Regimen vs Pep: Dose Ledger vs GLP-1 Wellness App

Two Different GLP-1 Tracking Philosophies

Pep and Regimen are both aimed at GLP-1 users but built around different core questions.

Pep's question is: how am I doing overall? Their app combines injection logging with nutrition tracking, macro counting, weight logging, and water intake — a complete wellness picture of the GLP-1 experience.

Regimen's question is: did I take my dose exactly as prescribed, and can I prove it? The app is a dose ledger with an immutable history, cycling-aware scheduling, and PDF doctor sharing. It is not a wellness app.

Neither is universally better. They reflect different priorities for the same user group.

What Pep Does Well

Pep is purpose-built for the GLP-1 weight loss use case. Their site explicitly covers Ozempic, Wegovy, Zepbound, Mounjaro, Rybelsus (oral), and compounded GLP-1 medications — every commercially significant GLP-1 medication.

The nutrition and macro tracking integration is Pep's strongest differentiator. GLP-1 medications significantly affect appetite and food tolerance. Having your injections and your food diary in the same app — so you can correlate dose day with how much you ate, or track protein intake during a titration — is a genuinely useful combination that no other app in this survey offers alongside injection logging.

Weight tracking and body measurements are also built in, which gives users a longitudinal view of their GLP-1 progress without exporting to a separate health app.

Water intake logging matters for GLP-1 users experiencing nausea or food aversion, since hydration management is commonly emphasized by prescribers.

Pep supports 10 languages, giving it the widest international reach in this category. They also explicitly disclaim data sharing with advertisers, which is a transparent privacy posture for a health app.

Where Regimen Is Different

Dose ledger as the primary artifact. Every dose log in Regimen is append-only: corrections create void events rather than deleting records. The full history is preserved. This is important for users whose providers want to review their dose adherence — a PDF sharing of your actual log is more defensible than a summary chart.

Cycling and titration schedule. GLP-1 titrations follow structured dose escalation — starting at a lower dose for 4 weeks, moving to the next level, and so on. Regimen's cycling system can model these schedule changes. The app's dose calendar reflects exactly which day you're on in the titration protocol. Pep does not advertise cycling or titration schedule support on their public site.

Injection site rotation with body diagram. GLP-1 users are instructed to rotate injection sites between abdomen, thigh, and upper arm. Regimen's body diagram lets you tap the exact site for each injection, and the app tracks rotation history. Pep does not mention injection site rotation.

AI care-plan scanning. If your GLP-1 prescriber provides a printed protocol sheet, Regimen can read a photo of it and extract the compound, dose, and schedule automatically. Vial label scanning works on compounded GLP-1 vial labels as well. Pep does not have AI scanning.

PDF report sharing. Regimen generates a filterable PDF of your dose history for provider visits. This is useful for follow-up appointments where your prescriber wants to review adherence. Pep does not advertise a PDF sharing feature.

Vial supply tracking. Log an open GLP-1 vial or pen and Regimen counts down the doses it holds, projects the date it will run out from your weekly schedule, and raises a Low Supply alert a configurable number of days ahead. For compounded GLP-1 users who reorder from a pharmacy, the alert lands in time to place the order before the current vial is empty. Pep does not advertise vial supply tracking.

Peptide support alongside GLP-1. Many users on GLP-1 protocols are also tracking peptides — BPC-157, TB-500, or growth hormone peptides alongside Semaglutide or Tirzepatide. Regimen handles all of these in the same protocol framework. Pep is GLP-1-only.

Where Pep Has the Advantage

Nutrition and macro tracking is a real advantage for users who want to manage food intake as part of their GLP-1 journey. This is the core use case Pep is built for, and Regimen does not compete here. If you want your injection log and your macro counter in the same app, Pep.

Weight and body measurement tracking is built in, which is useful for seeing the GLP-1 results without exporting data.

Water intake logging is a small but practical feature for the GLP-1 experience.

Android support. Regimen is iOS-only. Pep is available on both iOS and Android.

International reach: 10 languages vs Regimen's English-only app.

Who Should Use Which

Choose Pep if: You want to track nutrition, macros, and water intake alongside your GLP-1 injections, you want to log weight and body measurements in the same app, or you need Android support.

Choose Regimen if: You want a clinical-grade dose ledger with soft-void undo and audit trail, you need injection site rotation with a body diagram, you're on a structured titration schedule with cycling, you receive protocols from a provider and want AI to extract them from a photo, you also track non-GLP-1 compounds like peptides or hormones, or you need a formatted PDF to share with your prescriber.