Best GLP-1 Tracking Apps in 2026, Compared

The best GLP-1 tracking app in 2026 depends on what you are optimizing for: dose logging and side effects, multi-compound calculators, community, body composition, or muscle preservation. Almost every serious app handles the basics (logging your shot, rotating injection sites, noting side effects, tracking weight) well, so the real differences show up in the specialized features. For muscle preservation specifically, you want body composition, protein, and resistance training connected, which narrows the field.

This roundup compares five of the strongest options (Pep AI, Regimen, Shotsy, Phaze, and Myo), gives each an honest "best for" verdict, and is clear about where each one stops. Features and pricing change often, so confirm the details on each app's current App Store or Google Play listing before you decide.

How we compared these apps

We scored each app on the dimensions GLP-1 users actually weigh: dose logging, side-effect tracking, pharmacokinetic (PK) modeling (the estimated drug-level curve across your dosing week), dose and reconstitution calculators, protein and nutrition tracking, body composition (fat vs lean mass), resistance-training logging, platforms (iOS and Android), free tier, and price.

We used public App Store, Google Play, and official-site information as of 2026. Where a capability is not documented publicly, we mark it "not confirmed" rather than assuming it is missing, because these apps ship updates constantly. Treat the table as a snapshot, not a permanent ruling. Define-as-you-go: "compound" here means a tracked substance (a GLP-1 or peptide), and "PK curve" means the rise-and-fall of estimated drug levels over time.

The comparison table

Read across rows, not down columns. Each of these apps is genuinely good at its core job; the table shows where their strengths and gaps fall for a GLP-1 user.

Feature	Myo	Pep AI	Regimen	Shotsy	Phaze
Dose logging	✓ Sites, dates, missed-dose marker	✓ Body map, site tracking	✓ Site rotation, multi-compound	✓ Broad med list, polished	✓ 14+ medications
Side-effect tracking	✓ With correlation charts (Premium)	✓ 15+ symptoms with severity	✓ "Signals" correlation engine	✓ Side-effect logging	✓ Symptom logging
PK / estimated levels	✓ Med-level curve + "Your Body's Curve"	✓ PK/compound estimator	✓ PK visualizer, 40+ compounds	✓ Estimated GLP-1 level (Premium)	✓ PK estimated levels
Dose / reconstitution calculators	limited: titration/microdose planner	✓ Reconstitution "Peptide Calculator"	✓ 6 calculators (best suite)	limited: not a calculator focus	limited: not a calculator focus
Protein / nutrition	✓ Target + coaching, food DB, barcode/photo/voice	✓ Macros + AI meal-photo scanner	limited: syncs weight/body-fat, not native macro logging	✓ Calories, protein, water	✓ Protein-first, AI photo/barcode/voice
Body composition (fat vs lean)	✓ Fat-vs-muscle + muscle-loss trend flag; DEXA/InBody/scale sync	✗ Not listed	limited: syncs body-fat % from Health, no native fat-vs-muscle analysis	limited: logs body-fat and lean-mass numbers	✓ AI body-comp (beta) + DEXA import + lean-mass trending
Resistance-training logging	✓ In-app	✗ Not listed	not confirmed	✗ Not listed	✗ Not listed
Platforms	iOS	iOS + Android	iOS + Android	iOS + Android	iOS (Android listed, verify)
Free tier	✓ Free for 1 medication	✓ Free app + Premium	✓ Free for 1 compound (all features)	✓ Free tier (limited)	✓ Free tier (limited)
Price (as of 2026)	$6.99/mo, $39.99/yr, $99.99 lifetime	~$9.99/mo, ~$24.99-44.99/yr	$4.99/mo, $39.99/yr	~$9.99-19.99/mo, ~$39.99-59.99/yr	$4.99/mo, $34.99/yr

Cells marked "not confirmed" or "not listed" reflect what is publicly documented as of 2026, not a claim the feature is impossible. Verify each app's current listing.

Pep AI: best broad all-in-one peptide tracker

Pep AI (by Zode Development LLC) is a strong, broad all-in-one for people tracking GLP-1s alongside other peptides, and it is well rated for good reason (around 4.7 stars from 1,400-plus ratings as of 2026). It runs on both iOS and Android, includes an interactive injection-site body map, lets you log 15-plus side-effect symptoms with severity, tracks nutrition and macros with an AI meal-photo scanner, offers a PK and compound-level estimator, includes a reconstitution "Peptide Calculator," syncs with Apple Health, ships Apple Watch support, and provides a 75-plus compound research library plus PDF export. If you want one capable app that spans peptides and GLP-1s with a modern AI nutrition workflow, Pep AI is a genuinely good choice.

