curriculum to keep up with. |
| Ways to log a mealThe number of routes into the log decides whether an awkward meal gets recorded or skipped.SlimAI advantage | NoomSearch and barcode logging are the documented core, with photo logging referenced on public pages. Voice and free-text entry are not listed, as of July 2026. | SlimAISix: photo, voice, free text, barcode, printed nutrition label, and database search, plus recent foods, saved foods, and diet-plan logging. |
| Correcting a wrong estimateAn AI guess on a mixed plate will sometimes be wrong; what happens next decides whether the habit survives.SlimAI advantage | NoomEntries are edited by adjusting servings or choosing a different database item; ingredient-level editing of an AI result is not described on public pages, as of July 2026. | SlimAIIngredient-level editing with weights, an add-missing-ingredient database, Similar Foods, a Fix Results screen for restating the dish, and a serving stepper that recalculates live. |
| Regional and home-cooked foodMost people do not eat food that maps cleanly onto a database entry.SlimAI advantage | NoomA large general food database, with coverage strongest for US packaged and restaurant items. | SlimAIFavourite cuisine and region are setup inputs that shape suggestions, and any missing ingredient can be added to the entry by hand. |
| Goals & guidance | ||
| Behavioural coachingFor many people the reason tracking fails is not information, it is adherence.Noom leads | NoomHuman coaching and a structured daily psychology curriculum are the core of the product, and are the reason to choose it. | SlimAINo human coaching and no lesson curriculum. Guidance is in the numbers: per-meal calorie ranges, Better Choice swaps, and streaks. |
| Daily lessonsEducation helps some users and is homework for others.Noom leads | NoomDaily lessons on eating psychology, habit formation, and food environment are a documented part of the programme. | SlimAINone. SlimAI assumes you already know what a calorie deficit is. |
| Setting daily targetsA target you cannot change is a target you will eventually ignore.SlimAI advantage | NoomA calorie budget is generated from your profile and goal. Public pages do not describe gram-level macro target setting, as of July 2026. | SlimAIGenerated from goal, pace, target weight, body type, activity level, preferred diet, cuisine, and optional health details — and fully overridable, including gram-level macro targets. |
| Per-meal guidanceA single daily number does not tell you what is still available at dinner.SlimAI advantage | NoomProgress is shown against the daily budget and the food colour categories rather than per-meal ranges. | SlimAIEach meal gets a recommended calorie range and a live status — Over Limit, Not taken, Need to Eat, or Optional. |
| Nutrition depth | ||
| Macro trackingAnyone training seriously needs protein, carbs and fat as separate targets, not one calorie number.SlimAI advantage | NoomMacronutrients are visible, with the food colour system carrying most of the guidance. Gram-level macro goal setting is not described on public pages, as of July 2026. | SlimAIProtein, carbohydrate and fat in grams and percent across meals, recipes, the dashboard, and weekly Insights, against targets you set. |
| Food quality signalCalories alone treat 400 calories of chicken and 400 of pastry identically.Comparable | NoomThe colour-coded food category system is a well-known and effective quality heuristic, and is central to how the programme teaches food choice. | SlimAIA junk-level food health rating plus percent-of-daily-value rows for sugar, saturated and unsaturated fat, cholesterol, sodium, and potassium. |
| Ingredient-level detailA calorie figure you cannot inspect is a figure you cannot correct.SlimAI advantage | NoomEntries show nutrition totals; ingredient-level breakdowns of a logged dish are not described on public pages, as of July 2026. | SlimAIEvery food opens with each ingredient and its weight listed, editable or removable, plus Recipe and Nutrition Facts tabs with cooking time and directions. |
| Habits & wellness | ||
| Intermittent fastingFasting in a separate app means a separate subscription and a broken daily picture.SlimAI advantage | NoomNo built-in intermittent fasting tracker is listed on public pages, as of July 2026. | SlimAISix plans — 14:10, 16:8, 20:4, 22:2 OMAD, 6:1, 5:2 — with fasting-window reminders scheduled server-side. |
| Water trackingHydration is the easiest habit to log and the easiest to forget.SlimAI advantage | NoomWater can be recorded, without utensil-based quantities or a suggested intake. | SlimAIUtensil-based logging — jug, bottle, mug, glass, each with a custom quantity — against a daily goal, with drink history. |
| Steps and workoutsMovement changes the daily balance, so it belongs in the same app as the food.SlimAI advantage | NoomExercise is logged and syncs from connected devices and health platforms. | SlimAIWorkout logging plus steps synced from Apple Health or Health Connect, a user-set step goal, back-dated exercise entry, and an Add Back Calories Burned setting you control. |
| Streaks and consistencyConsistency is the variable that actually predicts results.Comparable | NoomStreaks, check-ins, and coach contact all support consistency, and the coaching contact is a stronger mechanism than a notification. | SlimAILongest streak, logged days, perfect days, goal-reached days, and achievements, with server-scheduled reminders that arrive even after days of inactivity. |
| Body compositionWeight alone cannot tell you whether what you lost was fat.SlimAI advantage | NoomWeight, and body measurements where entered. No photo-based body fat estimate is listed on public pages, as of July 2026. | SlimAIAI Body Assessment estimates body fat percentage, fat mass, lean mass, and regional distribution from two photos or from tape measurements, shown as a likely range with a confidence rating. |
