A brief before the day starts
What your night did, how you slept, what the weather is about to do, and the one thing worth keeping an eye on.
You see the number. Nobody tells you why.
Dia turns your glucose into a state in plain words, like Steady or Falling Fast, and tells you the reason in a sentence. Made for every type of diabetes.
Download on the App StoreFree for one month, then $59.99 a year or $8.99 a month.
See it
The idea
187 mg/dL is a number.
“Steady, for the past hour” is an answer.
- Steady
- Rising
- Rising Fast
- Falling
- Falling Fast
- Running High
- Running Low
- Very Low
Eight state words, and how long you’ve been in one. That’s the glance.
Why Dia
The number was never the hard part.
Your CGM buzzes at 3 a.m. You squint at a number and an arrow, then lie there working out why. Dinner, the walk, the bolus, bad sleep? That’s one of 288 readings a day, and you’ve been solving each one from memory. Dia keeps track of the insulin still working, the meal, the walk and last night’s sleep, then says what they add up to.
Instead of decoding
You open it and already know.
Steady, for the past hour. Then the reason, in a sentence: “The 4u insulin from 70 minutes ago is at or near peak activity… Drops can come on fast in the next 30–60 minutes.” No arrow to interpret, no yesterday to compare against from memory, and no big number waiting to make you feel bad. The curve below it is the one place Dia plots real values, because a six-hour shape is worth reading.
After the spike
The spike you couldn’t explain gets a name.
Dia looks across your own days for what reliably moves you, then says it plainly. High-carb meals: on the four of the last seven days you had them, you spent about three more hours a day above range than on the days you didn’t. Patterns start to appear once Dia has a few days of your data to work from.
When you’re wondering
Ask the question you keep asking yourself.
“Why do high-carb meals affect me so much?” “How does sleep change my insulin sensitivity?” Dia answers from your own logs, your sleep and the weather where you are, instead of handing you a general article about carbs. It never tells you what to dose. That stays between you and your care team.
Instead of a spreadsheet
Logging takes seconds, and then it pays you back.
Photograph the plate or scan the barcode, tap the dose, or say a walk out loud to your Apple Watch. Your day builds itself into a timeline, and each entry makes tomorrow’s explanation more about you. Log as much or as little as you like. The state comes from your sensor, and the reasons get sharper with what you add.
Health, in context
Your sleep, heart and steps, against your own usual.
Four dials, each with a marker for where today sits against the last two weeks of you, never against anyone else’s average. And once a day, the Glucose outlook reads them together and says how your afternoon may lean.
Glucose outlook
Leaning higher
about 3 h more above range this afternoon than a typical one
Sleep
Steps
HRV
Resting HR
Sample data. The outlook is a rough comparison of your own days, made once each morning and held for the day. It describes what has come before what, not what will happen, and it never tells you what to dose.
Also in it
Morning to night.
A review after it ends
Day in Review lays your day’s states against everything you logged and everything your sensors noticed, so you can see what mattered.
Your week, as a story
A tap-through recap of your week: time in range, day by day, your best and hardest day, and what Dia noticed. Keep it to yourself or share the page.
A morning read on your afternoon
The Glucose outlook compares last night’s sleep, HRV and resting heart rate with your own days and says how your afternoon may lean, in hours. It learns from how often it was right.
On your wrist and Lock Screen
Widgets, a Watch app with complications and a Live Activity in the Dynamic Island put your state and trend one glance away. Tap the Watch graph for 6, 12 or 24 hours.
Meals by camera or barcode
Point at the plate or scan the pack and Dia estimates what’s on it. If it gets one food wrong, tap that food and scan the right one.
A report your clinic can read
One PDF with the standard CGM summary your clinic expects, built on your phone and shared by you. You preview it first, and it carries the real values, since those are what your clinic reads.
Finger-sticks work too
No CGM? Check-in mode shows your checks as they are, with no line guessing at the hours between, and reads your week from them.
Light, dark, and your units
Light, dark or automatic, in mg/dL or mmol/L, at the text size you set. A reading at your sensor’s limit says LOW or HIGH, not a made-up number.
How it works
Set it up once, then just glance.
01
Connect what you already wear
Dia reads glucose, sleep, heart rate and activity from Apple Health. It also connects straight to Dexcom Share and LibreLinkUp.
02
Live your day
Log what’s worth logging: a meal by photo, a dose, a walk. Your sensors and Apple Watch cover the rest, and weather and altitude arrive on their own.
03
Dia explains it back
Every state comes with a reason. Every morning and every night you get a short read on what happened. Week by week, the reasons get more specifically yours.
Your data
Your readings stay on your phone.
It’s your health data, so the rules are short and there are no exceptions.
- Dia reads from Apple Health and never writes to it. Your health record stays yours.
- Your glucose readings stay on your phone. The clinic report is built there too and shared by you, and it never passes through Dia’s servers.
- No ads, and your data is never sold or used for advertising.
- Analytics are anonymous and carry no glucose values or health data. You can delete everything from inside the app, any time.
Straight answers
Before you hand over an email.
Do I need a CGM?
No, but it’s where Dia works best. It connects to Dexcom through Dexcom Share and to FreeStyle Libre through LibreLinkUp, and reads glucose, sleep, heart rate and activity from Apple Health. Dexcom delays what it writes to Apple Health, so the direct connection keeps your curve current. If you use a finger-stick meter, Dia has a check-in mode that shows your checks as dots, with no line guessing at the hours between. Dia isn’t affiliated with or endorsed by Dexcom or Abbott.
Does it tell me what to dose?
No. Dia explains what’s going on and never says how much insulin to take or when. It doesn’t send low or high alerts either, and it doesn’t replace your CGM, your meter or your care team.
Where do I get it?
On the App Store, for iPhone. The Apple Watch app comes with it. Tap the badge at the top of this page, or search for “Dia”.
What will it cost?
The first month is free, and it’s the whole app. You add a payment method to start and can cancel any time from your iPhone’s Settings in about four taps. Cancel at least 24 hours before the month is up and you’re not charged. We’ll remind you a week ahead with the date and the amount. After that it’s $59.99 a year (about $5 a month) or $8.99 a month, renewing until you stop it.
There’s no permanent free version, on purpose. Dia gets more useful in week four than on day one, so we’d rather you judge the whole thing. No ads, and your data is never the product.
I was in the beta. What do I get?
Thank you. Beta testers get three months free on the App Store. We’ll email you an offer code, so use the address you gave us when you joined. We read everything you sent, and a lot of what’s in the app now started with one of your messages.
Is there an Android version?
Not yet. Dia is on iPhone and Apple Watch for now, partly because the Watch app, widgets and Live Activity are a big part of it. We’re building for Android too, and we’ll say so here when it’s ready.
When your glucose does something odd, you’d rather already know why.
Dia gives the odd reading a plain-word state and a reason, so it arrives with its context. Free for the first month, then $59.99 a year or $8.99 a month. Cancel any time.