Your Pacemaker. Your Data. Your Control.
The first app purpose-built for gastroparesis patients living with a gastric electrical stimulator. Track every setting change, log clinically-validated GCSI symptoms daily, see exactly which adjustments improved your quality of life, and carry an offline ER card that could save your life.
Supports Enterra I, Enterra II, and other gastric neurostimulators.
Built for People Who Live With GP
If you have a gastric electrical stimulator, you know the drill: you see your GI every few months, they tweak the settings, and you go home hoping it helps. But between visits you're left guessing -- did that amplitude change actually reduce my nausea, or was it just a good week?
Leo gives you the data to answer that question. Log your symptoms every day using the same validated scale your doctor uses (GCSI), then see your score plotted against every device adjustment on a timeline. When you walk into your next appointment, you'll have evidence, not guesses.
- Know exactly which settings improved your symptoms
- Show your doctor objective data, not just "I think I felt better"
- Spot patterns between meals, stress, and flares
- Never scramble for your serial number in an emergency
- Share your device card with any ER in seconds
12
GCSI symptoms tracked
5
Interactive chart types
7
Device parameters
0
Internet needed for ER card
Your Complete Device Profile
Store every detail of your gastric stimulator -- from model and serial number to the exact parameters programmed at your last visit. Supports all current GES devices.
Enterra II (Model 37800)
S/N: ABC12345678
Amplitude
5.0
mA
Pulse Width
330
µs
Frequency
14
Hz
Cycling ON
0.1
sec
Cycling OFF
5.0
sec
Impedance
varies
Ω
Enterra I, Enterra II, or Custom
Select your model from a picker or enter a custom device name. MRI compatibility is set automatically for known models.
All 7 Programming Parameters
Amplitude (mA), pulse width (µs), frequency (Hz), cycling ON/OFF times (sec), impedance (Ω), and voltage (V). Standard Enterra baselines shown as reference.
Battery Status Tracking
Record battery status (Good, Fair, Low, End of Life) and last checked date. Color-coded so you never miss a replacement window.
Surgeon & Clinic Info
Store your implanting surgeon's name, phone, clinic, and hospital. Tap-to-call directly from the app or your ER card.
MRI Safety Badge
Prominent green (MR Conditional), red (MR Unsafe), or gray (Unknown) badge on every screen where your device is displayed.
Clinically-Validated GCSI Diary
The Gastroparesis Cardinal Symptom Index (GCSI) is the gold-standard patient-reported scale used in clinical trials and GI practices worldwide. Leo implements the full validated scale so your daily logs speak your doctor's language.
- Nausea
- Vomiting
- Early Satiety
- Postprandial Fullness
- Loss of Appetite
- Excessively Full
- Bloating
- Stomach Visibly Larger
- Upper Abdominal Pain
- Reflux / Heartburn
- Constipation
- Diarrhea
How Scoring Works
Each symptom is rated 0 to 5: None, Very Mild, Mild, Moderate, Severe, Very Severe.
Leo calculates three subscale averages (nausea, fullness, bloating) then takes their mean as your total GCSI score. This is the exact formula used in published gastroparesis research.
Extra symptoms (reflux, constipation, diarrhea) are tracked for your records but are excluded from the official total to keep your scores comparable to clinical data.
None
0
Mild
0-1.5
Moderate
1.5-2.5
Severe
2.5-3.5
Very Severe
3.5-5
Today's GCSI
Feb 10, 20265 Interactive Chart Types
Visualize 30 days, 90 days, 6 months, or a full year. Every chart marks device adjustment dates with vertical lines so you can instantly see the before-and-after impact.
GCSI Total
Track your overall symptom severity day by day with a single-line trend and device adjustment markers.
Subscales
See nausea, fullness, and bloating as three separate color-coded lines to spot which subscale drives your score.
Individual Symptom
Pick any of the 12 symptoms and chart that one score over time -- perfect for isolating a single trigger.
Device Settings
View how any parameter (amplitude, pulse width, frequency, cycling) has changed across every adjustment visit.
Correlation
Overlay any symptom score with any device setting on the same timeline to visually confirm what's working.
The Correlation Chart
This is the chart gastroparesis patients have been waiting for. Pick any symptom (or your total GCSI score) and overlay it with any device setting on the same timeline.
“When my amplitude went from 5 mA to 7 mA on October 3rd, my nausea score dropped from 4.0 to 1.5 over the next two weeks.”
That's the kind of insight you can take to your next appointment. Your doctor sees objective, time-stamped evidence instead of “I think I felt better.”
Amplitude increased → Nausea decreased
How It Works
Add Your Device
Select Enterra I, Enterra II, or other GES. Enter serial number, implant date, surgeon info, and your current settings.
Log Symptoms Daily
Rate each GCSI symptom 0-5. Takes under two minutes. Leo calculates subscale averages and your total score automatically.
Record Adjustments
After each doctor visit, log the new settings. Leo batch-updates your device profile and snapshots your GCSI score at that moment.