| Transparency & control | ||
| How estimates are producedA number you cannot audit is a number you have to take on faith.SlimAI advantage | NoomProgramme content cites nutritional and behavioural science; a per-estimate calculation disclosure is not described on public pages, as of July 2026. | SlimAIAn in-app Sources & References screen discloses the basis for calorie, portion, and burn estimates, and Body Assessment names its formulas — US Navy circumference method, RFM, CUN-BAE. |
| Editing before savingWhether the user or the model has the final word decides how much the log can be trusted.SlimAI advantage | NoomServings and the chosen database item can be adjusted before logging. | SlimAINothing saves until you have seen the ingredients, weights, and serving, and every one of them can be changed first. |
| Language supportTracking in a second language adds a translation step to every meal.SlimAI advantage | NoomPublic listings are primarily English-language, with the coaching programme delivered in English, as of July 2026. | SlimAISeven languages — English, French, German, Italian, Spanish, Dutch, Arabic — including spoken guidance during a body scan. |
| Pricing & access | ||
| What the subscription buysThe two products are priced for different things, and this is the row most people are here for.SlimAI advantage | NoomPriced as a coaching programme rather than an app subscription, reflecting the human coach and curriculum. Check the current listing — programme pricing changes and varies by offer. | SlimAIOne tier at $1.49/month or $11.99/year — about $1 a month — covering AI logging, macros, fasting, water, steps, workouts, progress, and AI Body Assessment. 3-day free trial, nothing charged during it. |
| Free trial and cancellationTrial terms and how easy cancelling is are both part of the price.Comparable | NoomA trial period is offered. Billing and cancellation terms are set by the provider; check the current terms before subscribing. | SlimAI3-day free trial, then the chosen plan renews unless cancelled. Billing is handled by Apple or Google and cancelled in your store account — no email, no support ticket. |
| Number of apps neededA second subscription for fasting or water is a real cost.SlimAI advantage | NoomThe programme covers food and activity; fasting and utensil-level water tracking would need another app. | SlimAIOne app and one tier covers food, fasting, water, steps, workouts, and composition. |
| Data portabilitySwitching costs are real and neither app hides them.Comparable | NoomHistory stays in Noom and does not transfer to another tracker. Export what you want to keep before cancelling. | SlimAINo import of another app diary history. Weight trend, streaks, and insights build from your first log; Body Assessment gives a composition baseline in the first session. |
Comparison based on publicly available information as of July 2026. Competitor features and pricing may change — check their official sites for the latest.
Coaching vs Tracking: Which Problem Do You Actually Have?
Almost everyone who compares these two apps frames it as a price question, and almost everyone is asking the wrong question first. The price gap is real, but it reflects a genuine difference in what is being sold: a human coach and a structured curriculum cost money to deliver, and an app does not.
The useful question is which mechanism is doing the work for you. If you have started and stopped tracking four times and what changed on the fifth attempt was a coach checking in, that is not a feature you can replace with a cheaper subscription. Noom is the right answer and switching will cost you the progress.
If, on the other hand, the lessons went unread and the coach messages went unanswered while you logged food every day, you are paying programme prices for the tracking layer. That is the case where SlimAI does the same daily job for about a dollar a month, and does several things the tracking layer of a coaching programme does not attempt.
Food Logging Speed: Where the Daily Difference Shows Up
Tracking fails on time cost. A meal that takes three minutes to log gets logged on a good day and skipped on a busy one, and a week with four skipped meals is a week of data you cannot act on.
SlimAI is built to collapse that cost: photograph the plate, speak the meal, type it in plain language, scan a barcode, scan a printed nutrition label, or search. Whatever comes back opens as an editable list of ingredients with weights, so correcting a wrong result takes seconds rather than restarting the entry.
Noom logging is search-and-barcode led, with the colour-category system layered on top to teach food choice as you go. That system is genuinely effective at changing what people reach for — it is the part of the programme users remember years later — but it does not make the act of logging faster.
Measuring Progress Beyond the Scale
Noom is organised around weight. Weight is a legitimate outcome measure and a terrible weekly one: it moves with water, food volume, sodium, training load, and hormonal cycles, which is why people quit in the exact weeks their body composition is improving.
SlimAI adds a second signal. AI Body Assessment reads six tape-style measurements from two guided photos and computes body fat percentage, fat mass, lean mass, and regional fat distribution using published formulas — the US Navy circumference method, RFM, and CUN-BAE — presented as a likely range with a confidence rating. A tape-measure mode produces the same output with no photos at all.
