Comparison

Trajectory vs Pepzio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Trajectory

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Trajectory focuses on long-term direction instead of daily noise, so you can stay consistent without overreacting. TRACK YOUR WEIGHT EFFORTLESSLY • Log your weight in seconds • Supports kg and lbs • Full history STAY ON COURSE • Set a target weight and deadline • See your personal trajectory line • Know exactly where you should be today UNDERSTAND YOUR BODY • BMI tracking with instant feedback • 7-day trend to spot momentum • Progress toward your goal CLEAN & FOCUSED • No subscriptions. Free. • Beautiful chart that tells the whole story Trajectory doesn't judge. It doesn't nag. It just shows you the path, and whether you're on it.

About

Pepzio

Features
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Pepzio is the most precise peptide and hormone protocol tracker built for serious users. Log every dose, track vial levels, and never miss a reconstitution. The protocol calendar shows your full schedule at a glance, with smart alerts when vials expire or run low. KEY FEATURES • Protocol Calendar — daily dose schedule with completion tracking • Vial Tracker — monitor fill levels, expiry, and reconstitution dates • Dose Logger — log injections in seconds with site rotation tracking • Reconstitution Calculator — reconstitute any peptide with exact BAC water ratios; supports any syringe size • Lab Results — store and compare bloodwork over time • HealthKit Integration — syncs weight, sleep, and workout data to connect training load to your protocol • AI Daily Coach — personalized insights based on your protocol and activity WORKS FOR BPC-157, TB-500, CJC-1295, Ipamorelin, HGH, Semaglutide, Tirzepatide, Testosterone, TRT, and any custom compound. PRIVACY FIRST Your data stays on your device. Cloud sync is optional and fully encrypted. Not intended as medical advice. Always consult a qualified healthcare provider before starting any peptide or hormone protocol. Terms of Use: https://pepzioapp.com/terms Privacy Policy: https://pepzioapp.com/privacy

Screenshots

Pepzio4 screens

Verdict

The call

Trajectory and Pepzio are too close to call on the numbers: across 3 compared parameters — price, in-app purchases and iOS requirement among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Trajectory versus Pepzio: the parameters behind the verdict, then further details
ParameterTrajectoryPepzio
PriceFreeFree
Ads—Yes
In-app purchasesNoNo
Devices—iPhone — better
Requires iOS18.517.0 — better
Further details — not scored
Size2 MB24 MB
Age rating17+12+
DeveloperMathieu BonteAlfredo Guida

In-app purchases

None

Trajectory

No in-app purchases

None

Pepzio

No in-app purchases

Questions

Is Trajectory free?
Trajectory is free to download, with no in-app purchases.
Is Pepzio free?
Pepzio is free to download, with no in-app purchases.

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