Cronometer tracks 82 nutrients. MeAgain tracks what matters on GLP-1 — protein for muscle preservation, fiber for digestion, water for hydration, plus your injections, side effects, and medication levels. Built for the medication experience, not general nutrition science.

Last updated March 2026
Cronometer is the gold standard for micronutrient tracking — 82 nutrients, lab result tracking, and custom targets for nutrition researchers and serious health optimizers. MeAgain is built for GLP-1 medication users who need injection scheduling, medication levels, and side effect logging alongside their food tracking. Cronometer has depth MeAgain doesn't offer. MeAgain has GLP-1 tools Cronometer wasn't built for.



| Feature | MeAgain | Cronometer |
|---|---|---|
| Shot day checklist with prep steps | ||
| Injection tracking and site rotation | ||
| Estimated medication levels chart | ||
| Capybara home screen widget | ||
| Side effect tracking with severity slider | ||
| AI chat companion (Capy) | ||
| Zero markup GLP-1 medications | ||
| GLP-1-specific nutrition targets (protein/fiber/water) | ||
| Detailed nutrition tracking | ||
| Barcode scanning | ||
| HealthKit sync | ||
| Weight tracking | ||
| 82 micronutrient tracking | ||
| Custom nutrient targets | ||
| Lab result tracking | ||
| API integrations |
When appetite suppression changes how you eat, the most important daily targets become protein (to preserve muscle during weight loss), fiber (to reduce GI side effects like constipation and bloating), and water (to manage the dehydration risk that semaglutide and tirzepatide can cause). MeAgain puts these three targets front and center — not buried in an 82-nutrient breakdown.

MeAgain's shot day checklist walks you through prep steps on injection day. The injection site rotation map records where you injected last and suggests where to go next. The estimated medication levels chart visualizes your pharmacokinetic curve across the week so you can understand how your drug concentration changes between doses. These are core MeAgain features — Cronometer has none of them.

MeAgain tracks 6 default GLP-1 symptoms — nausea, fatigue, constipation, heartburn, food noise, suppressed appetite — with an expandable list and a severity slider (0–10) per symptom. You can add custom symptoms specific to your experience. This gives you a structured log correlated to your dose timeline — not just a notes field.

The Capybara home screen widget puts your daily protein, fiber, water, and steps progress on your iPhone home screen — updated in real time with 9 mood states based on how you're doing relative to your goals. Widget users have half the churn rate of non-widget users. Streaks and Journey Cards add milestones to the daily tracking routine.

Cronometer's depth is genuinely impressive — tracking 82 micronutrients, integrating lab results, and offering custom nutrient targets that nutrition professionals and biohackers rely on. For general health optimization, that depth has real value. For GLP-1 medication users, the priority hierarchy is different. The most common challenges on semaglutide or tirzepatide aren't micronutrient gaps — they're hitting enough protein when you're not hungry, managing GI side effects, and understanding your medication schedule.
| Priority on GLP-1 | Cronometer | MeAgain |
|---|---|---|
| Protein (muscle preservation during weight loss) | Tracked among 82 nutrients | Primary daily target with quick-add on home screen |
| Fiber (GI side effect management) | Tracked among 82 nutrients | Daily target alongside protein and water |
| Water (dehydration risk) | Optional tracking | Daily target in Capybara widget and home screen |
| Injection scheduling | Not available | Shot day checklist, site rotation, push reminders |
| Medication levels | Not available | 7-day pharmacokinetic curve chart |
| Side effect logging | Not available | Severity slider, custom symptoms, dose-correlated timeline |
| Micronutrients (vitamin D, B12, magnesium, etc.) | 82 nutrients tracked in depth | Not available |
Cronometer's micronutrient depth is genuinely useful — especially for GLP-1 users who want to monitor nutrients like B12, vitamin D, or iron that can shift during rapid weight loss. Some subscribers use both apps: Cronometer for nutrition analysis, MeAgain for the GLP-1-specific tools and daily tracking experience.
This content is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider about your GLP-1 medication and nutritional needs.
Cronometer users who start GLP-1 often find that their micronutrient tracker doesn't address the core challenges of the medication experience — injection scheduling, side effect management, and medication level awareness. MeAgain fills that gap with purpose-built GLP-1 tools.
MeAgain is the all-in-one GLP-1 care partner — built for the daily experience of being on medication, with the shot day checklist, medication levels chart, and zero markup meds that a micronutrient tracker was never designed to provide.

MeAgain is purpose-built for GLP-1 medication users, while Cronometer is designed for deep micronutrient tracking. MeAgain adds injection tracking, a shot day checklist, estimated medication levels, and side effect logging that Cronometer doesn't have. Both apps offer detailed nutrition tracking, barcode scanning, HealthKit sync, and weight tracking.

Track the plan, dose, meals, and milestones in one place that actually keeps up with your day.