Free · iOS & Android · No Account Required
Reconstitution, Custom Draw, PK half-life, TRT ester, GLP-1, and stack cost. Built by IMA, LLC. 14-day pro trial — all features unlocked. Free tier: 1 protocol, 2 items. Works on iOS and Android.
→ Free to start · 14-day trial · 1 protocol free forever
6
Calculators included
22
Compounds in PK database
$0
Cost — free forever
2
Unique tools found nowhere else
Market comparison
PeptideCalc.io charges $9.99 for fewer tools, iOS only. Here is the full picture.
| Feature | Peptide Calculators Free · iOS + Android |
PeptideCalc.io $9.99 · iOS only |
Dose Freemium · iOS only |
Hacksmith Free · Web only |
|---|---|---|---|---|
| Reconstitution Calculator | ✓ | ✓ | ✓ | ✓ |
| Custom Draw Mode | ✓Only | — | — | — |
| PK Half-Life Plotter | ✓ 22 compounds | ✓ Basic | ✓ Basic | — |
| TRT Ester Calculator | ✓ 6 esters | — | — | — |
| GLP-1 Calculator | ✓ | — | — | — |
| Stack Cost Calculator | ✓Only | — | — | — |
| Android | ✓ | — | — | ✓ Web |
| Price | Free | $9.99 | Freemium | Free |
The six tools
01 —
Reconstitution Calculator
Enter peptide mg and target dose in mcg. Returns exact BAC water volume and concentration per unit on a U-100 syringe. Works for all lyophilized peptides.
Core02 —
Custom Draw Mode
Backwards reconstitution. Specify your target syringe draw in units — get the exact BAC water volume to add. No other free app has this.
Unique03 —
PK Half-Life Plotter
Multi-compound pharmacokinetics. Up to 4 compounds, dose superposition, 22 compounds in the database. One-compartment first-order elimination.
Advanced04 —
TRT Ester Calculator
200mg Testosterone Cypionate ≠ 200mg testosterone. Shows actual free T content across 6 esters at any prescribed dose.
TRT05 —
GLP-1 Calculator
Variable vial sizes, changing titration schedules. Enter vial size and BAC water — get dose per unit for semaglutide or tirzepatide.
GLP-106 —
Stack Cost Calculator
The only free protocol cost calculator. Enter compounds, doses, frequency — get cost per vial, week, and month across your full stack.
UniqueBeyond the calculator
Peptide Calculators handles the math. Protocol handles everything else — dose logging, injection site rotation, bloodwork tracking, AI stack analysis, 81 compound profiles, and cycle planning. iOS and Android. $7.99/month.
$7.99 / month
FAQ
Is this really free?
Yes. The free tier includes one protocol and two items. All pro features are unlocked for 14 days from first launch — no credit card required. After the trial, the free tier stays active with one protocol and two items. Upgrade anytime for full access.
What is Custom Draw mode?
Most calculators work forward: specify BAC water, get concentration. Custom Draw works backwards — specify the draw you want on your syringe and your target dose, get the exact BAC water volume to add. Only available in this app and in Protocol.
Is this available on Android?
Yes. It is the only free full-featured peptide calculator suite on Android. PeptideCalc.io is iOS only.
Does the app store my data?
No. All calculations happen on your device. No account required. Nothing leaves your phone.
What is the difference between this app and Protocol?
Peptide Calculators is calculators only. Protocol adds dose logging, injection site rotation, bloodwork tracking, AI analysis, 81 compound research profiles, and cycle planning. Protocol is $7.99/month. This app is free.