u/SpicyStrippa

Hi everyone! I’m Dayah. Some of you may know me as the person behind Circadia, a sleep app I originally created for my own N24.

Circadia already exists on the web, and a surprisingly large part of its community now has DSPD and other sleep disorders, *not * N24. Due to that, I’ve been building different, disorder-specific versions of Circadia instead of expecting everyone to use tools designed around my own condition.

Those versions aren’t live yet. Finishing them is the last thing holding up the native iOS launch, which I’m preparing for this upcoming week!

DSPD is by far the most important one for me to get right. Not only because so many existing Circadia users have it, but because I don’t want to guess from outside the disorder about what would actually improve your lives.

So *please* give me your most selfish, oddly specific feature requests.

What would make you open an app and think, “Holy shit, somebody finally understands DSPD”?

The unreleased DSPD-specific version already includes:

- Your likely sleep and wake window, based on your own history
- Drift Watch, which looks at whether your late timing is staying fairly steady or moving (since DSPD often precedes N24)
- Sleep-onset trends and recent directional movement
- Free days versus work, school, alarm, or obligation days
- The actual cost of forced wakes compared with natural wakes
- A “morning runway” showing how long it tends to take you to feel functional
- Warnings when a saved morning commitment overlaps your usual sleep
- Comparisons between your own tags (caffeine, light, activities, medication changes, migraines etc) and how they affect your sleep

The wider Circadia app already has detailed sleep logging, prediction tools that use traditional machine learning, imports and exports, calendar and pattern views, doctor-friendly reports, optional sharing with trusted people, a crazy amount of analysis, and a community view showing who else is awake. The iOS app also connects with Apple Health.

I’m currently working on adding a much deeper DSPD overhaul for launch, including:

- A home screen centered on whether tomorrow morning collides with your real sleep window
- Your unconstrained baseline from days when nothing forces you awake
- How much sleep early obligations cost you, measured against your own baseline (not a universal “ideal” bedtime though Circadia doesn’t do that already)
- A proper onset trail and work/free-day comparison
- A history of Drift Watch’s steady-versus-moving reads
- Quick morning-function check-ins
- A wind-down anchor learned from your own timing
- A way to check how badly a recurring commitment would collide with your sleep before accepting it

What am I still missing?

What do existing sleep apps get completely wrong about DSPD? What would make logging feel worth the effort? What would help with work, school, appointments, accommodations, doctors, relationships, or simply planning a life around your actual clock?

And once I’ve finished added the features people request, would anyone here be willing to test the finished DSPD-specific version and give me brutally honest feedback?

Don’t worry about being nice. Tell me what sounds useful, useless, confusing, or completely disconnected from real life. Even one wildly specific wish would help. I just need something to go off of. I never started with DSPD, I’ve had N24 since I was an infant so I have literally no useful knowledge other than this subreddit and a ton of research.

I’ve been working on the DSPD lens for weeks, but I’m at the point where I just need feedback from actual people with the disorder. Circadia is only good because *I* have N24 and made it for myself.

I do get a lot of my feedback from users, but haven’t heard as much from the DSPD ones, though they *do* use Circadia every day. I’m just too much of a perfectionist to ship something that sucks, and I’m really in my head about this. Please help 🥺

I have N24. Typically, my drift is 4-5 hours and my average sleep is around 5hrs. When I get sick though, I usually sleep considerably longer and drift less (around 2 hours). Once I start overcoming it, my sleep goes insane. +9hrs, +15, +12, +7, not a pattern in sight. The week before this one was even wilder.

I’m grateful to sleep more when I’m sick, but not at the cost of the rebound that happens for next couple weeks. It throws me off so much 😭 But I usually have long awake periods 50-70hrs at least once a week, so it’s been cool sleeping every day, although it doesn’t really feel like I did.

Anybody else miserable and horrible at sleeping like me?

I have N24 and got tired of apps that don’t understand how we sleep, so I built one.

Nothing on the market actually handles drift. They assume one consolidated sleep per day, they don’t know what to do with sleepless nights, and they definitely don’t know what to do with us. So I built something that does.

It’s called Circadia and the alpha is live at circadia.owlandkestrel.com. Core features are free and will stay that way, including tracking, drift math, exports, and the doctor’s report.

What it does:

🛏️ Logging — Sleep onset/wake/duration/quality, wake type (natural vs forced, because the math accounts for alarm-forced onsets), stress/illness/medication flags, post-wake mood + cognition check-ins, sleepless-night logging, and auto-detected crash naps with manual override.

📊 The math — Daily drift, variability (steady drift vs chaotic), estimated tau, live sleep pressure updated by the minute, and 14-day sleep debt in plain English (“you’re 38 hours short this fortnight, that’s severe”). Tunable for polyphasic, ME-CFS, and split sleep.

🔮 Predict — Upcoming sleep window forecasts plus an event predictor: type any date/time and see what biological time it lands at, with a confidence score based on your personal sigma.

📅 Chart + Calendar — Interactive drift chart, symptom overlays, mood/cognition trends, and a calendar view with predictions.

📄 Doctor’s report PDF — Multi-page clinical summary with your chart, stats, and recent log. Pick your disorder (N24, DSPS, ASPS, ISWRD, shift work, or general CRSWDs) and it renders the correct ICD-10 code, diagnostic criteria, treatment options, and an honest entrainment-limits caveat with real response rates and references. Built specifically so you can hand it to a sleep doctor who has never heard of N24 and have them actually have something to work with.

📤 Import/export — Import from Sleep As Android, Fitbit, or a Circadia backup. Export as JSON, text log, PDF, or SVG chart anytime.

Coming soon:
• 📱 Native iOS + Android (TestFlight beta in ~1-2 weeks, comment if you want in)
• ⏰ Smart alarms + push notifications
• 🩺 HealthKit / Google Fit / Fitbit / Oura import
• 🤝 Partner/caregiver sharing
• ☀️ Light exposure + medication logging for entrainment attempts
• 📅 Calendar integration so your biological night shows up as an actual blocked event (with zoom integration as well)
• 🧠 Mood/cognition correlation with sleep quality + drift
• 💊 Phase-response-curve modeler to predict whether melatonin at time X helps or hurts
• 🌀 Polyphasic-aware predictions (known limitation right now; you can manually exclude entries to keep your data clean in the meantime)

A couple of asks:
- I’m capping the alpha at 100 users so I can actually keep up with feedback.
- If you do sign up, *please* consider toggling on “share my data with the developer” in your account menu. Anonymized, opt-in, revocable anytime. There’s almost no public data on N24 patterns anywhere, and drift prediction gets meaningfully better with real data behind it.

And please tell me if you find bugs. This is my first app and I’m still learning. 💜 I’m actively working on it in the alpha stage, so expect it to change occasionally (your data will stay safe!).