Shotsy App Review (2026): What It Costs, What It Nails, and the One Thing It Can't Track

This article is for information only and is not medical advice — talk to your prescriber before changing your medication, diet, or exercise. Disclosure: Tiro is our app, and this review reflects hands-on testing of Shotsy alongside several other GLP-1 trackers.

Shotsy is worth installing if what you want is a free, reliable shot log and a weight graph: it's rated 4.8 out of 5 from 29K ratings on the US App Store, and the core dose, side-effect, weight and nutrition logging costs nothing (App Store listing, checked 5 August 2026). It's worth paying for only if you specifically want the medication-level curve behind its subscription. What no Shotsy tier can give you is whether the weight you're losing is fat or muscle — a weight graph can't separate the two. Body-composition sub-studies attribute a meaningful share of GLP-1 weight loss to lean tissue: about 26% on tirzepatide in SURMOUNT-1, closer to 40% on semaglutide in STEP 1. So if muscle matters to you, pair or replace Shotsy with a tracker that measures body composition and protein.

What is Shotsy, and who is it for?

Shotsy is a weekly-injection logger built for people on GLP-1 medications: semaglutide (Ozempic, Wegovy, Rybelsus), tirzepatide (Mounjaro, Zepbound), and, as of its more recent "Maintenance Mode" updates, oral GLP-1 pills too. You log each shot, get a next-dose reminder, rotate injection sites, and watch your weight trend over time.

It is genuinely good at what it sets out to do. If you searched "shotsy app" to find out what it is before installing, here's the short version: it's a focused, free-first tracker for the medication side of a GLP-1 journey. It is not a coaching program, a food scanner, or a body scanner. Knowing that boundary is the whole point of this review, because the gap it leaves open is exactly the one that matters most if you care about the quality of your weight loss, not just the number on the scale.

What Shotsy does well (the honest part)

Credit where it's due. Shotsy earns its ratings.

The free core tier covers the essentials most people actually need: dose logging, dose reminders, side-effect notes, a weight trend, and basic nutrition logging. The interface is clean and fast, which matters for something you'll open every week for months. Its signature premium feature is the medication-level curve, an estimate of how much drug remains in your system between injections, which helps people visualize why they feel different on day two versus day six.

The third-party validation is real: 4.8 out of 5 from 29K ratings on the US App Store is not something you fake (App Store listing, checked 5 August 2026). We've deliberately left download counts out of this review: Apple doesn't publish them, the numbers quoted on comparison blogs disagree with each other, and none of them can be checked. The rating can be. For someone who just wants a reliable shot log and a weight chart, Shotsy is a legitimately strong pick, and this review isn't a hit piece. The critique that follows is about completeness, not competence.

Pricing: is Shotsy free, and what does Shotsy cost?

Shotsy is free to download, and the core logging features stay free. For the paid tier, here's what Apple's own listing shows — rather than what comparison blogs repeat about each other:

Source: Shotsy GLP-1 Tracker on the US App Store — in-app purchase list, checked 5 August 2026.

Two things are worth noticing. First, Apple lists several in-app purchase tiers, not one price: subscription apps commonly carry different tiers for different plans, promotions, grandfathered subscribers and regions. A tier list is a range you might be shown, not a quote. Second, the "$49.99/year" figure that circulates across Shotsy comparison articles does not appear anywhere in Apple's current in-app purchase list. Whatever it was at some earlier point, it isn't what Apple shows today. Check the live price in-app before you subscribe — the table above is a dated snapshot, not a guarantee.

For the record on freshness: this review was checked against Shotsy GLP-1 Tracker v3.3.7 (released 16 July 2026) by Shotsy Co., listed under Health & Fitness, free to download with in-app purchases.

And if you're weighing a subscription against your results rather than against other apps, the more useful frame is cost per pound of weight loss — next to what the medication itself costs, a tracker subscription is usually a rounding error, which is worth knowing before you optimise the wrong line item.

Should you pay for Shotsy Premium? (what you get, and what you can get free)

The headline paid feature is the medication-level curve — an estimate of how much drug is still on board between shots, which is what makes "why do I feel so different on day 2 versus day 6?" legible instead of mysterious. It's a genuinely good feature, and for a lot of people it's the entire reason a subscription is on the table.