See What Works
Open Charts and overlay your symptom trends with setting changes. Visually confirm which parameter adjustments reduced your symptoms.
Offline ER Quick-Share Card
When you're in the ER, the last thing you want is to explain what an Enterra is. Your ER card has everything hospital staff need -- and it works without internet.
EMERGENCY DEVICE CARD
Gastric Electrical Stimulator
Device
Enterra II (37800)
Serial
ABC12345678
Implant Date
Mar 15, 2025
MRI
MR Conditional
Current Settings
5.0 mA • 330 µs • 14 Hz • 0.1s ON / 5.0s OFF
Implanting Surgeon
Dr. Sarah Chen, GI Motility Center
No MRI Unless Cleared
MRI is contraindicated unless your implanting physician specifically approves a 1.5T scan under strict conditions.
No Shortwave Diathermy
Shortwave and microwave diathermy can cause tissue damage near the stimulator. Always prohibited.
No Therapeutic Ultrasound
Therapeutic ultrasound directed over the implant site or leads must be avoided completely.
Defibrillation Precaution
External defibrillator pads should be positioned as far from the neurostimulator as possible.
Surgeon Contact On File
Your implanting surgeon's name, phone, and clinic are stored for immediate ER access.
QR code + share sheet available in-app
Works Completely Offline
Your card is cached locally the moment you create or update your device. Turn on airplane mode, go underground -- it's always there.
Safety Warnings Front & Center
ER staff see MRI status, diathermy prohibition, and defibrillator precautions immediately. No scrolling, no searching.
MRI Badge Prominently Displayed
The MRI compatibility badge is the first thing an ER doc will look for. Green for conditional, red for unsafe, impossible to miss.
Tap-to-Call Surgeon
Your surgeon's phone number is a single tap away. In an emergency, seconds matter.
Share Instantly
Send via AirDrop, text, email, or print. The share sheet formats everything as clean text that any provider can read.
Always Up to Date
Every time you update your device or log an adjustment, the ER card re-caches automatically. No manual sync needed.
Labs That Matter for Gastroparesis
GP patients often have frequent blood work to monitor nutritional deficiencies, dehydration, and medication side effects. Leo tracks every panel your GI orders so you can spot trends between visits.
CBC (Complete Blood Count)
Track WBC, RBC, hemoglobin, hematocrit, and platelets. Spot anemia from malnutrition or chronic inflammation — common in GP patients on limited diets.
CMP / Electrolytes
Monitor sodium, potassium, chloride, CO2, calcium, magnesium, and phosphorus. Frequent vomiting and poor intake make electrolyte imbalances a constant risk.
BMP (Basic Metabolic Panel)
Glucose, BUN, creatinine, and eGFR alongside electrolytes. Essential for monitoring kidney function and dehydration status between GI visits.
Nutritional Labs
Vitamin D, B12, folate, iron, ferritin, and prealbumin. GP patients on restricted diets or tube feeds need regular nutritional monitoring to prevent deficiencies.
Liver Panel
ALT, AST, ALP, bilirubin, and albumin. Important for patients on long-term antiemetics, prokinetics, or parenteral nutrition that can affect liver function.
A1C & Glucose
Track A1C trends and fasting glucose over time. Diabetic gastroparesis patients need tight glucose monitoring — poor control worsens gastric motility.
Track Every Draw, Spot Every Trend
GP patients often get labs drawn every 1-3 months — but paper results pile up and trends get lost. Leo plots every value on a timeline with reference ranges and flags anything outside normal.
Add labs to your custom condition hub with the drag-and-drop builder, so your GP dashboard shows the exact panels your GI orders most — right alongside your GCSI scores and device settings.
- OCR scan lab results from photos or PDFs
- Auto-flag values outside reference ranges
- Overlay lab trends with GCSI scores on charts
- Include labs in health reports for your GI
Values flagged outside reference range
More Built-In
Provider & Caregiver Access
Your GI, caregiver, parent, or school nurse can view your device info and GCSI history through their linked Leo account. You control who sees what.
Adjustment History
Every parameter change is permanently recorded with the date, doctor name, notes, and your GCSI score at that moment. Never lose a visit's details again.
Gamification Points
Earn XP for logging GCSI entries (15 pts), recording adjustments (20 pts), and creating your device profile (15 pts). Stay motivated to keep tracking.
Unified Calendar Integration
GCSI entries and device adjustments appear in Leo's unified calendar alongside medications, vitals, symptoms, and journal entries.
HIPAA Audit Trail
Every read and write to your device data is logged for HIPAA compliance. You can see exactly who accessed your information and when.
Health Reports
Include your GCSI trends and device settings in Leo's drag-and-drop health report builder. Generate PDFs for your doctor in seconds.
Stop Guessing. Start Knowing.
You already have a pacemaker for your stomach. Now get the app that tells you if it's working.
Free for all gastroparesis patients. No subscription required for core features.