Photos are stored privately, encrypted in transit, EXIF-stripped, and permanently deleted on request. Body Assessment supports ages 18+ and is a science-based estimate for fitness purposes, not a medical diagnosis or a clinical body composition measurement.
Who Should Choose SlimAI?
Someone who already understands a calorie deficit and wants to execute one without a curriculum. Someone who stopped tracking because logging took too long rather than because they lacked motivation. Someone who wants fasting, water, steps, workouts, and body composition in the same subscription as the food log. Someone tracking macros to a gram for training. Someone who wants the cost to look like an app subscription.
Who Might Choose Noom?
Someone for whom accountability is the binding constraint, not information. Someone who has found that a coach relationship is what sustains the habit. Someone who values structured education about eating psychology and food environment, and will actually read it. Someone who has tried self-directed tracking repeatedly and knows from experience that it does not hold.
Those are real reasons and no calorie tracker substitutes for them. If they describe you, staying is the better decision even though it costs more.
Switching from Noom to SlimAI
The transition is mostly about replacing a structure you were given with targets you control. Four things to expect.
Your history stays behind
No calorie tracker imports another app diary, SlimAI included. Export anything from Noom you want to keep before cancelling. Weight trend, streaks, and insights rebuild from your first SlimAI log.
Setup replaces the intake questionnaire
A short guided setup — goal and pace, target weight, body type, activity level, preferred diet, favourite cuisine, and any health details you choose to share — produces your daily calorie goal and gram-level macro targets. All of it stays editable afterwards.
Get a composition baseline on day one
Run AI Body Assessment in the first session, by photos or tape measurements. That gives you a body fat, fat mass, and lean mass starting point immediately, rather than waiting weeks for a weight trend to mean anything.
Replace the coach with structure you set
Turn on meal, water, fasting, and streak reminders — they are scheduled server-side and arrive even if the app has been closed for days. They are not a coach. If a coach is what kept you consistent, be honest with yourself about that before you cancel.
What SlimAI costs after the trial
$11.99 a year — roughly $1 a month — for one tier that covers AI scanning, body fat estimates, fasting, water, workouts, diet plans, and progress. Monthly is $1.49. Both start with a 3-day free trial and cancel from your store account.
Was $4/month (63% off) and $48/year (75% off). Noom pricing changes independently — check its current store listing before comparing.
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FAQ
Still Wondering About SlimAI
SlimAI Premium is $1.49/month or $11.99/year — about $1 a month — after a 3-day free trial, with nothing charged during the trial. Noom is priced as a coaching programme rather than an app subscription, which reflects the human coach and daily curriculum it includes. Check Noom current listing for its pricing, which changes and varies by offer. The two are not priced for the same thing.
No. SlimAI has no human coaches and no daily psychology curriculum. Its guidance is structural rather than personal: per-meal calorie ranges with a live status for each meal, one-tap Better Choice swaps, streaks and perfect days, and server-scheduled reminders that arrive even after days of inactivity. If a coaching relationship is what keeps you consistent, SlimAI is not a replacement for it.
Both depend on the same mechanism — a sustained calorie deficit — so the better app is whichever one you actually keep using. Noom invests in adherence through coaching and education. SlimAI invests in removing daily friction and in showing progress as body composition rather than weight alone. If you have historically stopped tracking because it took too long, SlimAI addresses that; if you have stopped because motivation faded, Noom addresses that. Neither app is a medical or disease-management tool, and anyone with a health condition should consult a qualified healthcare professional.
SlimAI is the first AI calorie tracker with a built-in AI body fat calculator, based on publicly available feature listings as of July 2026. AI Body Assessment estimates body fat percentage, fat mass, lean mass, and regional fat distribution from two guided photos using the US Navy circumference method, RFM, and CUN-BAE, or from tape measurements with no photos. Results appear as a likely range with a confidence rating. Public Noom pages describe weight-based progress tracking and do not list a photo-based body fat estimate, as of July 2026.
Yes. Six plans — 14:10, 16:8, 20:4, 22:2 OMAD, 6:1 and 5:2 — with fasting-window reminders, in the same SlimAI Premium tier as calorie tracking, water, steps, workouts, and AI Body Assessment. No built-in fasting tracker is listed on public Noom pages as of July 2026.
Your logged history stays in Noom and does not transfer — no tracker on the market imports another app diary, SlimAI included. Export what you want to keep before you cancel. In SlimAI, weight trend, streaks, and insights build from your first log, and AI Body Assessment gives you a body composition baseline in the first session rather than waiting for a trend to form.
Make the switch from Noom with AI Meal Logging.
Log your next meal in SlimAI and see the difference on day one. Free for three days.
Free 3-day trial, then $1.49/month or $11.99/year. Cancel anytime.
- 50K+ food items in the food database
- 50k+ users
- 10M+ foods logged
- 80+ countries
- 4.8★ App Store · 4.6★ Google Play (as of June 3, 2026)