If that curve is the whole reason, it's worth knowing you can plot the same idea free in a browser: a GLP-1 dose plotter draws your medication level across the week from your dose and schedule, with no account and no subscription.

Be fair about the trade, though. A web plotter is a one-off calculation; it isn't a substitute for Shotsy's logging history, its reminders, or having the curve sit on top of the doses you actually took over months. That continuity is the thing you'd be paying for, and it's a reasonable thing to pay for.

So, an honest decision rule: subscribe if you want the curve inside your own log. Don't subscribe just to find out what a decay curve looks like.

The one thing Shotsy can't tell you: fat vs. muscle

Here's the wedge, stated plainly: a weight graph cannot tell you whether the pounds you're dropping are fat or muscle. That's not a Shotsy failing specifically, it's a limitation of any tool that only tracks bodyweight. But it's the question that determines whether your results are the kind you want to keep.

This isn't hypothetical, and the numbers are published. The STEP 1 DXA sub-study of semaglutide found the weight lost split roughly 60% fat to 40% lean mass. The SURMOUNT-1 DXA sub-study of tirzepatide reported 74% fat to 26% lean. (The drug-by-drug version of that comparison, with the caveats each trial carries, is here: Zepbound vs Wegovy muscle loss.)

The honest reading is not "these drugs eat your muscle." SURMOUNT-1's placebo group — diet and exercise, no drug — lost 25% of its weight as lean mass, effectively the same split. Losing weight costs lean tissue whatever gets you there. The reason it matters more here is that GLP-1s make large, fast losses achievable for far more people, so the absolute amount of lean tissue in play is bigger.

Which is precisely the argument for measuring it. If a quarter to two-fifths of what you're losing is lean tissue, a scale that reports one number cannot tell you whether a good week and a bad week look any different.

Two things keep this honest. First, losing some lean mass is normal in any significant weight loss, GLP-1 or not, because your body sheds supporting tissue as it shrinks. Second, later work suggests the lean-mass decline is often front-loaded and can stabilize, and functional measures don't always drop in step with the scan numbers. So the takeaway isn't "GLP-1s destroy your muscle." It's more useful than that: muscle loss is a real, measurable variable, and Shotsy's weight graph is blind to it by design. You can't manage what you can't see.

Prove it's fat, not muscle. Watch your body-fat percentage and measurements over time with a phone 3D body scan + body-fat % in Tiro, not just the scale.

Why muscle loss is trackable, and what a tracker should measure

The good news is that the two biggest levers for protecting lean mass are both trackable, and they're not medical interventions, they're daily habits your prescriber will likely already endorse.

Lever one: protein. The International Society of Sports Nutrition (ISSN) position stand recommends 1.4 to 2.0 g of protein per kg of body weight per day for exercising individuals, and 20 to 40 g per serving to maximise muscle-protein synthesis. Clinical guidance for people in active weight loss more often sets a floor nearer 1.2 to 1.6 g/kg/day. Both are well above the general baseline of about 0.75 to 0.8 g/kg, and both work better spread across meals than banked into one. A GLP-1 protein calculator will turn your weight into a daily number in a few seconds — then ask your prescriber or a registered dietitian to sanity-check it against your situation.

Lever two: resistance training. Lifting or bodyweight work signals your body to hold onto muscle while you're in a calorie deficit. A tracker can't do your workouts, but it can help you protect the fuel that makes them count.

So what should a complete GLP-1 tracker actually measure? Three layers:

1. Protein against a personalized floor, not a calorie budget that quietly collapses when your appetite crashes on a higher dose.
2. Body composition — body-fat percentage, measurements, a 3D scan, and progress photos, so you can see fat-vs-muscle instead of guessing.
3. Dose-timed side effects, because if nausea wrecks your appetite on shot day, you'll miss your protein floor exactly when muscle is most at risk. Nausea is the most common GI side effect on GLP-1s and typically eases once you settle on a stable dose; titration is the main tolerability lever, per the FDA prescribing information for these drugs. Any change to your dose is a conversation for your prescriber, not an app.

Shotsy tracks none of these three the way they need to be tracked.

