Best Apps to Track Weight Loss on Ozempic in 2026 (Beyond Just the Scale)

Search for "best app to track Ozempic weight loss" and you'll get a list of weight-loss apps with a Body Mass Index calculator and a calorie tracker. None of them answer the question that actually matters on a GLP-1: is the weight you're losing fat, or is it muscle?

The scale doesn't know the difference. A weekly drop of two pounds looks identical whether it came from the visceral fat around your liver or from the lean tissue in your quads. On a GLP-1 medication that suppresses appetite to the point that hitting protein becomes a daily project, that difference is the entire game. Lose fat and you reshape your body. Lose lean mass and you slow your metabolism, hollow out your face, and end up with a smaller, weaker version of the same composition.

This guide covers the 11 apps worth considering for tracking a GLP-1 transformation — including the ones marketed specifically to Ozempic users — and lays out the honest answer: no single app does the full job well. The right setup is a 4-input stack with a best-in-class app for each slot. Here's the stack.

1. Why one app isn't enough on a GLP-1

There are four things you need to track if you want to come out of a GLP-1 cut with a body that looks better, not just lighter:

Weight trend. The baseline. Day-to-day weight is noisy because of water and food in your gut; the weekly trend line is the signal. Any smart scale plus a free dashboard handles this.

Body composition. The fat-vs-muscle question. This is the slot that catches whether your transformation is healthy or hollow. Without composition data, you can't tell if a four-pound drop is great news or a warning sign.

Nutrition — protein especially. GLP-1s don't make people lose weight by magic. They suppress appetite to the point that most people end up in a 500–1,000 calorie deficit without trying. The same suppression makes hitting 1.6–2.2g of protein per kg of bodyweight an active project, not something that happens passively. Protein intake is the single biggest lever for preserving muscle on a cut. You need to track it.

Strength. The cleanest functional signal that muscle is preserved. If your three-rep max bench, your squat top set, and your pull-up count all hold or improve while you're losing weight, the muscle stayed. If they all crater, the muscle didn't. A workout logger gives you that signal.

No single app does all four well. Apps that try (Noom, Lose It!) are weight + calories trackers without composition depth. Apps that nail composition (GainFrame, Spren) don't track food. Apps that nail food (MacroFactor, MyFitnessPal) don't track composition. The "all-in-one GLP-1 tracker" doesn't really exist — and the ones that claim to are usually shallow on at least two of the four inputs.

So the working answer is a stack: pick one app per slot. Below is the slot map, then the eleven apps reviewed.

2. The 4-input stack

The four slots and the apps that fill them:

Slot 1 — Weight + dashboard. Apple Health (free) or Withings Health Mate (free with their scale). Don't pay for this slot. Any smart scale you already own will sync to a free dashboard.

Slot 2 — Body composition. The most important slot for GLP-1 users and the one that is missing from almost every weight-loss app. GainFrame, Spren, or SKOR. This is where you spend your subscription dollars if you can only afford one.

Slot 3 — Nutrition. MacroFactor or MyFitnessPal. The protein number is the lever that decides whether you keep muscle on a cut. GLP-1 appetite suppression makes that number harder to hit, not easier — which is exactly why tracking matters.

Slot 4 — Strength. Hevy or Strong. A free workout logger that records your top sets across the major lifts. If your numbers hold during the cut, the muscle held with them.

Now the apps, slot by slot.

3. The 11 apps reviewed

Slot 1: Weight + dashboard

1. Apple Health

Price: Free, iOS native

What it tracks: Weight, BMI, steps, sleep, heart rate, plus anything any other health app feeds it

Role in the stack: The free baseline dashboard everyone with an iPhone should already be using

Apple Health is the dashboard that ties everything else together. Any modern smart scale (Withings, Renpho, Eufy) will auto-sync your weight to it. Any food logger pushes calories. Any workout app pushes activity. The trend graphs are clean, the data is yours, and it doesn't cost anything.

Strengths: Free. Auto-syncs from every fitness app and most smart scales. Long-term trend data is properly visualized. Privacy is genuinely solid.

Limits: iOS only. Not a body composition tool — the BF% it shows comes from whatever you fed it, usually a noisy smart-scale BIA reading. The dashboard layout takes some configuring before it shows you what you actually want to see.

Best for: Anyone on iPhone. This is the free baseline.

2. Withings Health Mate

Price: Free with a Withings scale ($90+)

What it tracks: Weight, body fat (BIA), heart rate, sleep, body shape over time

Role in the stack: The companion app for the scale, which is the right scale to buy if you don't already own one

If you don't already have a smart scale, Withings is the one to buy. The hardware syncs weight automatically, the app gives you a clean weight trend, and a "Body Comp" feature shows your weight broken into estimated lean mass, fat mass, and water. The body composition number is BIA-based, so it's noisy day to day — but the trend over weeks is usable.

