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FormulaSignal vs Luminelle

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

FormulaSignal compared with Luminelle
DetailFormulaSignal logo FormulaSignalLuminelle logo Luminelle
What it doesMonitor supplement formula changes with dated label history Scan food and skincare barcodes to see ingredient scores, track calories, and log your menstrual cycle
StageStartup Not given
Founded2026 Not given
Based inUS RO
Pricing modelFreemium Freemium
PricingFree 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. Free: unlimited barcode scans, five photo scans a day, daily skin selfies, cycle tracking. Luminelle Pro: $9.99/month or $69/year, adds unlimited photo scans, patterns across products and cycle data, Shelf Check, and Ask Luminelle.
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
  • Scan product barcodes to see a 0-100 ingredient score checked against EU and California regulations
  • Photograph meals to estimate calories and macronutrients
  • Log menstrual period and see cycle phase on every scan
  • Daily skin selfies with AI observations
  • Personalize ingredient alerts for fragrance, alcohol, essential oils, sulfates, silicones, retinoids, acids, parabens and PFAS
  • Read ingredient lists from photos when barcode is not recognized
  • Patterns feature shows links between products, meals, cycle and skin over time
  • Ask Luminelle feature answers questions about any product scanned
  • Shelf Check feature to review everything you own
What makes it different
  • Every number carries a date and source
  • No paid placement and no brand influence
  • Independent and founder-led company
  • Every flag links to the regulator's own words, not opinion
  • Scores ingredients by regulatory severity tier, not as a blanket concern list
  • Free tier is a real product with no card or trial clock required
  • Does not sell user data or show ads
  • Educational tool, not a medical device or diagnosis
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)5 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)64
Citation Flow (Majestic)2416
Referring domains (Majestic)222

6 details filled in for both companies.

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