Limited iPhone beta · Built for NET cancer

Turn white noise into a Clear Signal.

Living with NET cancer is a full-time job. NET Tracker is the tool that finally fits.

NET Tracker learns your injection cycle, symptoms, food triggers, labs, and imaging history — so it can help you understand what the next 24 hours may look like and how to prepare for it. Not a generic health app. Not a spreadsheet. Built around the question you actually live with: what kind of day is tomorrow likely to be?

Early iPhone beta on TestFlight. Invitation availability may be limited.

Patient-owned record On-device chat where supported No ads, no data selling
NET Tracker home screen showing stability score, daily brief, and food AI analysis
Why it fits

Three things no other tracker does this way

Injection-cycle aware, from day one

Core forecasts, alerts, and coaching are anchored to where you are in the Lanreotide or Sandostatin cycle — especially the wear-off window.

A read on your next 24 hours

NET Tracker translates cycle day, symptoms, food, and history into a practical sense of reserve for the next meaningful 24 hours — and coaches you before it arrives.

Built for NET. Patient-owned.

Biomarkers, symptoms, trigger foods, and notifications are all built around the real NET experience — and your record stays in your hands.

Injection Cycle Intelligence

Your cycle is the clock everything else runs on.

Most health apps don't understand that NET patients often live on a 28-day injection rhythm. NET Tracker does. Once the last shot is logged, the app tracks exactly where you are in the cycle, treats the wear-off window as higher risk, and interprets symptoms differently on Day 25 than on Day 5. Over time, a Cycle Heatmap makes your personal vulnerability pattern visible.

  • Wear-off window flagged automatically as risk rises.
  • Alerts re-calibrate based on cycle day, not calendar day.
  • Cycle Heatmap surfaces your personal pattern over time.
DAY11OF 28 · STEADY
Tomorrow Heuristic · Cycle + recent signals
Harder window likely
Reserve: lower

Day 25 of 28 with two flushing logs in the last 48 hours. Aged-cheese exposure yesterday. Tomorrow looks closer to a quieter day than a recovery day.

Prepare for tomorrow
  • Keep dinner light and low-fat tonight.
  • Shift the morning walk earlier; clear the early afternoon.
24-Hour Window Intelligence

See tomorrow before it arrives — and prepare for it.

NET Tracker is built around the question patients actually live with: what kind of day is tomorrow likely to be? The app combines shot timing, recent symptoms, food context, and personal history to surface harder windows, stronger windows, and the practical next steps that turn a forecast into something you can act on.

  • Forecasts harder and stronger windows as patterns mature.
  • Explains why — cycle position, recent burden, food context, or incomplete data.
  • Turns the forecast into coaching through Daily Brief and Prepare for Tomorrow.
Flushing has picked up over the last 3 days — noted alongside Day 24 of your cycle. Want to talk through what to mention at Thursday's appointment?
Yes — and pull my last CgA trend too.
CgA is up 14% since January. I'll add it to your Appointment Prep with your recent symptoms grouped by cycle phase.
On-device chat · Apple Intelligence Medication safety guardrails
AI Companion

Daily intelligence, with clear disclosure.

The AI companion isn't a generic wellness bot. It can answer based on your recent labs, scan findings, current cycle day, symptoms, and food history. NET Tracker includes an on-device chat option on supported Apple Intelligence devices. Optional Gemini-powered features provide richer food, lab, scan, and chat analysis; when those features are enabled, selected data is sent to Google's API for processing.

  • Context-aware answers grounded in your own records.
  • On-device chat available on supported devices; Gemini features are opt-in.
  • Safety guardrails for medication and medical language.
Food Trigger Detection

Find the triggers your body actually responds to.

Many NET symptom spikes are shaped by food, anatomy, cycle timing, or some combination of all three. NET Tracker helps connect meals with what happens afterward, checks back at clinically relevant timing, and builds a clearer trigger profile without blaming the patient.

  • Photograph a meal for an opt-in NET risk read.
  • Closed-loop follow-ups timed to your anatomy and cycle phase.
  • Safer alternatives suggested when a food looks risky.
Trigger profile Last 30 days
Aged cheese 82%
Red wine 74%
Smoked fish 58%
Tomato sauce 36%
Banana 12%
CgA trend
CgA · ng/mL · 6-month trend · Signatera paired
Reports & Appointment Prep

Bring a clearer story to your next appointment.

NET Tracker keeps symptoms, injections, medications, labs, scans, providers, and food history in one patient-owned record — with summaries and exports designed to make care-team conversations easier. NET-specific biomarkers like CgA, 5-HIAA, and Signatera are first-class, and CSV / JSON / FHIR exports keep your record portable.

  • Appointment Prep summaries
  • Labs & imaging
  • Treatment history
  • Provider directory
  • CSV / JSON / FHIR export
  • AI monthly summary
Your Symptoms, Your Language

Custom symptoms, in your own words.

NET patients often experience symptoms that don't fit standard checklists. Track up to 25 of the things you actually feel — and those words become part of your summaries, reports, and AI context, so nothing important gets translated away.

Daily Brief

A short, plain-English read on today.

Each morning, NET Tracker pulls together your cycle phase, recent symptoms, and food context into a brief that says what kind of day this is likely to be and what to do about it — so you start ahead of the window rather than behind it.

Built for NET

Calibrated to NET pathology, not adapted from a general chronic-disease app.

Patient-owned record

No developer-controlled health-data server. Your data lives in your own iCloud — not ours — and is never sold.

On-device + clear AI disclosure

On-device chat on supported Apple Intelligence devices. Optional Gemini features send selected data to Google’s API when you enable them.

Limited TestFlight beta

Early iPhone beta on TestFlight. Invitation availability may be limited while release gates are still closing.

Founder story

My Story

For thirty years, doctors told me nothing was seriously wrong. IBS. Stress. Anxiety. Crohn's. The usual answers when nobody can figure out what's actually happening.

Every time, the advice was the same: track what you eat and how you feel. Avoid the things that trigger symptoms.

I did what they said. For thirty years I tracked. For thirty years I avoided. And for thirty years I kept asking myself the same question nobody ever answered:

Why am I tracking this? To what end? How is this actually helping me?

What nobody figured out for three decades was that a tumor was quietly growing in my small intestine.

By the time anyone connected the dots, it had spread to my liver. Fifteen tumors. Stage 4 metastatic neuroendocrine cancer. Diagnosed in 2025 at 47 years old.

Surgery removed my primary tumor and three and a half feet of my small intestine. Monthly injections became my new reality. So did something nobody warned me about: my entire life now runs on a 28-day medication cycle.

I looked for an app that understood that. One that didn't just collect data but actually answered the question I'd been asking for thirty years.

There wasn't one.

So I built it myself. During the seven good days each month when my energy and pain allow serious work. Using my own symptoms, my own injection cycles, my own biomarkers as the test case.

ClearSignal Health has no investors, no corporate backing, no venture capital. Just a patient who spent thirty years tracking data with no answers, who finally built the tool that gives them meaning.

Steve Petersen
Founder, ClearSignal Health
“I tracked my symptoms for thirty years with no answers. I built this so that never happens to another patient.”

Join the limited TestFlight beta.

NET Tracker is in a limited iPhone beta on TestFlight. Early testers help verify onboarding clarity, prediction usefulness, AI behavior, food follow-up flows, privacy disclosures, and report accuracy before wider release. Invitation availability may be limited while readiness gates are still closing.

iPhone only · Early beta · Not a medical device — does not diagnose, treat, or replace oncology guidance.