Now available on iOS

What's Your Stack?

Open the case. Every vial is a piece of the app — hover one to see it in action.

STACK
8 vials inside

Hover a vial to see what it does

    Download on the App Store See what's inside
    600+
    Compounds
    Apple Health
    Synced
    18+
    Adults only
    Built different
    On-device encryption
    Pharmacokinetic-grade
    HIPAA-aware design
    No ads. Ever.
    Features

    Everything you need to run your protocol.

    From the first reconstitution to lifelong analytics — Stack is built for the protocol-obsessed.

    Smart Reconstitution

    Input your peptide mg, BAC water, and dose — Stack calculates concentration, draw volume, and units to the line on your syringe.

    Stack Scheduling

    Build complex stacks with custom cycles — 5-on / 2-off, taper schedules, or anything in between. Stack tracks every dose.

    Day Streaks

    Stay consistent. Stack rewards compliance with streaks, completion badges, and a live calendar of logged, partial, and missed days.

    Body Analytics

    Track weight trends, body measurements, and progress photos. See how your stack moves the metrics that matter.

    Nutrition & Macros

    Scan meals, log macros, track water. Pair protein-first nutrition with your peptide protocol for results that compound.

    Privacy By Design

    All data lives on your device. AES-256 encrypted. No ads, no tracking, no selling your data. Your protocol stays yours.

    Your case

    Every protocol, at a glance.

    Your home screen is a case of vials. See what's due, tap any vial to chart its active levels, and log a dose in seconds — without digging through menus.

    • Live calendar with logged, partial, and missed days
    • Morning, midday, and evening dose groups
    • Day streak counter to keep you on protocol
    Stack home screen with a case of vials and a monthly dose calendar
    Injection site rotation

    Never hit the same spot twice.

    An interactive body map tracks every site you've used and how long it's been resting — then suggests where to go next. Front and back, fully mapped.

    • Unused, ready, and resting states per site
    • One-tap "suggest next site"
    • Full history of your last shots
    Body screen with an interactive anatomical map for injection site rotation
    Metrics & Apple Health

    Peptides don't work in a vacuum.

    Weight, HRV, resting heart rate, sleep, body fat, VO₂ max — Stack pulls it straight from Apple Health and lines it up against your protocol so you can see what's actually moving.

    • 12+ health metrics synced automatically
    • Mood and side-effect check-ins alongside doses
    • Progress photos with side-by-side compare
    Metrics screen showing weight, resting heart rate, HRV, and Apple Health data
    Pricing

    Simple pricing.
    Everything included.

    Try Stack risk-free. Cancel anytime. No hidden fees, no upsells, no asterisks.

    Weekly
    $ 9.99 / week
    Flexible billing. Ideal for shorter cycles or to try Stack out.
    Equivalent annual cost $519.48 / year
    Start weekly
    Save $469
    Yearly
    $ 49.99 / year
    Best value. Just $0.96 / week — billed annually.
    vs. paying weekly Save 90% — $469/yr
    Start yearly
    Every plan includes
    • Unlimited stacks & peptides
    • Full reconstitution calculator
    • Nutrition, hydration & body tracking
    • Home screen widgets
    • AES-256 encryption, on-device
    • Cancel anytime

    Both plans auto-renew. Cancel anytime from your Apple ID subscription settings.

    iOS — iPhone & iPad

    Your protocol deserves better tooling.

    Download Stack and dial in your transformation today.

    Download on the App Store