Levels Health is the leading CGM-based metabolic app. MyProtocolStack tracks labs, peptides, and macros. Different tools for different stacks.
Quick Take Levels Health is built around continuous glucose monitoring (CGM) — they put a Stelo or Libre sensor on your arm and you track real-time glucose response to meals, exercise, sleep, and stress. It's a powerful niche product for metabolic optimization. MyProtocolStack tracks lab biomarkers (drawn from blood), peptide protocols, macros, and body data — which doesn't include real-time CGM but does cover everything else longevity users track. We're not direct competitors so much as adjacent tools that often run side-by-side in serious metabolic stacks.
Levels is the CGM-app category leader for non-diabetics. They built the most consumer-friendly CGM experience — onboarding the sensor, the app's meal-glucose correlation views, the "Zone Score" that scores meals on metabolic impact, and the educational content from their team and Peter Attia.
Their core value prop is real-time metabolic feedback. You eat oatmeal, you see your glucose curve. You eat the same oatmeal with butter and protein, you see a flatter curve. Within weeks you have a personalized map of which foods spike your glucose and which don't.
Other strengths:
Levels is a CGM app. It is excellent at what it does, but its scope is narrow:
For users running peptide protocols or comprehensive longevity tracking, Levels is one input among many. Critical for the metabolic question, silent on the rest.
MyProtocolStack covers the layers Levels doesn't:
What we don't do (yet): real-time CGM integration. You can manually log a glucose reading, but we don't pair with a Stelo or Libre sensor. For users who want real-time glucose and the rest of the protocol stack, the practical answer is to run both apps.
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Levels recently restructured their pricing. Plans range from approximately $199/mo on a recurring basis (which includes the Stelo or Libre sensors shipped to you), with lower tiers if you bring your own CGM sensor. Annual options bring the cost down somewhat. The CGM sensors themselves are the bulk of the cost.
MyProtocolStack is $14.99/mo or $90/yr (50% off annual). No sensors included — we're not a CGM platform.
The cost math: a serious metabolic-optimization user often runs both — Levels for the CGM (~$200/mo, glucose-specific) plus MyProtocolStack for everything else (~$15/mo, labs + peptides + macros + body). Total ~$215/mo.
Levels and MyProtocolStack are complementary tools that often run together. Levels is the best CGM-paired metabolic app. We don't try to compete with that — building consumer CGM hardware and software is a different category of product.
What MyProtocolStack adds is the rest of the stack: labs, peptides, macros, body data, AI panel reading. For a serious longevity user, both products together cover the full picture: real-time glucose (Levels) + comprehensive labs and protocols (MyProtocolStack).
If forced to pick one without CGM: most peptide users will get more value from MyProtocolStack because the protocol-tracking layer is what doesn't exist anywhere else, while CGM data is somewhat replaceable with quarterly fasting glucose + HbA1c labs.
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*This article is for informational and educational purposes only. MyProtocolStack and Levels Health are tracking and education platforms. Neither product diagnoses, treats, or prevents disease. Consult a qualified healthcare provider before making changes to any nutrition, peptide, or pharmaceutical protocol.*
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