Personal health tracking

Your personal
glucose signal.

Log blood glucose readings and meals, review your full day on a timeline, and uncover patterns — all from a fast, private web app built for daily use.

Password-protected & private — your data stays yours
WATCHTOWER
FRI · APR 03
Today
FASTING
88
POST-MEAL
124
07:05
FASTING 88
08:20
Breakfast 08:20
Oats · banana · milk
10:05
POST-MEAL 124
13:10
Lunch 13:10
Rice · dal · salad
Log
Timeline
Insights
Settings

Every signal, in one place.

Three screens that cover the full loop — from logging to understanding.

Screen 1
Log

Log blood glucose readings with type — fasting, post-meal, pre-meal, bedtime. Log meals and optionally link them to a reading. Track whether you took meds with each meal.

Screen 2
Timeline

Navigate any day and see your full signal in order — readings, meals, and meds. Quick stats for fasting and post-meal at a glance.

Screen 3
Insights

7-day trend chart, estimated HbA1c, spike pattern detection — which meals preceded readings above 180 — and a logging streak to keep you consistent.

Built for the signal.

Dark by default. DM Mono precision. Designed to open fast and get out of the way.

WATCHTOWER
Reading
94
mg/dL
FASTING
POST-MEAL
PRE-MEAL
SEND SIGNAL
Meal
Last signal — 7:03 AM · 88 mg/dL · Fasting
Log
Timeline
Insights
Settings
WATCHTOWER
Readings
47
Avg Fasting
88
Avg Post-Meal
124
In Target
91%
5.4%
Based on 47 readings · 14 days
Log
Timeline
Insights
Settings

Up in seconds.

No accounts. No syncing. Your data on your server.

01
Sign in

One shared password protects the app. No sign-up flow, no email, no OAuth. Just a secret you set in your .env.

02
Log your signal

Enter a glucose reading, tag it as fasting or post-meal, and optionally link it to what you ate. Takes under 10 seconds.

03
Track patterns

Insights surfaces spike patterns, estimates your HbA1c, and shows a 7-day trend — the more you log, the sharper the picture.

What's next.

Features in progress that change how you interact with the app.

Soon
MCP Support
Connect Watchtower as an MCP server — let AI assistants read and log your health data directly without opening the app.
Soon
Text your log
Send a text message to log a reading or meal. No forms, no tapping — just "94 fasting" and you're done.
Future
Nightscout Integration
Pull readings directly from a Nightscout site — the open-source CGM-in-the-cloud platform used by the diabetes community. Skip manual entry entirely if you wear a continuous glucose monitor.
Signal.
Log.
Improve.
→ LAUNCH APP
Requires your app password to sign in