The Shotsy alternative that closes the gap: Tiro

Tiro is a GLP-1 companion and tracker built around the body-composition question Shotsy leaves open. To be clear about what it is and isn't: Tiro is a tracker, not a treatment. It doesn't change your clinical outcome, and it won't "prevent muscle loss." What it does is make protein and body composition visible, so you and your prescriber can watch the trend. Here's how each gap maps to a shipped feature.

• Protein-floor hero. Instead of a calorie target, Tiro sets a daily protein floor from your body weight and shows a running per-meal bar so you know, at a glance, whether you've hit it. Track your protein floor meal by meal, especially on the days appetite is low.
• 3D body scan + body-fat % + measurements + progress photos. This is the non-scale evidence layer. A phone 3D body scan + body-fat % trend lets you watch composition move, not just total weight, which is the only honest way to answer "is this fat or muscle?"
• Dose-timed symptom log with mitigation tips. Log a side effect against your actual dose day and titration step, and get an "is this normal?" read plus practical hydration and fiber nudges. Log this side effect and get mitigation tips rather than staring at an undifferentiated list.
• Real PK/titration math, injection-site rotation, and next-dose reminders. Tiro keeps the shot-logging strengths you'd expect, plus a proper pharmacokinetic curve and an injection-site rotation heatmap. Set titration + next-dose reminders so the medication side stays as tidy as it is in Shotsy.

Keep Shotsy for the shot log if you love it, add Tiro for the body-composition layer. See how Tiro works.

Other Shotsy alternatives, briefly

To keep this fair: Shotsy isn't your only option. MeAgain bundles food, side effects, and progress, and its strength-benchmark proxy is the closest any mainstream app gets to composition, but a strength benchmark still isn't a body-fat measurement. Regimen leans into symptom-and-outcome correlation. DoneDose and Pep cover dose logging and reminders competently. None of them measures body-fat percentage. If body composition is your priority, that's the line that separates them. For the wider field, here are the best GLP-1 tracker apps compared.

Who should stay on Shotsy

Switching isn't the right answer for everyone, and a review that never tells anyone to keep the incumbent is an advert wearing a review's clothes. Stay on Shotsy if:

• You already have a nutrition app you like. Shotsy's job is the medication side. If MyFitnessPal, Cronometer or similar already owns your food log, bolting on a second food tracker is friction, not insight.
• You want a single-purpose, private injection log. Fewer features means fewer prompts and less to ignore. That's a legitimate preference, not a compromise.
• You aren't tracking body composition and don't intend to. If the scale is the number you care about and you've made your peace with that, the gap this article is about isn't a gap for you.
• You've just paid for a year. Nothing here is urgent enough to write off a subscription over. The body-composition question will still be there at renewal.

Shotsy vs. Tiro: side-by-side

Scored on capability, not marketing. Shotsy wins on maturity and its rating history; Tiro wins on the body-composition and protein layers. On the medication basics — dose logging, reminders, injection site rotation tracking — the two are close, and that's the point: the difference isn't the shot log.

If all you need is a clean weight graph and a reliable shot log, Shotsy is excellent and free. If you want to see whether your loss is fat or muscle, that's a different tool.

UK note: Mounjaro-first

For UK readers, the dominant weight-loss brand is Mounjaro (tirzepatide), available both through the NHS under specific eligibility criteria and via private clinics such as Voy, Numan, and CheqUp. In the UK, Mounjaro covers both the diabetes and the weight-management indication — there is no UK Zepbound, so the US-style brand split doesn't apply here. The titration ladder and side-effect picture are broadly the same, and NICE guidance and the NHS are your reference points for eligibility and safety. Whichever brand you're on, the fat-vs-muscle question is identical, and so is the case for tracking protein and body composition — see Mounjaro vs Ozempic muscle loss in the UK for the UK-specific comparison. Always follow your prescriber's or GP's guidance on dosing.

The verdict

Shotsy is a genuinely good, genuinely free GLP-1 shot logger. If a clean weight graph and a solid dose log are all you need, keep it, there's no shame in a tool that does one job well.

