Keep your vial calculations
Record the vial amount and water volume alongside your calculation. Return to the details you entered instead of starting the math again each time.
Included free
The Peptide App · iPhone + free web tools
A free peptide app.
A clearer daily routine.
Keep your vial calculations, dose logs, schedules, and reminders together. The Peptide App is free on iPhone, with no subscription required.
Just need the math? Use the web calculator without an account or download.
Free peptide tracker and calculator
The tools for keeping track.
Without the subscription.
A calculation is useful in the moment. A record is useful next week. Keep both, along with the schedule and reminders you use day to day.
Log doses in one place
Keep a record of what you logged and when. A dose log is a record of your routine, not a recommendation to take a particular peptide or amount.
Included freeOrganize schedules and reminders
Put the timing from your existing instructions into a schedule and set reminders on your iPhone. Check your written instructions before making changes.
Included freeKeep notes on your progress
Bring your logs and progress records together over time. Use them to remember what happened and prepare questions, not to prove that a treatment works.
Included freePreviously paid for the app, or seeing in-app purchases on Apple's listing? Read our pricing and previous-purchase guide.
Recorded in the app
See how the details stay together.
Two short, silent walkthroughs using demo data. Press play to explore vial records or see the calculator update.
Keep your vial records
Open a saved vial to review its amount, water volume, and remaining-dose estimate.
Check the calculation
Change the water volume and watch the result update. Switch between syringe units and milliliters.
All entries shown are demo data, not recommended doses, treatment instructions, or a suggested stack.
Start in your browser. Keep going if you want.
Free on the web.
More ways to keep track on iPhone.
You don't have to install anything to find useful information. Explore the library or use the calculator in your browser. Choose the app when you want personal records and native reminders.
On Android? The web tools work in your browser too. We currently offer the native app on iPhone.
| What you want to do | Website | iPhone app |
|---|---|---|
| Calculate concentration and U-100 units | Free, no signup | Free |
| Browse peptide information | Free, no signup | Free |
| Build a schedule from your instructions | Free protocol builder | Free |
| Save vial records and log doses in your account | Continue in the app | Free |
| Receive native dose reminders | Use the iPhone app | Free |
Use the parts you need
From a quick calculation
to a record you can return to.
- 01
Bring your instructions
Have your product label and any written guidance ready. Keep the peptide name, vial amount, and units distinct. A tracker helps organize those details; it cannot decide what is appropriate for you.
- 02
Check the calculation
Use the free peptide calculator with your target amount and water volume. Review the result and units. Our calculation methodology explains the arithmetic and its limits.
- 03
Keep a useful record
In the app, save your vial details, organize your schedule, and log your routine. For a checklist that also works with a notebook, read how to track a peptide protocol.
Choosing a free peptide app
Check what “free”
actually includes.
Before moving your routine into any app, check whether access expires after a trial, which features need payment, and whether it works on your phone. Free to download does not always tell you what happens after setup.
Then try a task you will repeat: record a vial, find an earlier log, or change a reminder. If you only need a calculation, a web tool may be enough. If you want a record over time, look for logging and scheduling as well.
We make The Peptide App, so this is a description of our own product, not an independent ranking. Read the privacy policy, check the App Store listing, and ask us a question before adding personal records.
A resource beyond the app
Keep learning. No download needed.
The free app is one part of The Peptide App. Our website gives you places to start your research, check the math, and understand what the tools can and cannot tell you.
Reference
Peptide library
Explore individual profiles and their source links.
Start hereResearch basics
A starting point for checking evidence and product information.
Planning toolProtocol builder
Organize existing instructions into a schedule on the web.
Educational information and organizational tools only. They do not diagnose, prescribe, establish product safety, or replace guidance from a licensed healthcare professional.
Before you get started
Free peptide app
questions, answered.
Product information from The Peptide App team.
Updated September 20, 2026.
Is The Peptide App actually free?
Yes. The current app gives you access to vial calculations, dose logging, schedules, reminders, and progress tracking without a subscription. The website's calculator and peptide library are also free. You do not need to buy peptides to use these tools.
Is this a free trial or a paid subscription?
No subscription is required for the current app. This is not a time-limited trial. Previous purchases have a separate billing-help page so existing customers can check their Apple billing status.
What if I see an old subscription or in-app purchase?
The app previously offered subscriptions. The current app does not require one. If you see an older purchase entry or have a question about a charge, check Previous purchases in the app settings or contact [email protected]. Do not assume that downloading a free update changes an existing Apple billing record.
Can I use the peptide calculator without downloading the app?
Yes. The free web calculator works in your browser without signup. Enter the vial amount, target amount, and water volume from your instructions. It calculates concentration and U-100 syringe units. Downloading the app is optional.
Is there a free peptide app for Android?
Our native app is currently offered on iPhone. Android users can use the free calculator, peptide library, and protocol builder in a web browser. The website does not provide the iPhone app's native reminders or dose-logging experience.
Do I need an account?
You do not need an account to use the web calculator or read the peptide library. Saving your personal routine and tracking records in the iPhone app uses an account. Read our privacy policy before adding personal information.
What should I look for in a free peptide tracker?
Check which tools are included after setup, whether free access expires, whether your phone is supported, and how the app handles your records. A calculator answers a math question; a tracker also keeps logs and schedules. Choose the tools you will actually use rather than relying on a best-app label.
Does the app tell me which peptide or dose to take?
The calculator and tracking tools do not establish what is appropriate for you. Use amounts and preparation instructions from your product label or licensed clinician. Educational library content and saved routines are not prescriptions or medical advice.
Your next step
Try a tool today.
Keep what helps.
Explore the free calculator in your browser, or take your records with you in the iPhone app.