Where it differs from a muscle-first tool is body composition and training. As of 2026, fat-vs-muscle body-composition analysis and resistance-training logging are not listed in Pep AI's public feature set. So Pep AI will track your doses, symptoms, and macros well, but it does not separate fat mass from lean mass or log your lifts, which are the two streams that matter most for keeping muscle. Best for: peptide-and-GLP-1 users who want broad all-in-one coverage with Apple Watch.

Regimen: best multi-compound calculators and protocol tracking

Regimen (by Awaken Labs LLC) is the power user's protocol tracker, and on calculators and PK it is the best in this group. Credit where due: it ships six calculators (reconstitution, reverse BAC, TRT oil, GLP-1, intranasal, and split-dose), a PK half-life visualizer covering 40-plus compounds, injection-site rotation, lab and bloodwork logging across 50-plus markers, progress photos, CSV import and export, and a "Signals" correlation engine, on both iOS and Android with Apple Health and Google Health Connect sync. It is free for one compound with all features, then $4.99 per month or $39.99 per year. If you run a stack, dial in doses with precision, or want serious calculators and PK curves on Android, Regimen is hard to beat, and it would be wrong to suggest otherwise.

On the muscle side, Regimen syncs body-fat percentage from your Health integrations, but it does not offer a native fat-vs-muscle analysis, and resistance-training logging is not confirmed in its public feature set as of 2026. So Regimen can pull in a body-fat number, but it does not interpret lean mass as a muscle-preservation signal or log the training that defends it. Best for: multi-compound and stack users who want the deepest calculators and PK tooling, especially on Android.

Shotsy: best community and mainstream experience

Shotsy (by Aja Beckett) is the mainstream favorite, with the largest GLP-1 community in this lineup (over a million downloads and a 4.9 rating as of 2026) and a notably polished, focused experience on iOS and Android. It covers a wide medication list (Ozempic, Wegovy, Mounjaro, Zepbound, Rybelsus, Saxenda, Trulicity, plus compounded and custom), handles dose logging, side effects, weight, and injection-site rotation, and adds estimated GLP-1 level charts and nutrition tracking (calories, protein, water) on premium. If you want a beautiful, well-supported shot tracker with a big, active community to lean on, Shotsy is an easy recommendation.

To be fair to Shotsy, it recently added the ability to log body fat, lean body mass, waist circumference, and blood glucose, so it is no longer accurate to say it ignores body composition. The honest distinction is between logging a number and analyzing it: Shotsy lets you record a lean-mass figure, but a documented engine that flags a muscle-loss trend, correlates lean mass with protein and training, or imports a DEXA or InBody scan is not part of its public feature set as of 2026, and resistance-training logging is not listed. Best for: anyone who wants the most popular, polished mainstream GLP-1 tracker. Check its current listing, since it has been adding features quickly.

Phaze: closest peer on body composition

Phaze (by Zeit Capital) is the closest competitor to a muscle-aware approach, and on body composition it is excellent. It markets itself as a complete GLP-1 tracker spanning 14-plus medications, and its standout is a body-composition feature (in beta) that combines an AI photo estimate of body-fat and muscle (stated accuracy around plus or minus 3 to 5 percentage points) with DEXA scan import and lean-mass trending. It also offers PK estimated levels, protein-first nutrition logging with AI photo, barcode, and voice input, lab tracking across eight categories, progress photos, and a shareable clinical PDF, on a free tier plus Pro at $4.99 per month or $34.99 per year. If importing your DEXA and trending lean mass is the feature you care about most, Phaze is a serious, capable pick.

The gap, honestly stated, is resistance-training logging, which is not listed in Phaze's public feature set as of 2026. Resistance training is the strongest lever for preserving muscle in a deficit, so Phaze can measure and trend your body composition (and even ground it in a DEXA) without logging the workouts meant to protect it. Best for: users who want the deepest body-composition import and trending and already track their training elsewhere.

