User Manual: your Type 1 diabetes companion
User Manual: your Type 1 diabetes companion
Chapter 1
BoostT1D is an educational companion app for people living with Type 1 diabetes. It brings glucose readings, meal logs, and insulin and carb events into one place, and turns that data into plain-language summaries you can use for your own awareness and bring to your care team.
Chapter 2
A bar along the bottom of the screen is always there. It has five buttons: Dashboard, Food, Insights, Logs, and Menu. Dashboard takes you straight home. The other four open a small panel above the bar with the screens in that group. Tap one to go there, or tap outside the panel to close it.
On every screen, your profile photo in the top left opens Profile, and the pink heart in the top right opens Support Us.
Chapter 3
The Dashboard is the home screen. At the top is the glucose card: your latest reading with its trend arrow, a status badge (Low, In range, Above range, and so on), and a range track with a marker showing where the reading sits between your low and high limits. Under the track is a line with the data source, the change from the last reading, and how old the reading is. The circular arrow on the card syncs again right away.
Below the card, Still on board shows your Active Insulin and Active Carbs. If they show "--", tap the info icon to see why. Usually the connection is stale or your data source doesn't report them.
Under that is a glucose chart. Pick 2h, 6h, 12h, or 24h to change the window, or tap History to open the full BG Log.
The three buttons in the top right are shortcuts. + adds an entry by hand: a glucose reading, an insulin dose, or a food entry. The camera opens Snap a Meal. The heart opens Support Us.
Chapter 4
Tap your profile photo in the top left, or go to Menu → Profile. Profile is a list of six sections, the same groups the app asked about when you first set it up. Tap one to open it.
If you switch data sources, the app asks whether both accounts belong to the same person. If they do, your stored data is kept. If not, glucose readings, event log entries, and food log meals on the phone are deleted so two people's data don't get mixed.
Chapter 5
Menu → Insulin Doses shows your basal rates, insulin-to-carb ratios (I:C), and insulin sensitivity factor (ISF), each by time of day, plus your daily basal total and insulin action time. These numbers feed the Insulin Calculator and the Therapy tab in What Happened.
If you use Nightscout, the doses are read from your Nightscout profile and the card at the top says Synced from Nightscout. You can tap Edit doses to change them, which keeps a copy on this device instead. With any other data source, you enter them here yourself. Enter them exactly as prescribed by your care team.
Chapter 6
Open it from Logs → BG Log, or tap History under the Dashboard chart. It shows your latest reading, then statistics for 1, 3, or 7 days: estimated A1C, average glucose, standard deviation, variability (%CV), and a time in range bar. Switch between Chart and Raw Data further down. Tap + to add a reading yourself.
Chapter 7
Logs → Event Log is one timeline of everything you or your pump logged: insulin, carbs, temp basal, profile changes, and other events. Filter by event type with the buttons at the top, and pick a window of 1 day, 3 days, 7 days, or 1 month. Tap + to add an event yourself.
Chapter 8
Open Snap a Meal from Food → Snap or the camera button at the top of the Dashboard. Tap Select Photo, pick or take a picture of your meal, then tap Analyze Food. You get a description of the meal and estimates for carbs, calories, protein, fat, and fiber. You get a few free estimates per day, and the count resets at midnight.
Under the result, Current Data pulls in your current glucose, target, carb ratio, correction factor, and active insulin and carbs. From there you can tap Save to Food Log or Bolus Calculator. Saving opens a short form where you can fix the description, the carbs, the time, or the photo, and add a note.
Food → Log lists your saved meals with the number of meals and total carbs for 1, 7, or 30 days. Tap an entry to see or edit it. The camera button opens Snap a Meal, and + adds a meal by hand. Entries are kept on your phone for 30 days.
Chapter 9
Tap Bolus Calculator under a Snap a Meal result. The calculator opens with the estimated carbs, current glucose, target glucose, carb ratio, correction factor, active insulin, and carbs on board already filled in.
The steps are at the top. Below them, under Your numbers, you can change any value and the steps update to match. Leave active insulin blank if you don't know it.
Chapter 10
Insights → What Happened? is a plain-language recap of the last 7 days in four tabs: Summary, Patterns, Therapy, and Days.
A short paragraph on how the week went, then time in range, low, high, and very high, compared with the week before, and your average glucose and estimated A1C.
The glucose patterns that repeated this week, for example "Morning highs" or "Repeated dinner highs". Each one has a day-by-day chart, possible causes, and questions for your care team. A Glucose by time of day chart shows your average for each hour across the week, and you can tap an hour to see what your profile asked for then and what was delivered.
A review of whether your basal rate, carb ratio, or correction factor may have played a part in how the week went. Your insulin settings lists anything worth raising as a short row. Tap one to see the current and suggested value, what the change means, why it came up, how strong the evidence is, what to check, and a question to bring to your care team. If nothing in the week passed the evidence and safety checks, the tab says so and doesn't suggest anything.
Food, exercise & timing context adds observations that may help explain the week, like repeated meals, activity, or when things were logged. Each one comes with its evidence and something to watch next. It is kept apart from the settings review and never says a setting should change.
Your changes answers a different question: for each therapy change the app has seen you make, did it help? Each change gets a verdict (Improved, Worse, Unchanged, Too early, or Not enough data yet). Tap one for the before and after numbers behind the verdict.
The numbers in the review always come from a fixed formula that is free and unlimited. When AI is available it adds explanation on top, but it never produces the numbers. With Advanced details turned on in Profile, a Detailed evidence section also appears here. It lists every setting window the app checked, the calculation for each, and why any setting couldn't be checked.
One card per day for the whole week, with average glucose, time in range, carbs, insulin, and lows. Tap a day to open it and see its meals and boluses.
Chapter 11
Insights → Doctor Report prepares a report for appointments over a 7 or 14 day window, in three tabs: Before Visit (what changed since your last appointment and the patterns the app found), Clinical (an ambulatory glucose profile chart and time in range statistics), and Details. Tap the share button at the top to export it as a PDF.
Chapter 12
How It Works is a guided tour. It opens by itself the first time you launch the app, and you can replay it from Menu → How It Works. Help has step-by-step setup guides (Connect Nightscout, Connect Dexcom Share, Connect FreeStyle Libre, and manual glucose entry) and guides for each part of the app. About shows the app version, what the app is for, and the legal notes.
Chapter 13
BoostT1D is free to use. Optional contributions through Stripe's secure checkout help pay for AI and hosting. They are not tax-deductible. Open it with the heart at the top of any screen or from Menu → Support Us.