Strengths: Cleanest dashboard for daily weigh-ins. Auto-syncs to Apple Health. Great trend visualization. Affordable hardware.

Limits: The body composition number comes from BIA — fine for trends, not for absolute accuracy. Not a replacement for AI photo-based composition analysis.

Best for: People shopping for a smart scale. Buy a Withings, use Health Mate for the trend, and let it sync into Apple Health.

The weight trend (above, from GainFrame's integrated dashboard) is the input that drives everything else in the stack — but on its own it can't tell you what's actually being lost. That's where Slot 2 comes in.

Slot 2: Body composition (the GainFrame slot)

3. GainFrame

Price: Free base + $5.99/mo Pro, iOS

What it tracks: Body fat %, lean mass, FFMI, individual scores for 12 muscle groups, longitudinal trends, side-by-side comparisons

Role in the stack: The body composition slot — the answer to "is the weight I'm losing fat or muscle?"

GainFrame is built around the question that GLP-1 users actually need answered: where is the weight coming off? Every check-in photo produces a full Deep Dive — body fat percentage, FFMI, lean mass estimate, and individual scores for chest, shoulders, back, arms, abs, legs, and glutes. Track it weekly during the cut and you can see exactly which way the lean mass line is moving while the weight line drops.

The per-muscle-group breakdown is the feature that catches the failure mode that scale-based tracking can't see: asymmetric muscle loss. On a GLP-1, the legs are usually the first to go — they're the largest muscle group, they're often undertrained relative to upper body, and they're the easiest place for the body to pull amino acids from. A general "lean mass" number can hide leg loss for weeks. A muscle-group breakdown shows you the leg score dropping while the chest score holds, and you have time to intervene with more squats and more protein before the imbalance compounds.

Pricing: the base app is free and includes the full Deep Dive on every check-in. Pro ($5.99/mo) unlocks the unlimited timeline, advanced comparisons, and the future-physique projection — for GLP-1 users planning a 6–12 month cut, the unlimited timeline is the feature worth paying for.

Strengths: The most complete body composition picture available without a clinical scan. DEXA-validated within 0.4% on a published comparison. Per-muscle-group breakdown catches asymmetric loss. Free base tier. iOS native.

Limits: iOS only. Estimates from photos, not direct tissue measurement — accurate, but always an estimate. Doesn't track food, weight, or strength (intentionally — those slots have better tools).

Best for: Anyone on a GLP-1 who wants weekly evidence that the weight loss is fat, not muscle. The body composition slot in the stack.

4. Spren

Price: Paid subscription, iOS + Android

What it tracks: Body fat %, body composition metrics, VO2max estimate, structured front/back photo scan

Role in the stack: The body composition slot for cross-platform users

Spren takes a more clinical approach to AI body composition than GainFrame. The scan protocol is structured — front and back photos in form-fitting clothing, specific lighting, specific stance — so the inputs are more controlled. Output includes body fat percentage and a VO2max estimate. Designed for periodic assessment rather than weekly tracking, and the interface reflects that.

Spren is the right call if you're on Android, where GainFrame doesn't exist yet, or if you want a more clinical assessment format because you're working with a coach. The trade-off is depth: Spren outputs composition-level data (fat vs lean) without the per-muscle-group breakdown that catches asymmetric loss on a GLP-1.

Strengths: Cross-platform (iOS + Android). Structured scan protocol. DEXA-comparison framing in their marketing.

Limits: Subscription-only with no free tier. No muscle group breakdown. Designed for periodic assessment rather than weekly habit.

Best for: Android users, or people working with a coach who wants a structured scan format.

5. SKOR

Price: £2.99/wk to £39.99/yr

What it tracks: Body composition, face slimming tracker, skin laxity tracker — explicitly marketed to GLP-1 users

Role in the stack: Optional add-on for GLP-1 users who care about face and skin changes alongside body changes

SKOR is the only app on this list explicitly marketed to GLP-1 users, and they deserve credit for being first to claim that space. Their "GLP-1 Progress Mode" tracks face slimming, body contour, and skin laxity over time — the so-called "Ozempic face" concern that other body composition apps ignore entirely. For a meaningful slice of the GLP-1 audience, that's a legitimate gap they're filling.

The honest trade-off: SKOR's body composition depth is lighter than GainFrame's or Spren's. You don't get the per-muscle-group breakdown, and the body fat resolution is closer to a directional check-in than a precision measurement. The face/skin tracking is the differentiator — that's what you're paying £2.99/wk for, not body composition rigor.

The combined approach is the honest one: SKOR for face and skin tracking + GainFrame for body composition + Hevy for strength. Or, if face changes don't matter to you, just GainFrame + Hevy and skip SKOR.

Strengths: The only app addressing "Ozempic face" tracking. Explicitly built for GLP-1 users. Combines body, face, and skin in one workflow.

