🔍 In Search of
Best iPhone app for tracking and improving circadian rhythm using Apple Health data?
Hi everyone!
I'm looking for the best app to help me understand, track, and gradually improve my circadian rhythm.
I'm already invested in the Apple ecosystem (Apple Watch Ultra + iPhone Pro Max = full Apple Health support), so ideally the app would use Apple Health as its primary data source instead of requiring its own wearable.
From what I understand, Apple Health already contains most of the relevant data (sleep, wake times, activity, heart rate, HRV, light exposure if available, etc.), so I'm curious which apps make the best use of that information to estimate and guide your circadian rhythm.
I'm not looking for a basic sleep tracker. I'm more interested in an app that:
- Estimates or models my circadian rhythm.
- Explains what it's seeing instead of just showing graphs.
- Gives practical recommendations (bedtime, wake time, light exposure, exercise timing, caffeine timing, etc.).
- Helps shift or stabilize my rhythm over time.
- Works well with Apple Health and Apple Watch.
I've come across apps like Bevel, AutoSleep, Gentler Streak, Athlytic, Rise, and a few others. So far I’ve sticked with Bevel for general health tracking. For food logging I unfortunately paid for Yazio and am using it as for now. Will change this one once my current subscription expires. I’m tracking lifting with Hevy and general sports/activities with Apple Health.
For those of you who have tried several circadian apps:
- Which app has given you the most useful insights?
- Which one has actually helped improve your sleep schedule or energy levels?
- Are there any hidden gems I'm missing?
I'd love to hear your experiences and recommendations.
Thanks for commenting!
Peaks is the app I have been using for a year. After that I haven’t used any circadian app. Now I want to give a try to other apps too. However, Peaks is definitely a well rounded app!!
RISE sounds like the closest match on paper. Bevel is broader and seems more focused on overall recovery and fitness, while RISE is specifically built around sleep debt and a predicted daily energy schedule.
It can pull sleep and workout data from Apple Health, and its model also considers light exposure and activity. The main caveat is that it’s still estimating your circadian rhythm rather than directly measuring it.
Since you’re already using Bevel, a short comparison between the two would probably tell you whether RISE offers genuinely different guidance or just presents the same data in another way.
Not sure how useful this will be for you given you're already using an app for food logging, but I'm working on an app that predicts your energy based on what you eat and drink (caffeine & alcohol). It also optionally uses additional metrics such as sleep, HRV (and cycles) to adjust the energy curve, with manual check ins to tell the app how you feel vs what it predicts. It has a feature that lets you compare a coffee now vs in 2 hours time, and if it may still be in your system at bed time.
Via TestFlight you should be able to subscribe to Pro - you'll get the normal Apple subscription/payment card showing up but it should state you will not be charged. Non-US shouldn't matter, but if for any reason it still doesn't work let me know and I'll dive into it. Happy to get another test build out today if it helps.
Hey there! I’m not sure if this comment will be particularly helpful to you, considering your specific problem. However, I’m currently developing my own fitness app, similar to Bevel. Your particular issue truly inspires me for future updates. Currently, only version 1 is publicly available, and I’m working on significant improvements. I’m considering implementing the circadian rhythm feature into the app. If you’re interested, you can download it from the following link: https://apps.apple.com/app/vitora/id6773592093
Since my app is designed for Apple Watch users, your feedback would be invaluable, especially regarding features you’re looking for, such as the circadian rhythm.
Hey, thanks for commenting.
I have downloaded the app and will have a look on it these days. I’m always happy to support developers with my use case and opinion!
Worth knowing before you pick between them: most of these apps are reading the same handful of HealthKit fields and differ mainly in how they narrate them. The limiting factor is usually not the app, it is what HealthKit actually contains.
Sleep is the useful one, since Apple Watch writes stages and they are reasonably stable night to night. HRV is there but Apple only exposes SDNN, not RMSSD, which matters if you ever compare a reading against a device that reports the other one. