The app, honestly
A reminder engine for the diabetes brain
Version one is out on the App Store: the nudge that learns when you actually eat, carbs off the barcode on a pack, and your CGM history read from Apple Health. This page is what is in it, what comes later, and what we deliberately left out.
iPhone only. Free. No account, no ads, nothing about your diabetes on a server of ours, and nothing that ever tells you how much insulin to take.
Prebolus nudges
Taking insulin before the meal instead of during it is the habit that helps most and slips most. The app learns when you actually eat, weekdays and weekends counted separately, and asks a little before.
A question about sequence, with no number in it. You pick which meals get one, you can add your own, and you can log from the notification itself. Curious about the science? Read why timing beats math.
The words are the app's. The frame around them is this website drawing a notification.
Carbs off the label, not out of the air
Scan the barcode on a pack and the carbs come from the label. Not a range, not a guess, and it costs nothing to run, which is why it is the primary way to log a packaged food rather than a fallback.
The record comes from Open Food Facts, the open food database, and the app says so on the card. Correct a number once and it remembers that food for next time. Eating at a chain instead? Those menus are on the phone already.
When the pack in your hand disagrees with the database, the pack wins. A carb figure is a reference, never a dose.
The words are the app's. The frame around them is this website drawing a card.
In version one
The rest of what is in it
Everything below is in the build on the App Store. Nothing here is a plan.
Before you install
Which sensors it can read, and which it cannot
T1DAL does not talk to your sensor. It reads what your CGM app has already written into Apple Health, which means it can read whatever gets written there and nothing that does not.
Dexcom writes to Apple Health. Turn sharing on in the Dexcom app and T1DAL can read it. Apple Health receives CGM data about three hours late, and that delay is the reason this is a picture of what happened rather than a live number. It is also why the app has no alarms and no arrows: it is not trying to be your CGM, and a retrospective view is a different, calmer thing than a screen you check all day.
Libre does not, today. Abbott's apps do not write glucose into Apple Health, so if Libre is your sensor, T1DAL cannot show your readings. Everything else in the app works: logging, nudges, barcodes, chain menus, the shelf, seasons. We are telling you here rather than letting you find out after installing. If a bridge app on your phone writes Libre data into Health, T1DAL reads that, because it reads whatever is in Health. If Abbott starts writing to Health, this paragraph and the panel beside it both change.
What it reads
From Apple Health only
Dexcom
Reads it
Turn sharing on in the Dexcom app.
Libre
Cannot read it
Abbott does not write glucose into Health.
A bridge app
Reads it
Anything that puts glucose into Health works.
Everything else
Unaffected
Logging, nudges, the shelf, seasons.
Health hands over CGM data about three hours late, so every number in the app is history. No alarms, no arrows, nothing to check all day.
Written on the phone
Smart where it is useful, silent where it is not
Two features use a language model, and both use the one built into iOS, so nothing leaves the phone. That also means they need an iPhone that has that model. On a phone without it the app says so plainly instead of sending your words somewhere, and every other screen works exactly the same.
Both stop at the same line as everything else: they will never tell you how much insulin to take. A model is good at noticing patterns and doing tedious prep. It is not your endocrinologist, and we will not dress it up as one.
Not in version one
What is not in it, and why
None of this is in the build on the App Store. It is here so the page is a complete answer rather than a flattering one.
Four things that will not change
Never doses
No feature will ever tell you how much insulin to take. Reminders and insights, yes. Doses belong to you and your care team.
Nothing leaves the phone
No account, no login, no server of ours holding a copy. Export everything to a file or delete all of it, from inside the app.
No ad trackers
Health data is not an advertising asset. No third-party trackers, no analytics SDK, no selling data, no exceptions.
Quiet by default
T1Ds already live with too many alarms. Every nudge has to earn its interruption, and snoozing is never a guilt trip.
T1DAL is a wellness app, not a medical device, and not medical care. It does not diagnose or treat anything. What the app does with your data is spelled out on the privacy page.
Out now
Get T1DAL on your iPhone
Free on the App Store. No account to make, nothing to buy, and everything it knows about you stays on the phone.
Release notes
Hear when something new ships
Version one is out. What comes next is on this page, and it lands in pieces. Leave your address and you get one email when something worth telling you about ships, and nothing in between. Tell us which mode fits you and it shapes what gets built next. That is the whole deal: no spam, no open tracking.