But a weight graph can't answer the question that decides whether your results last: is this fat, or is it muscle? If protecting lean mass matters to you, you need a body-composition and protein-floor layer that Shotsy simply doesn't have. That's the gap Tiro was built to close, as a tracker that helps you and your prescriber watch the trend, never as a treatment that promises an outcome. And as always: talk to your prescriber before changing your medication, diet, or exercise.

FAQ

Is Shotsy worth it? Worth installing, yes — the free tier covers dose, side-effect, weight and nutrition logging, and it's rated 4.8 out of 5 from 29K ratings on the US App Store (checked 5 August 2026). Worth paying for only if you specifically want the medication-level curve tied to your own logging history; no tier tells you whether the weight you're losing is fat or muscle.

Is the Shotsy app free? Yes. Shotsy is free to download, and core dose, side-effect, weight and nutrition logging stays free. Apple's listing shows paid in-app purchase tiers of $9.99, $14.99 and $19.99 monthly and $39.99 and $59.99 yearly (App Store, checked 5 August 2026). Check the live price in-app before subscribing.

How much does Shotsy cost? Apple's App Store listing shows in-app purchase tiers of $9.99, $14.99 and $19.99 monthly and $39.99 and $59.99 yearly, checked 5 August 2026. The "$49.99/year" figure repeated across comparison blogs does not appear in Apple's current in-app purchase list. A tier list is a range, not a quote — confirm the live price in-app before you subscribe.

Does Shotsy track muscle loss or body fat? No. Shotsy charts total body weight, which can't separate fat from lean mass. To see body composition you need body-fat percentage, tape measurements, a 3D body scan, or a clinical scan such as DEXA.

What's the best Shotsy alternative for body composition? Tiro adds a protein floor, a phone 3D body scan, and a body-fat-percentage trend, so you can watch composition rather than just the scale. MeAgain and Regimen add symptom correlation and strength benchmarks. Choose based on whether you want body-composition evidence or charts alone.

How much protein should I eat on a GLP-1 to protect muscle? The ISSN position stand recommends 1.4 to 2.0 g/kg/day for exercising individuals, with 20 to 40 g per serving to maximise muscle-protein synthesis. Clinical weight-loss guidance more often uses a floor around 1.2 to 1.6 g/kg/day — either way, well above the general baseline of about 0.8 g/kg, and alongside resistance training. Ask your prescriber or dietitian for your personal target; a tracker helps you hit a daily floor.

Is Shotsy or MeAgain better? Shotsy is the more mature, chart-heavy free shot logger. MeAgain bundles food, side effects, progress, and a strength-benchmark proxy. Neither measures body-fat percentage, so pick based on the feature you'll actually use.

Sources

• Wilding JPH, et al. Impact of Semaglutide on Body Composition: Exploratory Analysis of the STEP 1 Study. Journal of the Endocrine Society. 2021;5(Suppl 1):A16–A17 — the DXA sub-study.
• Look M, et al. Body composition changes during tirzepatide treatment in participants with obesity. Diabetes, Obesity and Metabolism. 2025;27(5):2720–2729 — the SURMOUNT-1 DXA sub-study.
• Wilding JPH, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine. 2021;384(11):989–1002 — the STEP 1 trial.
• Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine. 2022;387(3):205–216 — the SURMOUNT-1 trial.
• Conte C, Hall KD, Klein S. Is Weight Loss–Induced Muscle Mass Loss Clinically Relevant? JAMA. 2024;332(1):9–10.
• Jäger R, et al. International Society of Sports Nutrition Position Stand: protein and exercise. Journal of the International Society of Sports Nutrition. 2017;14:20 — 1.4–2.0 g/kg/day for exercising individuals; 20–40 g per serving for muscle-protein synthesis.
• Shotsy GLP-1 Tracker on the US App Store — developer Shotsy Co.; rating, version and in-app purchase tiers checked 5 August 2026.
• Wegovy (semaglutide) US Prescribing Information — DailyMed, revised June 2026.
• Zepbound (tirzepatide) US Prescribing Information — DailyMed, revised 4/2026.

Related reading: best GLP-1 tracker apps compared · how much protein per meal to protect muscle on a GLP-1 · what changes when you step up your Ozempic dose

This article is for information only and is not medical advice — talk to your prescriber before changing your medication, diet, or exercise.