Guide
The Best Fitness Apps for GLP-1 Users in 2026 (Muscle-First, Honestly Ranked)
By Alen Yaco ·
Search "GLP-1 apps" and you'll find a wall of shot trackers — apps for logging injections, side effects, and weigh-ins. Useful, but they solve the easy problem. The hard problem on semaglutide, tirzepatide, or any GLP-1 is the one the research keeps flagging: keeping your muscle while the weight comes off. Without countermeasures, lean mass can account for roughly a quarter to 40% of total weight lost, and a study presented at ENDO 2026 found that adults on GLP-1s actually decreased their physical activity — the opposite of what preserving muscle requires.
So this list is ranked muscle-first: the apps that get you resistance training, hitting protein, and staying consistent, with the shot-tracking category covered honestly at the end. Full disclosure: we build ROID, and it's first here. Every price was verified in August 2026, and the medical side of GLP-1s — how the drugs work, side effects, the compounding gray market — is covered in our separate peptides for weight loss guide.
The three jobs your apps need to do on a GLP-1
The evidence on protecting muscle during rapid weight loss is boring and consistent, and it defines the checklist:
- Resistance training, two to four times a week. Lifting is the signal that tells your body to keep muscle while in a deficit. An app earns its place here by making training happen — programming it, adapting it, and making it visible to people who notice when you skip.
- Enough protein, every day. Commonly cited targets land near 1.6 g per kg of body weight per day — genuinely hard to hit when a GLP-1 has flattened your appetite. Tracking isn't optional here; with a suppressed appetite you will undereat protein by accident, not by choice.
- Adherence you can see. Appetite suppression does the eating-less part for you. What's left — showing up to train, eating enough of the right things — is an adherence problem, and adherence improves when it's tracked and social.
One app can cover the first two jobs and most of the third. A dedicated shot tracker is a reasonable fourth tool; it's just not the part that protects your muscle.
The short version
| App | Price (Aug 2026) | Training | Protein tracking | Shot tracking | Best for |
|---|---|---|---|---|---|
| ROID | Free core; AI on free monthly credits | AI-generated, adaptive | Yes — AI photo logging | — | The muscle-preservation stack in one app |
| Shotsy | Free core | — | — | Yes — the specialist | Dose schedules, levels, doctor PDFs |
| Cronometer | Free tier | — | Yes, plus micronutrients | Basic | Nutrient quality on small portions |
| Hevy | Free; Pro $2.99/mo | You program it | — | — | Lifters who know their plan |
| MyFitnessPal | Free (5/day cap); Premium $79.99/yr | — | Yes (Premium for scan/AI) | New in 2026 | Database depth, if you'll pay |
| Berry Street | Typically billed via insurance | Via dietitian | Via dietitian | Clinical | Human, medical-grade support |
1. ROID — the muscle-preservation stack in one free app
The GLP-1 checklist is two jobs — train and hit protein — and ROID is built to do both in one place, free. The AI generates and adapts strength training from your goal, equipment, and logged workouts; meals log by photo or text with protein and macro estimates; and both live in the same profile, so the AI can see whether this week's protein actually supports this week's training. That connection is the point: on a GLP-1, "am I eating enough protein for what I'm asking my body to do?" is the question, and apps that only see one side of it can't answer.
The AI runs on free credits that renew monthly (unlimited is earnable free by inviting friends, with an optional plan for heavy users), and the social feed covers the adherence job — your training is visible to people who notice when you stop. Honest limits: iOS only (iOS 18+), no shot tracking — pair it with Shotsy below if you want dose logging — and its food estimates come from AI photo analysis, which trades some precision for speed (see our accuracy breakdown).
Pick ROID if you want the training, protein, and accountability jobs handled together without a subscription.
2. Shotsy — the shot tracker that does its one job well
Of the dedicated GLP-1 trackers, Shotsy is the standout: free core tracking for every major GLP-1 medication, dose schedules, estimated medication-level charts, home-screen widgets, and doctor-ready PDF exports for appointments. It makes no attempt to be a fitness app — which is exactly why it pairs well with one.
