Compared with other peptide trackers

Most trackers in this category are a reminder app with a compound list bolted on. Four differences account for almost all of the gap.

Verified vendor purity data

We pay for third-party COAs and confirm them with the issuing lab. Nobody else in the category publishes lab-confirmed batch data at all.

Biometric correlation

Weight, resting heart rate, and sleep read from Apple Health and Health Connect, plotted against your protocol phases — not typed into a notes field.

Native on both platforms

SwiftUI on iPhone, Jetpack Compose on Android, one account across both. No web wrapper, no iOS-only waiting list.

Price

A free tier that keeps working, then $69.99 a year — $5.83/mo — or $8.99 month to month. Most competitors start at $8–15/mo.

Feature by feature

Capability
StackTrackr
Other peptide trackers
Lab-confirmed vendor purity data
COAs confirmed with the lab
Vendor claims, or nothing
Biometrics from Apple Health / Health Connect
Plotted against phases
Manual notes at best
Native iOS and Android
Both, one account
Usually one platform
Price
Free · $5.83/mo
$8–15/mo
Compound reference library
120+ compounds
Partial, or user-entered
Multi-compound protocols with phases and tapers
Built in
One compound at a time
Supply forecasting and run-out dates
Per compound
Not offered
Injection site rotation history
Visual history
Free-text notes
No ads, no data sold
Never sold, no ads
Varies; often ad-supported

Based on publicly available information as of August 2026. We don't name competitors — features change, and you should check the current version of anything you're considering yourself.