Limits: Body composition depth is lighter than dedicated tools. Subscription is steep at £2.99/wk for the resolution you get.

Best for: GLP-1 users who care about face and skin changes alongside body composition changes. An unusually large overlap with the audience.

Slot 3: Nutrition (protein is the muscle preservation lever)

6. MacroFactor

Price: $11.99/mo, iOS + Android

What it tracks: Calories, macros, adaptive metabolism estimate, protein targets

Role in the stack: The nutrition slot if you're serious about hitting protein during the cut

MacroFactor is the best nutrition tracker on the market right now, and it's especially well-suited to GLP-1 users. The standout feature is its adaptive metabolism estimate: instead of giving you a fixed calorie target based on a calculator, MacroFactor watches your actual weight changes against your actual food intake and adjusts its estimate of your maintenance calories week by week. On a GLP-1 — where appetite suppression often pushes people into a deeper deficit than they planned — this matters because the math keeps up with what's actually happening.

The protein targeting is the other lever. MacroFactor will set you a protein floor at 1.6–2.2g/kg depending on your goal, and the daily logger makes hitting that number a clear yes/no question. On a GLP-1, that floor is the difference between keeping muscle and losing it.

Strengths: Adaptive metabolism estimate is the best in category. Clean interface. Protein targeting is exactly what GLP-1 users need.

Limits: $11.99/mo with no free tier. Food database is smaller than MyFitnessPal's.

Best for: Anyone serious about hitting protein 1.6–2.2g/kg during a GLP-1 cut. The nutrition slot in the stack if you can pay for one.

7. MyFitnessPal

Price: Free + $19.99/mo Premium, iOS + Android

What it tracks: Calories, macros, weight, exercise — largest food database in the category

Role in the stack: The free nutrition option

MyFitnessPal has been around long enough that its food database is the biggest in the category — almost every restaurant, packaged food, and supermarket item is already in there. For people who don't want to type custom entries, that database alone makes it worth using. The free tier is genuinely usable for tracking calories and macros, though the premium tier ($19.99/mo) is more expensive than MacroFactor and the math under the hood is less sophisticated.

The honest comparison: MyFitnessPal wins on database size and the free tier; MacroFactor wins on the math behind the calorie target and the adaptive metabolism. For a GLP-1 user who wants to avoid a paid subscription, the MyFitnessPal free tier covers the basics — log your food, hit your protein floor, watch the trend. For a GLP-1 user paying for one nutrition app, MacroFactor is the better choice.

Strengths: Largest food database. Genuinely usable free tier. Cross-platform.

Limits: Less sophisticated calorie math than MacroFactor. Premium tier is more expensive than MacroFactor for less functionality.

Best for: Budget-conscious users who want a free option, or anyone who eats out a lot and needs the broadest database.

Slot 4: Strength (the muscle preservation proof)

8. Hevy

Price: Free + $4.99/mo Pro, iOS + Android

What it tracks: Sets, reps, weights, workout history, top set progression

Role in the stack: The strength slot — the cleanest functional signal that muscle is preserved

Hevy is the cleanest workout logger available right now. Free tier handles unlimited workouts, full exercise library, and progression tracking. Pro ($4.99/mo) adds advanced analytics and unlimited routine slots. For a GLP-1 user, the value is simple: log your top set on the major lifts every session, and watch the trend during your cut.

If your bench, squat, and pull-up numbers hold or improve while your weight drops, the muscle held. If those numbers crater alongside the weight loss, the muscle didn't. Strength is the cleanest functional proof of muscle preservation, and Hevy makes the logging frictionless enough that it actually happens.

Strengths: Free tier covers everything most people need. Clean interface. Cross-platform.

Limits: Doesn't tell you about composition or nutrition — it's strength only, by design.

Best for: Anyone lifting weights during a GLP-1 cut. The strength slot in the stack.

9. Strong

Price: Free + $4.99/mo Pro, iOS + Android

What it tracks: Sets, reps, weights, workout history

Role in the stack: Alternative strength logger if you prefer Strong's UI

Strong does the same job as Hevy with a different interface. Pricing is identical, the feature set is comparable, and the choice between them comes down to which UI you find more pleasant to use during a workout. Both will give you a clean record of your top sets across the major lifts.

Strengths: Same core functionality as Hevy. Slightly different interface preferences.

Limits: Same — strength only, by design.

Best for: People who prefer Strong's interface over Hevy's.

Cross-cutting all-in-ones (the temptation)

10. Lose It!

Price: Free + $39.99/yr Premium, iOS + Android

What it tracks: Calories, weight, food log, basic exercise

Role in the stack: Tempting but falls short — covers Slot 1 + Slot 3 only, not body composition or strength

Lose It! is a popular general-purpose weight-loss app. It tracks weight and calories, has a barcode scanner, and produces a tidy weight-loss timeline. For someone whose only goal is weight on the scale, it's a competent tool.

