Dose logging
Log a dose
in two taps.
A few taps and you're done. Zest saves the details, updates your history, and keeps your routine on track.
See how logging works ›
Zest
Peptides,made simple.
Everything you need to research smarter, calculate with confidence,
stay consistent and take control of your peptide journey.
Free to download. Calculator and research library are free forever.
Your calculator doesn’t remember your doses. Your reminders don’t update your inventory. And your spreadsheets don’t know your wellness goals. Zest brings it all together in one refreshingly simple app.
0 app
Replaces your calculator, alarms, notes app, sticky notes and spreadsheets.
0 math
Reconstitution made simple, with clear calculations you can trust.
0 days
Explore every Zest Plus feature, completely free. No card needed.
Get The Squeeze
Explore Zest FeaturesLog a dose
Reminders
Reminders that
fit your day.
Inventory
Every vial,
accounted for.
One less thing to remember, with everything you need to stay stocked and ready.
Insights
See your
consistency.
Go beyond tracking with personalized insights that reveal your patterns, progress, and wins along the way.
Daily check-in
Your wellness,
beyond the dose.
From mood and sleep to daily habits, connect the little details that help tell your bigger story.
Research Library & Guides
Research peptides
with confidence.
Explore peptide research, get answers with Zest AI, and follow beginner-friendly guides. Everything you need to learn with confidence. Free to explore.
Browse the library ›
The Calculator
All the math.
None of the guesswork.
Take the confusion out of reconstitution. Enter your details, and Zest turns
the math into clear measurements on a visual syringe guide.
Zest calculates using the information you provide. It does not recommend doses, prescribe treatments, or provide medical advice. Always verify your inputs and consult a qualified healthcare professional.
5:06
Calculator
G
DRAW TO · AOD-9604
0.3 mL · 30 units
▾
0
units
0.15 mL
0
5
10
15
20
25
30
15
Pull back until the plunger’s edge lines up with 15.
PEPTIDE
AOD-9604
IN THE VIAL
5 mg
WATER ADDED
3 mL
YOUR DOSE
250 mcg
More details
Strength, doses per vial, how we got this
Save as a protocol
Reminders + vial tracking
Build protocol
01
Pick your peptide
Search every common peptide.
02
Add your water
Tell Zest what’s in the vial.
03
See the exact units
Live, on a real syringe scale.
04
Check your numbers
Concentration details and alerts.
01
Pick your peptide
Search every common peptide.
02
Add your water
Tell Zest what’s in the vial.
03
See the exact units
Live, on a real syringe scale.
04
Check your numbers
Concentration details and alerts.
A day with Zest.
From the first reminder to the last check-in, it quietly keeps up.
7:00 AM
Today’s plan, ready.
Every dose for the day, in order.
12:05 PM
Logged in one tap.
Your doses and details, saved.
6:00 PM
Mixing a new vial?
Your vial details, ready for easy calculations.
9:00 PM
See what’s working.
Check in and watch the streak grow.
Personal means private.
Your peptide routine is your business. Zest organizes it,
it never tells you what to take.
Protocols & doses
Only you.
Health data
Never sold.
Medical advice
Never given.
Export or delete
Anytime.
Every day is a chance
to start fresh.
Download Zest free and have your first protocol set in minutes.
Coming soon
Zest will be available to download soon.
Coming soon
Zest will be available to download soon.
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