The alarm that makes you do math

A math alarm does not stop ringing until you have solved a set of arithmetic problems correctly. Get one wrong and the counter resets. It works for a reason that has nothing to do with being clever: arithmetic is the one thing a sleeping brain genuinely cannot fake. You can swipe in your sleep. You can tap a button in your sleep. You cannot compute 47 + 68 in your sleep.

In Risly the math mission is one of four ways to kill the alarm, alongside a camera scan, a shake and camera-counted push-ups. There is no snooze button and no dismiss button behind them.

What a math mission actually is

The design detail that separates a good math alarm from a gimmick is chaining. One problem is not a mission, it is a speed bump: a half-asleep person can guess a single answer, and if the app lets a wrong guess through, the whole thing collapses. Risly gives you a run of problems, and a wrong answer sends you back. By the time you have solved four in a row you are demonstrably, measurably awake — because you could not have solved four in a row otherwise. That is not motivational language. It is the actual test.

Why math, when you are at your worst at math

That is the objection, and it is a good one. Sleep inertia hits exactly the cognitive systems arithmetic needs. Lynn Trotti’s 2017 review in *Sleep Medicine Reviews* describes impairments to attention and working memory that last 15 to 60 minutes after waking, worst when you are pulled out of deep sleep. Asking you to add two-digit numbers in that window is close to a worst-case task.

Which is the whole point. The mission is not there to test you. It is there to take time, to require sustained attention, and to be immune to autopilot. A task you are bad at while half-asleep is precisely the task that proves you are no longer half-asleep. If the mission were easy, it would not be a mission.

It also has a second effect that nobody designs for and everybody notices: the frustration wakes you up. Being handed 47 + 68 by a screaming phone is genuinely irritating, and irritation is a very effective stimulant. You do not fall back asleep angry.

How to set it up so it still works in week three

Almost every mission alarm fails the same way, and it is never the app’s fault. You install it, you set the difficulty to whatever felt reasonable at 11pm, and for four days it is a revelation. Then you adapt. Not consciously — you simply get better at doing the thing while barely awake, the same way you got better at ignoring your old alarm tone. Three rules keep it alive.

1. Set it harder than feels fair. The version of you choosing the difficulty is rested, comfortable and wrong about how capable the 6:40am version is. Medium, chained three times, is the floor.
2. Put the phone across the room anyway. Math plus distance beats math. The mission stops you dismissing on autopilot; the distance stops you completing it face-down in the pillow and rolling over.
3. Escalate when it stops hurting. The morning you notice you solved four problems and felt nothing is the morning to raise the difficulty or switch to another mission. Novelty is doing more of the work here than arithmetic is, and pretending otherwise gets people uninstalling in month two.

Alarmy has a math mission too, and it is a good one — you can push the difficulty higher than ours and it runs on Android, which we do not. The difference is what sits behind the mission. In Alarmy there is still, ultimately, a snooze button available. In Risly there is not one to find. If the mission is the lock, the snooze button is the key taped under the mat, and we did not tape a key under the mat.

Where math is the wrong mission

We would rather you pick the right one than pick ours out of loyalty.

• If you dismiss alarms without remembering it, math is not enough on its own. You are still in bed, and bed is where the problem lives. Use the camera scan and register something in the kitchen. Getting *out of the room* beats getting your brain online.
• If you have dyscalculia or any anxiety around numbers, do not do this to yourself at 6am. Shake or scan.
• If you have already learned to solve them in a fugue state — and people do, after a few months — escalate the difficulty or change mission type. Novelty is part of what makes any of this work.

And the honest limitation of the whole category: no peer-reviewed study has tested math alarms against ordinary alarms. Christopher Hilditch and Andrew McHill’s 2019 review in *Nature and Science of Sleep* looked at sleep-inertia countermeasures and found the evidence base thin for almost all of them, caffeine and light included. What we can defend is narrower and true: an alarm you must solve to silence takes longer to silence, and it cannot be silenced accidentally. The rest is between you and your morning.

The part that matters more than the math

A math mission is worthless if the alarm never rings. That is the real failure of most alarm apps: they are suppressed by Focus, or iOS kills them in the background, which is why their support pages ask you to disable silent mode and Do Not Disturb. Risly is built on AlarmKit (iOS 26+), so the alarm is scheduled by the system and fires like the Clock app’s — through silent mode, through Focus, even if you force-quit the app. The maths is the fun part. That is the part that makes it work. More on the anti-snooze page, and the full mission list on missions.