For a GLP-1 user, it's not enough. There is no body composition tracking, no per-muscle-group breakdown, no strength logger. You can use Lose It! to track calories and weight during your cut, but you'd still need a body composition tool and a workout logger to know whether the cut is working. At that point you might as well use MacroFactor for nutrition and skip the all-in-one framing.

Best for: Pre-GLP-1 users tracking weight loss the old-fashioned way. Less useful once muscle preservation enters the picture.

11. Noom

Price: ~$70/mo

What it tracks: Calories, weight, behavior change content, daily psychology lessons

Role in the stack: Behavior-change program, not a body composition tracker

Noom is a psychology-based weight-loss program with a tracking app attached. The product's main value is the behavior-change content — daily lessons designed to help you build sustainable habits around food. The tracking layer (calories, weight) is competent but not the focus.

For GLP-1 users, the gap is the same as Lose It!: no body composition tracking, no muscle group data, no strength logger. The price (~$70/mo) is also significantly higher than MacroFactor, MyFitnessPal Premium, or any of the body composition tools. The behavior-change content can be valuable for people who specifically want that, but it doesn't replace the four-input stack.

Best for: People who specifically want behavior-change coaching. Not a substitute for body composition tracking on a GLP-1.

4. Comparison table

5. SKOR in particular: the GLP-1-specific app

SKOR deserves its own section because they're the only app in this list explicitly marketed to GLP-1 users, and the angle is worth considering on its own terms.

What SKOR does well. Their "GLP-1 Progress Mode" tracks face slimming, body contour, and skin laxity over time. The "Ozempic face" concern is genuinely real for a meaningful slice of GLP-1 users — rapid fat loss in the face shows up before it shows up anywhere else, and most body composition apps either ignore the face entirely or treat it as a secondary metric. SKOR makes face and skin changes a first-class feature, and that's a legitimate gap they're filling.

What SKOR does less well. Body composition depth is lighter than GainFrame or Spren. There's no per-muscle-group breakdown, the body fat resolution is more directional than precise, and £2.99/wk is steep for the body composition rigor you get. For users whose primary concern is whether the cut is preserving muscle, SKOR isn't the right tool for that question — it's the right tool for the parallel question of how the face and skin are changing.

Best for: GLP-1 users who care about face and skin changes alongside body changes. That's an unusually large overlap with the audience, which is part of why SKOR's positioning works.

The combined approach. If you care about all of it, the honest stack is SKOR for face and skin + GainFrame for body composition + Hevy for strength + MacroFactor for nutrition. If face changes don't matter to you, drop SKOR and you're at GainFrame + Hevy + MacroFactor. The point is that SKOR fills a real slot for a real subset of GLP-1 users — but it isn't the all-in-one tracker the marketing implies.

6. The free-only stack

For someone who refuses to pay for any of this:

Slot 1 — Weight. Apple Health (free). Pair with whatever smart scale you have, or with manual entries from a $20 dumb scale.

Slot 2 — Body composition. Free progress photos, taken in consistent conditions weekly. We have a separate guide on the best free progress photo apps — the short version is that any of them give you a visual record but none give you composition data. This is the slot where the free-only stack has a real gap.

Slot 3 — Nutrition. MyFitnessPal free tier. Database is huge, calorie and protein tracking work fine without paying.

Slot 4 — Strength. Hevy free tier. Unlimited workouts, full exercise library, progression tracking. The free tier is genuinely usable.

This stack catches roughly 70% of what a paid stack catches. The missing piece is body composition data — there's no free-tier replacement for AI photo-based composition analysis. You can document your transformation visually with progress photos, but you can't quantify the fat-vs-muscle split without paying for one of the body composition tools.

7. The honest verdict

Most GLP-1 users will end up paying for one or two apps in the stack. The two slots worth paying for are body composition and nutrition — together those are the slots where free options either don't exist or fall meaningfully short of the paid alternatives.

The minimum spend that covers the full stack: $5.99/mo (GainFrame Pro) + $11.99/mo (MacroFactor) = $17.98/mo. Apple Health handles weight for free. Hevy free tier handles strength. Total cost: under $18/mo for body composition tracking that catches asymmetric muscle loss, adaptive nutrition tracking that hits your protein floor, weight trend analysis through Apple Health, and strength logging through Hevy.

That's the honest stack. No single app does it all, and the apps that claim to are usually shallow on at least two of the four inputs. Pick the best tool per slot, layer the data, and the question "is the weight I'm losing fat or muscle?" stops being a guess and becomes something you can actually answer.

A note: this isn't medical advice — talk to your doctor about the medication itself. The app stack above is for anyone already on a GLP-1 who wants better data than the scale alone.