Titrate vs Peptify: the closest functional twins, compared.

When Peptify is the right choice

If you fit this user, install Peptify.

• You're a serious researcher or biohacker who lives in bloodwork analysis and wants 80+ biomarker OCR import.
• You want the largest academically rigorous compound library (61 PubMed-cited) and don't mind that food/nutrition tracking isn't in the app.
• You'll use a single device (no cross-device sync needed) and you don't use Apple Health, Apple Watch, or iPad as part of your protocol.
• The $89.99 lifetime tier appeals more than recurring subscription.
• Two-compartment PK modeling matters more than anchoring symptoms to the curve geometrically.

Common questions

Peptify vs Titrate, answered.

Is Peptify or Titrate more rigorous on pharmacokinetics?

Peptify's two-compartment PK engine is the more sophisticated math layer in isolation. Titrate's plasma-decay chart uses published FDA pharmacokinetics from each compound's label and the key NEJM/Lancet trials. The practical difference: Peptify's curve is a smoother model; Titrate's curve is anchored to the same source documents the prescriber used. Titrate's wedge is that it then geometrically anchors logged side-effects to where they happened on the curve — Peptify charts symptoms separately.

Does Peptify work with Apple Health?

No. Peptify has no HealthKit integration as of v2.1.1. If you log body composition, dietary energy, water, or glucose in Apple Health (directly or via another app), Peptify can't read it and can't write back. Titrate ships bidirectional HealthKit for body mass, body comp, dietary energy, protein, carbs, fat, water, and glucose.

Does Peptify have an Apple Watch app?

No. Titrate ships an Apple Watch target for log-from-wrist workflows.

Does Peptify have AI features?

Limited — body composition estimates from photos. No LLM-powered weekly summary, no AI chat, no pattern detection. Titrate runs a weekly AI summary on-device via Apple Foundation Models (iOS 26+) and on-device pattern detection (plateau, adherence drift, side-effect spike, vial expiry, site rotation, steady-state).

Is Peptify's $89.99 lifetime worth it vs Titrate's yearly?

On price alone, yes — break-even is under 2 years. But the comparison isn't just price. If you need HealthKit write-back, Apple Watch, food photo scan, AI summaries, or cross-device CloudKit sync, you're paying $89.99 for a tool that doesn't ship those features. Pick by feature fit first, price second.

Does Peptify sync across devices?

No — Peptify is local-only as of v2.1.1, so your data lives on the single device you installed it on. If you lose the device, you lose the data. Titrate uses a private CloudKit container that's end-to-end encrypted and syncs across all your Apple devices automatically.

Which app has more compounds?

Peptify lists 61 PubMed-cited compounds; Titrate lists 26+ (every FDA-approved GLP-1 plus the core research-peptide stack). If browsing a large catalog of obscure peptides matters, Peptify wins on that axis. If you protocol the FDA GLP-1s plus BPC-157/TB-500/ipamorelin/CJC-1295/GHK-Cu/MOTS-c/NAD+, Titrate covers what you actually inject.

Should I switch from Peptify to Titrate?

Switch if you want HealthKit write-back, Apple Watch, AI weekly summaries, food photo scan, cross-device sync, CSV/JSON export, or side-effects anchored to your plasma-decay curve. Stay on Peptify if you live in bloodwork analysis, want the most academically rigorous compound library, and the $89.99 lifetime tier locks in the math layer for you.