Monitor supplement formula changes with dated label history
Free breathing, grounding and meditation tools in your browser
Stage
Startup
Not given
Founded
2026
Not given
Based in
US
SG
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
Breathing timer with box breathing, 4-7-8 and physiological sigh patterns
5-4-3-2-1 grounding exercise
Meditation timer with bell and rain sounds
15 guided audio tracks from 3 to 20 minutes
AI-generated narration using OpenAI text-to-speech
7-day beginner practice plan
Practice history and tension ratings saved locally
Optional Christian meditation with Scripture
Optional Buddhist meditation practices
What makes it different
Every number carries a date and source
No paid placement and no brand influence
Independent and founder-led company
Completely free with no app installation or account required
Tools run entirely in browser with no data sent to servers
Original scripts with transparent editorial standards and source verification
Multiple practice types to choose based on preference
Privacy-focused with no data selling or ad trackers
FormulaSignal
Breath Harbor