Most GLP-1 tracking apps do one thing: log your shots and remind you when to take them. That's useful. But if you're on retatrutide, tirzepatide, or a peptide stack — or you actually want to understand what's happening in your protocol, not just record it — you need something more. Here's the honest comparison of every major app in 2026.
Every app in this category can log an injection. Most can set a reminder. Several can chart your weight. But the gap between logging data and understanding data is enormous — and almost no app in this category bridges it.
GLP-1 and peptide users need to know: is my energy trend improving? Is my food noise consistent throughout the week or dropping off before my next injection? Is this a rough week because I escalated or because something else is happening? No reminder app answers those questions. They just store the numbers and leave the interpretation to you.
| App | Injection Logging | Weight + Macros | Symptom Tracking | AI Analysis | Peptide Support | Free |
|---|---|---|---|---|---|---|
| Shotsy | ✓ | ✓ | ✓ | — | — | Free tier |
| Glapp | ✓ | ✓ | ✓ | ✓ | — | Free |
| Pep | ✓ | ✓ | ✓ | — | — | Free tier |
| MeAgain | ✓ | ✓ | ✓ | — | — | Free tier |
| Peptide Companion | ✓ | ✓ | ✓ | ✓ Daily AI | ✓ Full | Paid |
Shotsy is the gold standard for injection logging clarity. The interface is genuinely clean — logging a dose takes one tap, the medication level chart (which visualizes drug concentration between doses) is consistently praised in reviews, and the weekly rhythm visualization helps users understand where they are in their cycle. If you want the most friction-free shot logger with the best UI, Shotsy wins.
Glapp stands out in the free tier for its AI Q&A feature — you can ask questions about GLP-1 therapy and get answers backed by research. The drug concentration visualization is good. It tracks side effects, food noise, and weight with solid UI design. For someone on Ozempic or Mounjaro who wants more than a reminder app but doesn't want to pay, Glapp is the strongest free option.
Both Pep and MeAgain position as all-in-one apps — combining injection tracking with macro logging, water, steps, and progress photos. If you want a single app that handles GLP-1 tracking AND your nutrition goals, either is a solid choice. Pep is slightly cleaner. MeAgain is more comprehensive. Neither has AI protocol analysis or peptide support beyond basic dose logging.
Peptide Companion was built from the ground up for GLP-1 and peptide users who want interpretation, not just storage. The core feature — Companion Intelligence — is an AI monitoring layer that analyzes your daily signals (energy, nausea, food noise, fatigue, appetite) and generates personal observations about what's actually happening in your protocol. Not generic tips. Observations about your data, your patterns, your trajectory.
It's the only app that supports the full peptide ecosystem — retatrutide, BPC-157, CJC-1295, ipamorelin, TB-500 — with protocol-specific intelligence rather than just a generic dose log. The 14-day signal heatmap shows exactly when your symptoms cluster across your injection cycle. The Doctor Report generates a clinical summary ready to share with your prescriber.
Do you want to log your protocol or understand your protocol? Every app in this list logs. Only Peptide Companion and Glapp attempt interpretation. If you're serious about understanding what's happening in your body — especially on retatrutide or a peptide stack — that distinction matters.
You want the cleanest, simplest injection tracker. You don't need AI or protocol analysis. You primarily want dose reminders and the medication level chart.
You want the best free option with some AI capability. You're on semaglutide or tirzepatide and want a full-featured tracker without paying.
You want one app that handles injections AND macros AND progress photos in a single interface. You're more focused on overall health tracking than protocol-specific intelligence.
You want to understand what's actually happening in your protocol — not just log it. You're on retatrutide, BPC-157, or any peptide outside the standard GLP-1 list. You want daily AI observations about your personal pattern. You want a Doctor Report to share with your prescriber. You're serious about your protocol and want the most intelligent tracking available.
The only GLP-1 and peptide tracking app with daily AI observations, a 14-day signal heatmap, Doctor Reports, and full peptide protocol support. Built for people who want to understand their protocol — not just log it.
Get the App →The best GLP-1 tracking app depends on what you need. For injection reminders and dose logging, Shotsy is the cleanest option. For comprehensive tracking including macros and weight, MeAgain or Pep are strong. For AI-powered protocol interpretation and users on retatrutide or peptides like BPC-157, Peptide Companion is the only app built specifically for that use case.
Yes. Peptide Companion is the only major GLP-1 tracking app built specifically for retatrutide and other peptide protocols including BPC-157, CJC-1295, and ipamorelin — not just semaglutide and tirzepatide. Most other GLP-1 apps support retatrutide as a dose log but lack protocol-specific intelligence for it.
Yes. All major GLP-1 tracking apps — Shotsy, Glapp, Pep, MeAgain, and Peptide Companion — support Ozempic and Wegovy (semaglutide). They differ in what they do beyond dose logging: reminders, weight tracking, macro logging, AI analysis, and protocol interpretation vary significantly between apps.
A good GLP-1 tracking app should do more than log your injections. The most useful apps track your full protocol response — energy, nausea, appetite, food noise, fatigue — alongside doses and weight, then surface patterns that help you and your prescriber understand how your protocol is working. The best apps turn raw data into interpretation, not just storage.
Several GLP-1 tracking apps have free tiers — Glapp is fully free, Shotsy has a free tier, Pep and MeAgain have free options with paid upgrades. Peptide Companion is a paid subscription with no permanent free tier, reflecting its focus on premium AI-powered protocol analysis.