Free on the App Store

BoostT1D for iPhone

Plenty of apps will store your numbers. BoostT1D reads the CGM setup you already have and helps you make sense of them, what your week actually did, what your meals looked like, and what to ask your care team next time. Built by a teen living with Type 1, for everyone living with it.

Requires iOS 18 or later. No account needed.

The BoostT1D dashboard on iPhone: a glucose reading of 125 mg/dL in range and steady, pulled from Nightscout, with active insulin and carbs, the last meal logged, and a glucose trend chart against the target range.

Your data, wherever it lives

Connects to the CGM setup you already have

Bring in readings from Nightscout, Dexcom Share, or LibreLinkUp, no new hardware, no switching systems. If you run an automated loop such as Trio, Loop, or AndroidAPS, BoostT1D reads that too and understands which insulin your algorithm delivered rather than treating it as decisions you made.

Nightscout, Dexcom Share, and LibreLinkUp supported
Works alongside any Nightscout-connected loop
Readings cached on device so the app still works offline

The Blood Glucose screen on iPhone: estimated A1C of 7.3%, an average of 162 mg/dL, standard deviation and variability, time in range, and a glucose chart against the target band.

Meals

Estimate carbs from a photo

Take a picture of your plate and get a carb estimate with the reasoning behind it, plus protein, fat and fibre. Adjust anything that looks off before you save it, the estimate is a starting point, not the last word.

Carbs, protein, fat and fibre
Every value editable before saving
Saves to your food log with what you actually ate

The Snap a Meal screen on iPhone: a photographed bowl of oatmeal with blueberries, banana and granola, analysed into 140g carbs, 730 calories, 18g protein, 13g fat and 12.5g fibre, with a written description of the meal.

Patterns

See the pattern, not just the number

BoostT1D looks across your last few days for things worth noticing, overnight lows, a time of day that consistently runs high, variability that's creeping up, and explains what it found in plain language, with the days it's based on.

Recurring highs and lows by time of day
How often each pattern actually occurred
Written for a conversation, not a dashboard

The What Happened screen on iPhone, on the Patterns tab: repeated dinner highs on five of seven days, the days it occurred, plausible causes, and questions to ask a doctor.

Appointments

Walk into your visit prepared

Turn weeks of data into a report you can hand over: what changed since last time, the patterns that stood out, your therapy settings, day-by-day detail, and space for the questions you want answered. Export it as a PDF and email it ahead.

Ambulatory glucose profile and time in range
Day-by-day insulin and carb detail
Your own questions, saved between visits
Shareable PDF

The Doctor Visit report on iPhone: the patterns BoostT1D detected over seven days, each with how often it occurred, possible contributing factors, and questions to ask the care team.

What BoostT1D is not

BoostT1D is not a medical device and does not provide medical advice, diagnosis, or treatment recommendations. It does not tell you how much insulin to take. It helps you see your own data clearly and bring better questions to the people who do advise you. Always consult your healthcare provider before making any changes to your care.

Read the full disclaimer, privacy policy and terms.

There’s more to this than data

BoostT1D also connects people living with Type 1, buddies who get it, volunteers who show up, and resources for anyone newly diagnosed. That part lives here on the web.

Find a buddy Newly diagnosed?