Free on the App Store

Peptide reconstitution,
made clear.

The math-free way to dose peptides. Pick your vial, set your dose, see the exact units to draw — with a visual syringe so you don't have to squint at tick marks.

Download on theApp Store iPhone & iPad · Free to download

100% on-device · No accounts · No tracking · Validated against 240+ research-community sources

Peptly Calculator — reconstitution made clear

12+

Peptide profiles loaded

240+

Research sources validated

100%

On-device · No tracking

Languages supported

Everything you need

Built for serious peptide users

Reconstitution, logging, reminders, and exports — without the AI fluff or the cloud-account requirement.

Math-free reconstitution

Vial size, BAC water, target dose → exact units to draw. Three taps from setup to dose.

Visual syringe

See your draw before you pull it. No more squinting at tick marks while you do mental math.

12+ peptide profiles

BPC-157, TB-500, Ipamorelin, CJC-1295, Semaglutide, Tirzepatide, Retatrutide, GHK-Cu, Tesamorelin, MOTS-c, NAD+, AOD-9604.

Injection log

Every shot, site, and cycle stored on-device. Never forget what you took, when, or where.

Smart reminders

Schedule-aware notifications with site-rotation prompts so you actually rotate.

Save & reload protocols

Reload any mix in one tap. No re-entering vial size, water, dose every time.

CSV export

Your records, your control. Export the full log anytime.

100% on-device

No accounts, no servers, no third-party tracking. Your log never leaves your phone.

Download on theApp Store Free download · Works on iPhone & iPad

From setup to first dose in minutes

Three taps, exact dose.

Pick your peptide

Choose from the 12+ loaded profiles or enter a custom compound. See the calculator →

Set vial + dose

Vial size, BAC water, target dose — Peptly computes the exact units instantly. How the math works →

Draw + log

See the visual syringe, draw confidently, log the shot in one tap. Tracker details →

See it in action

Built for clarity, not for show.

Download on theApp Store Get it now — takes one tap

Why Peptly

The privacy-first peptide app.

While other peptide apps ask for an account, sync to the cloud, and feed your data to AI models, Peptly stays where it belongs — on your phone.

🔒

Your data, your phone

No accounts. No servers. No third-party tracking. Your injection log never leaves your device.

⚡

Math, done for you

Most peptide apps disclaim away from dosing. Peptly actually does the reconstitution math — clearly, instantly, every time.

🎯

Built for the dose

Not a lifestyle tracker. Not an AI chatbot. Just the cleanest path from vial to confident dose.

Want the full picture? See about Peptly or how Peptly compares to other calculator apps.

Important

Peptly is a reconstitution calculator for research and educational reference. Values are arithmetic outputs only — they are not medical advice, not a prescription, and do not recommend any human use. Consult a licensed clinician before any injection.

Frequently asked

Quick answers.

Is Peptly free to download? +

Yes. Peptly is free on the App Store. The reconstitution calculator works fully without any subscription or sign-up.

Does Peptly work offline? +

Yes. Everything runs on-device. Your log, your protocols, your saved mixes — all stored locally on your iPhone or iPad.

Do I need to create an account? +

No. Peptly does not have accounts, sign-ups, or cloud sync. Nothing leaves your device.

Which peptides are supported? +

BPC-157, TB-500, Ipamorelin, CJC-1295, Semaglutide, Tirzepatide, Retatrutide, GHK-Cu, Tesamorelin, MOTS-c, NAD+, AOD-9604, plus a custom-compound option for anything else.

Can I export my injection log? +

Yes. The full injection log can be exported to CSV at any time.

Dig deeper

Calculators, references, and per-peptide guides.

Everything Peptly does on the web — math references, per-peptide pages, comparisons, and guides.

Get every dose right.

Free on the App Store. No accounts, no tracking, no cloud sync — just the math, done.

Download on the App Store iPhone · iPad · iOS 17.6+

Peptide reconstitution,
made clear.