Andrew, outdoors

About Tidlo

Tidlo is a practice space for adults living with Type 1 Diabetes. Most of T1D is decisions. You already know what you're supposed to do. What's hard is doing it at 3am, or halfway through a run, or when the pizza is already on the table. Tidlo lets you practise those moments without having to live with the outcome.

I'm Andrew. I've had Type 1 for 22 years, since I was 15, and I design learning for a living. I'm not a doctor and I'm not a wellness influencer. I've treated every kind of hypo, rage-bolused plenty of stubborn highs, and stared at a CGM graph at 3am wondering what went wrong. Tidlo is the thing I wished I'd had.

Think flight simulator, not textbook

Pilots don't learn to handle an engine failure by having one. They practise it until the right response is second nature. That's the idea here. You make decisions, the simulation shows you what happens, and you get better at the thing that actually matters: reading the situation and choosing on purpose.

Andrew outdoors with a sensor on his arm, mid-conversation.

What's inside

The Daily Trace

One puzzle a day. Read the situation, sketch where you think the line goes, then watch what really happened. Ninety seconds, and you get a little better at reading your own graph.

Play today's puzzle →

The daily puzzle at the reveal on a phone: three fact chips for a pizza night, then the glucose chart with the sketched guess as a dashed line and the real line drawn over it in blue, peaking at 11.0.

Decision Labs

Twenty-one short scenarios across seven zones: food, movement, signals, systems, mindset, life, and the foundations. You make the call you'd really make and the trace plays out from there, including the version where it doesn't go well. Then a debrief on why.

Browse the labs →

A Decision Lab decision point on a phone: your CGM reads 3.0 with a double down arrow at 3am, what do you do, with tick-box options such as take fast carbs, wait ten minutes and check again, or wake your partner.

The course

Seven modules on living with Type 1, built around three layers: the clinical side your care team owns, the practical side you can get good at, and the mental load nobody talks about. Module 1 is live now, with more on the way.

Start the course →

Lesson 1.1 on a phone, A normal Tuesday morning: a progress rail, then moments from the morning with the objects you can tap to find a decision, one of them found and marked Estimate the carbs.

The hummingbird is Tid. A hummingbird holds steady in the air through constant tiny corrections, which is exactly what living with Type 1 asks of you.

Tidlo works however you use a screen, including without dragging and with motion turned off.

Keep in touch

I'm starting to share how I manage T1D and how I built this.

Tidlo is an educational simulation. It does not provide medical advice and must never be used to make real-world insulin or treatment decisions. Always consult your healthcare team before making changes to your diabetes management.