Pick Shotsy if you want clean dose logging and reports alongside whatever handles your training and food.
3. Cronometer — nutrient quality when you're eating less
Here's the under-discussed GLP-1 problem: when appetite suppression drops you to small portions, every bite has to carry more nutrition, and deficiencies become easy. Cronometer's verified database and deep micronutrient tracking — dozens of vitamins and minerals most apps ignore — is the best free tool for making a small diet a complete one. No training side at all.
Pick Cronometer if you want lab-grade visibility into whether your reduced intake still covers protein and micronutrients.
4. Hevy — the free lifting log
If you already have a program and just need the resistance-training job logged, Hevy remains the cleanest free strength logger, with a friends feed for the visibility that keeps you honest. It won't program anything or track food — it's one job, done excellently, free (Pro is $2.99/month with a $74.99 lifetime option).
Pick Hevy if you know your training and want a free, social log next to a nutrition app.
5. MyFitnessPal — the database, now with GLP-1 support
MyFitnessPal's August 2026 Summer Release added GLP-1 support and progress tracking, plus an AI Coach for meal guidance — a clear signal that the biggest name in food logging is building for this exact audience. The catches are the usual ones: the free tier caps you at five food entries a day, and the useful tools (barcode, Meal Scan, the AI Coach) are Premium at $79.99/year. And there's still no training side. We've broken down whether Premium is worth it separately.
Pick MyFitnessPal if verified database depth matters most and you're willing to pay Premium for the conveniences.
6. Berry Street — when you want a human in the loop
Apps have limits, and a GLP-1 prescription is medical care. Berry Street pairs you with a registered dietitian — typically billed through insurance — and it's been consolidating fast: in August 2026 it merged with Healthify, one of the larger nutrition-coaching platforms, operating under the Berry Street name in the US. For side-effect management, medically complicated cases, or anyone who wants their protein target set by a professional who can see their labs, this is the tier above any tracker.
Pick Berry Street if you want clinical, human nutrition support and your insurance covers it.
How to build your stack
Most people need two apps, not six. The simplest complete stack: ROID for training, protein, and accountability, plus Shotsy for doses — both free at the core. The precision stack: Cronometer for food, Hevy for lifting, Shotsy for doses — three free single-job tools, more manual glue. The paid-database stack: MyFitnessPal Premium plus a training app, if the verified database is non-negotiable. The clinical stack: Berry Street plus whichever tracker your dietitian prefers. Whatever you choose, the test is the same: three months from now, are you still lifting twice a week and hitting your protein number? The drug handles the appetite. The apps exist to protect everything else.
Frequently asked questions
What is the best fitness app for GLP-1 users?
For the muscle-preservation side — the part that actually needs managing — ROID covers the three jobs at once, free: AI-adapted strength training, photo protein logging, and social accountability. Pair it with Shotsy if you also want dedicated dose tracking. If you prefer single-purpose tools, Cronometer (nutrition) plus Hevy (lifting) is a strong free combination.
How do I avoid losing muscle on a GLP-1 like Ozempic or Zepbound?
Two countermeasures carry the evidence: resistance training two to four times a week, and adequate daily protein — commonly cited targets are around 1.6 g per kg of body weight. Without them, lean mass can make up roughly 25–40% of the weight lost. Tracking both matters because appetite suppression makes accidental protein under-eating the default.
Do I need a special GLP-1 app?
A dedicated shot tracker like Shotsy is genuinely useful for dose schedules, side-effect logs, and doctor-ready reports, and the category is mostly free. But shot tracking is the easy job — it doesn't protect your muscle. Prioritize the apps that get you training and hitting protein, then add a shot tracker alongside.
How much protein should I eat on a GLP-1?
Commonly cited targets for preserving muscle during medication-assisted weight loss land near 1.6 g per kg of body weight per day, spread across meals. It's a demanding target when your appetite is suppressed, which is why tracking protein — by photo logging or a database app — matters more on a GLP-1 than in almost any other situation. Confirm your personal target with your prescriber or dietitian.