Get the app

Peptide cycles, finally organised.

Peptidly is a peptide tracker and calculator for Android. Plan each cycle, log a dose in one tap, and let it do the reconstitution maths and count down your vials.

Get it on Google Play

Free to start · No ads · Android 7.0 and newer

Draw to

Type your dose above. The draw appears here.

—IU

— ml · 1ml insulin syringe

OF BARREL —
Concentration
5.00mg/ml
Doses / vial
—

BAC water is bacteriostatic water, used to mix a powdered vial. Units are the marks on a 1 ml insulin syringe; the app shows them as IU. The calculator only does arithmetic on the numbers you enter. It does not recommend a dose or a compound. Either a comma or a dot marks a decimal, so type thousands without a separator.

Open the peptide calculator

What you log comes off your stock.

  1. Today's doses are listed on Home. Tap Log on one and the time, the amount and, for an injection, the site are recorded.

  2. What you drew comes off the open vial, so the level on screen is what is left inside it.

  3. When what you hold for a cycle will last two weeks or less, Home names it and says roughly how long it has left.

Good morning

Alex

ACTIVE · DAY 20 Q4 2026 PRIMARY

Winter cycle

38 days remaining

OCT 0634% · TODAYDEC 02
Open Cycle

NEXT DOSE

AM blend · your dose in mcg

in 12m · 08:00

TODAY · OCT 25 · 0/2 Calendar

AM blend

your dose in mcg · 08:00 · Taken · Left thigh

your draw in ml · and in units

Next site · Left thigh

PM blend

your dose in mcg · 20:00 · Taken · Right thigh

your draw in ml · and in units

Next site · Right thigh

Amounts are blurred here. The app shows the doses you set.

Reminders that know what is due.

Every scheduled dose gets a reminder, at its time or up to 30 minutes before.

The reminder arrives at 07:45, 15 minutes before the dose.

  • Peptidly·now

    Dose Reminder

    Time to take AM blend

  • Peptidly·3h ago

    Low Stock Alert

    AM blend is at 18%, the amount left is hidden

Every site, remembered.

Log a dose and the site goes with it. Next time, Peptidly suggests the next area in your rotation and passes over any you used in the last three days.

  • Front and back, with your left on the left in both views.
  • Six squares on the abdomen for an exact spot.
  • Thighs, glutes and the backs of the arms, plus the shoulders if you switch them on.
  • A rest window from 1 to 14 days, and areas you don't use switched off.

Right thigh

Looking down at yourself — your left is on the left.

skipped resting: L thigh 2d ago

Tap an area to pick it. Amber means it was used in the last three days.

Cycles, the way you run them.

Each compound in a cycle carries its own schedule. This is the panel you fill in when you add one, shown here as a still.

  • Ramp up or taper

    Step the dose up or down on dates you choose.

  • Nine schedules

    Daily, twice daily, every other day, twice or three times a week, 5 on 2 off, weekly, every few days, or on and off blocks.

  • A reminder per time

    Each time gets its own reminder, with quiet hours when you want them.

  • Tied to your stock

    Vials you hold are counted down as you log.

Titrate the dose over time, on

Step the dose up or down on set dates (e.g. a ramp-up).

WHEN DOES IT START?

Already taking itTodayTomorrow (selected)Pick a date

SCHEDULE

DailyTwice daily (selected)EODTwice weekly3× weekly5-on-2-offWeeklyEvery X daysOn / off cycle

Only on certain days, off

e.g. mornings and evenings, Monday to Friday

08:0020:00

ACTIVE WINDOW · LENGTH

same as cycle

INVENTORY

VIALS IN STOCK

3vials

  • A start for each compound

    Already taking it, starting tomorrow, or on a date of your choosing.

  • Only on certain days

    Weekdays only, or mornings and evenings, set once.

  • Its own window

    A compound can run for the whole cycle or only part of it.

Privacy, in plain words.

What you record is personal. These are the main facts; the privacy policy has the rest.

Read the privacy policy

Stored

On your phone
In the app's private storage
A copy in the cloud
West EU (Ireland), encrypted in transit and at rest
Without a signal
Keeps working, syncs later

Never taken from your phone

Your location
The app never asks for it
Contacts and photos
Not read
Advertising ID
Not collected

Yours to control

Ads
None, and your data is never sold
Usage data
Never includes compound names, dose amounts or notes · can be switched off
Export
Cycles, vials and dose logs as JSON, free
Leaving
Delete your account in the app · 30 days to change your mind

Questions, answered.

What does it cost?

Peptidly is free to start and has no ads. The JSON export of your data is always free.

Is there an iPhone version?

No. Peptidly is an Android app on Google Play, and it runs on Android 7.0 and newer.

Does Peptidly give medical advice?

No. It records what you plan and log, and its arithmetic only uses the numbers you enter. It does not recommend compounds. Always consult a qualified clinician before starting, changing or stopping any protocol.

Does it work without a connection?

Yes. What you log is saved on your phone first and syncs to your account when you are back online.

Can I move to a new phone?

Yes. Sign in on the new phone and your cycles, vials and dose history come with you.

What can it track?

Vials you reconstitute, ready-mixed bottles and nasal sprays, in mcg or mg, with blends, injection sites and notes.

Which languages does it speak?

English, Spanish, Romanian and Italian.

Found a problem, or have an idea?

Use Send feedback in Settings, or email hello@peptidly.co.uk. Every message is read.

Start your first cycle.

Install Peptidly from Google Play. It is free to start, with no ads.

Get it on Google Play

Good morning

Alex

Welcome to Peptidly

Create your first peptide cycle
to start tracking doses.

Create Cycle