Monitor supplement formula changes with dated label history
Privacy-first cycle tracking for period, ovulation, and fertility estimates
Stage
Startup
Not given
Founded
2026
Not given
Based in
US
Not given
Pricing model
Freemium
Free
Pricing
Free Locker: up to 24 saved products with no card required. Signal Pro: $29.99/year (or $3.99/month), includes monitoring for up to 10 products checked daily with email alerts for confirmed changes and monthly Stack Brief.
Not given
Key features
Free Locker holds up to 24 supplements with dated labels
Daily monitoring of up to 10 products
Email alerts when formula changes are confirmed
Before You Reorder comparison of saved and current labels
561 product listings from 65 brands
Signal Verified labels read and dated twice independently
Product Ask feature for ingredient and formula questions
Category Ledger for supplement brands
REST API and MCP server for developers
Estimate next period date and period window
Calculate ovulation timing and fertile window ranges
Save period records to private account
View cycle history and compare patterns
Share results as image or text summary
Print results or save as PDF
Add calendar reminders for upcoming dates
Install as progressive web app
Multilingual support
Track irregular cycles with history-based projections
What makes it different
Every number carries a date and source
No paid placement and no brand influence
Independent and founder-led company
Privacy-first design that doesn't track or invasively collect sensitive information
Shows estimate ranges instead of false precision
Optional account features—basic tools work without sign-up
Clear medical disclaimers and educational focus, not medical device claims
Installable as app without requiring app store download
FormulaSignal
PeriodlyWise