Type 1 diabetes management
Real-time glucose and alerts for intensive management.
CGM App Development
CGM App
We build continuous glucose monitoring apps on Dexcom and Abbott FreeStyle Libre data — real-time trends, glance-able glucose UX, and safe alerting — backed by HIPAA-ready pipelines and FHIR-native modeling.
HIPAA-ReadyDexcomFreeStyle LibreFHIR R4
Trusted by global innovators
What building a CGM app involves
A continuous glucose monitor generates a reading every few minutes, all day. The product challenge is turning that firehose into something a person with diabetes can act on in a glance — a current value, a trend arrow, time-in-range, and alerts that warn without crying wolf. The data challenge is ingesting it reliably from Dexcom and Abbott FreeStyle Libre without gaps.
Dexcom exposes data through its developer API and real-time share mechanisms; Abbott's FreeStyle Libre data is available through LibreView and its LibreLinkUp sharing pathway. We build the ingestion for both, handle calibration and unit conventions (mg/dL and mmol/L), and design a glucose UX that stays safe and legible under real-world conditions.
What it is
CGM apps make continuous data usable
A CGM app takes the continuous stream from a glucose sensor and turns it into a clear picture: where glucose is now, where it's heading, how much of the day is in range, and when to act. For people with diabetes and their care teams, that clarity is the product.
We build the ingestion from Dexcom and Abbott FreeStyle Libre, the analytics for trends and time-in-range, safe alerting, and caregiver sharing — all modeled to FHIR so the data is usable clinically, not just visually.
CGM data architecture
See how Dexcom and FreeStyle Libre feeds flow into a normalized glucose model powering trends, time-in-range, and alerts.
What we build into a CGM app
Reliable glucose data and a UX designed for split-second decisions.
Dexcom integration
Ingestion from the Dexcom developer API and real-time share pathways, with EGV (estimated glucose value) handling, trend direction, and sensor session awareness.
Abbott FreeStyle Libre integration
FreeStyle Libre data through LibreView and the LibreLinkUp sharing pathway, normalized to the same glucose model as Dexcom so the app is source-agnostic.
Glance-able glucose UX
Current value, trend arrows, and a time-in-range view designed for a two-second read, with color and typography that stay legible for low-vision and on-the-go use.
Safe alerting
Urgent-low, low, high, and rate-of-change alerts tuned to reduce fatigue, with predictive warnings and clear escalation — safety-critical logic held to a high bar.
FHIR glucose modeling
Readings normalized to FHIR R4 Observation with LOINC glucose coding and mg/dL / mmol/L unit handling, so data flows into care, analytics, and clinician review.
Where it runs
CGM app use cases
Type 2 & prediabetes coaching
Trend-based coaching and lifestyle feedback.
Diabetes clinic dashboards
Population glucose views for care teams.
Digital diabetes programs
CGM-driven virtual care and DTx experiences.
Caregiver monitoring
Remote follower views for pediatric and elder care.
Metabolic health apps
CGM as a signal in broader wellness and nutrition products.
Built for the moments that matter
CGM value is decided in the two seconds a user glances at the screen and the instant an urgent-low fires. We build for both.
2 sources
Dexcom + Abbott FreeStyle Libre
mg/dL + mmol/L
Dual-unit glucose handling
FHIR R4
Standards-based glucose modeling
Compliance-First Healthcare App Development Services Backed by Global Standards
15-Minute Scoping Call01
HIPAA
Health Insurance Portability and Accountability Act
Protect PHI with privacy-first architecture, encrypted storage and transmission, strict access controls, and traceable audit logs.
02
GDPR
General Data Protection Regulation
Implement lawful consent flows, data minimization, retention controls, and secure processing for sensitive health data.
03
FHIR
Fast Healthcare Interoperability Resources
Enable standardized health data exchange across apps, care teams, and systems through robust FHIR-ready APIs.
04
HL7
Health Level Seven International
Support enterprise-grade interoperability with HL7-based integrations for records, events, and clinical messaging workflows.
05
HITRUST
Health Information Trust Alliance
Align security programs to healthcare-specific control and risk management practices trusted by providers and ecosystem partners.
06
HITECH
Health Information Technology for Economic and Clinical Health Act
Design with breach notification readiness, digital record safeguards, and operational controls that support regulated care programs.
07
SaMD
FDA Software as a Medical Device
Plan software quality, traceability, and documentation pathways for products that may require SaMD review and submission.
08
MDR (EU)
Medical Device Regulation (European Union)
Prepare EU market-ready processes for risk classification, evidence tracking, and lifecycle governance under MDR expectations.
09
SAMHSA
Substance Abuse and Mental Health Services Administration
Apply confidentiality controls and consent-aware sharing models for behavioral and mental health data experiences.
Standards we build against
CGM standards
FHIRLOINCHIPAAAGPISO 15197
Our Process
How we ship a CGM app
Because CGM alerting is safety-critical, we design the data reliability and UX safety together from the start.
1.
Data & UX discovery
We map Dexcom and FreeStyle Libre data sources, define the glucose model and units, and design the glance-able UX and alert taxonomy.
Safety-first UX
2.
CGM ingestion
Dexcom and Libre integrations with gap handling, sensor-session awareness, and normalization to a single glucose model.
Reliable feed
3.
Trends, alerts & sharing
Time-in-range analytics, alert logic, and follower/caregiver sharing, validated against real glucose patterns.
Actionable
4.
Clinical review & go-live
FHIR write-back for clinician dashboards, reporting, and a phased launch with monitoring on data freshness.
Clinician-ready
Featured case study
Read Case StudyLera Health: compliant women's health platform
Related proof of compliant delivery: for Lera Health we turned continuous biomarker data into personalized, compliant guidance — the same discipline in data quality and patient UX that a safe CGM experience requires.
Why Partner With Us
15-Minute Scoping CallWhy teams build CGM apps with Agnotic
Glucose apps are safety-critical products. We build them with the care that demands.
Safety-critical discipline
Alert logic and data reliability engineered to a high bar, because a missed low is not a normal bug.
Multi-source, source-agnostic
Dexcom and FreeStyle Libre normalized to one model so your product isn't locked to a single sensor.
Glucose UX depth
Glance-able, accessible interfaces designed for real decisions, not dashboards to admire.
FHIR-native, clinician-ready
Standards-based glucose data that flows into clinician review and analytics without rework.
Turn a stream of glucose readings into confident decisions
CGM apps built on Dexcom and FreeStyle Libre data
Frequently Asked Questions
A CGM app MVP with one data source, core glucose UX, and alerting typically starts in the mid five figures. Adding a second sensor source, caregiver sharing, and clinician dashboards extends the range. Safety-critical alert logic is where we invest the most engineering care.
Ready to build a CGM app users trust?
Tell us your target sensors and audience. We'll return a plan with a Dexcom/Libre data strategy, a glucose UX approach, and safe alerting.
contact@agnotic.com
Partnerships
contact@agnotic.com