Myo: the muscle-first option

Myo (by PixelPort LLC) covers the GLP-1 basics (dose logging with sites, dates, and a missed-dose marker, side-effect tracking, weight, daily check-ins, PK curves with a personal "Your Body's Curve," a titration and microdose planner, and a supply and vial tracker for compounded users), so on the table-stakes it stands with the rest. We cover the dose-tracking fundamentals it shares with these apps in how to track your GLP-1 injections and the side-effect logging in tracking GLP-1 side effects.

Its differentiator is that it organizes around muscle. The reason this matters: research suggests roughly 25% to 40% of the weight lost on GLP-1 medications like Ozempic/Wegovy (semaglutide) and Mounjaro/Zepbound (tirzepatide) can come from lean mass rather than fat, and the scale cannot tell the two apart. Myo connects the three data streams that can: a fat-vs-muscle body-composition split (syncing a smart scale, DEXA, or InBody) with a muscle-loss trend flag, a calculated protein target with daily coaching, and in-app resistance-training logging, all next to your dose log. That integration (body comp plus protein plus training, interpreted together) is the combination none of the other four currently bundles. We go deeper on it in body composition tracking on a GLP-1, and compare the muscle-side feature sets head to head in the best apps to track GLP-1 and muscle loss.

The honest limitations: Myo is iOS only as of 2026, so Android users should look at Regimen, Shotsy, or Pep AI. On price, the free tier covers one medication with dose logging, an injection-site map, weight, side effects, daily check-ins, manual protein, fiber, and water rings, Apple Health sync (never paywalled), and data export. Premium ($6.99/mo, $39.99/yr with a 7-day trial, or $99.99 lifetime) adds multi-medication, the full PK curves, the fat-vs-muscle tracking and muscle-loss trend flag, doctor-ready PDF and CSV reports, side-effect correlation charts, the supply and vial tracker, a food database with barcode and photo and voice logging, the resistance-training logging and protein coaching, the titration and microdose planner, widgets, and iCloud sync. Myo is a tracking and education tool, not medical advice, and it is not affiliated with any GLP-1 maker. Best for: GLP-1 users on iOS who want to keep muscle, not just lose weight.

How to choose the right GLP-1 app for you

Pick by your top priority, because every app here is good at something:

• You run a stack or want the best calculators and PK, and maybe need Android: Regimen.
• You want a broad all-in-one peptide and GLP-1 app with Apple Watch: Pep AI.
• You want the most popular, polished mainstream shot tracker with a big community: Shotsy.
• You want the deepest body-composition import and trending (DEXA, AI estimate): Phaze.
• You want to keep muscle, with body comp, protein, and resistance training integrated, and you are on iOS: Myo.

Two rules outrank the app choice. First, check the free tier's exact limits (how many medications or compounds, which calculators, which AI features) before paying, because they differ a lot. Second, whatever you pick, use it consistently: a tracker only earns its keep when you open it every week and watch the trend rather than chasing a single number. The right app is the one that fits how you actually manage your treatment.

References

Pep AI features and pricing: pepaiapp.com and App Store/Google Play listings, as of 2026 (injection-site map, 15+ side-effect symptoms, AI meal-photo scanner, PK estimator, reconstitution calculator, Apple Watch, 75+ compound library; ~4.7 rating from 1,400+ ratings).

Regimen features and pricing: helloregimen.com and App Store/Google Play listings, as of 2026 (6 calculators, PK visualizer for 40+ compounds, lab logging, "Signals" correlation engine, Apple Health and Google Health Connect; free for 1 compound, $4.99/mo or $39.99/yr).

Shotsy features and pricing: shotsyapp.com and App Store/Google Play listings, as of 2026 (broad medication list, estimated GLP-1 level charts, nutrition, and recently added body-fat, lean-body-mass, and waist logging; 4.9 rating, 1M-plus downloads).

Phaze features and pricing: phaze.fit official site and App Store listing, as of 2026 (body-composition beta with AI estimate and DEXA import, PK levels, protein-first nutrition, labs, clinical PDF; Pro $4.99/mo or $34.99/yr).

Myo features and pricing: Myo by PixelPort LLC, App Store listing, as of 2026.

Lean-mass share of GLP-1 weight loss (range across trials): STEP 1 DXA analysis (semaglutide), Journal of the Endocrine Society, 2021; SURMOUNT-1 DXA substudy (tirzepatide), Diabetes, Obesity and Metabolism, 2025, doi 10.1111/dom.16275.

App features and pricing change frequently; confirm the current App Store or Google Play listing for each app before deciding.