Monitor supplement formula changes with dated label history
Stage
Not given
Startup
Founded
Not given
2026
Based in
GB
US
Pricing model
Free
Freemium
Pricing
Not given
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.
Key features
Counts UK units with prices and calories from over eleven hundred drinks
Gradual reduction plan within UK clinical guidance limits
Running total display against yesterday and usual day
Weekly and monthly charts with streaks tracking
Apple Health integration for heart rate, HRV and sleep data
Lock Screen and Home Screen widget logging
iCloud sync across devices
Export log as backup or readable summary
Offline functionality
No account or subscription required
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
What makes it different
Completely free with no subscriptions, purchases or advertisements
Private by design with no server or account, data synced only through your own iCloud
Open source code for transparency and verification
Comprehensive drink catalogue with over eleven hundred drinks at label strengths
Works completely offline including drink catalogue and prices
GrogLog
FormulaSignal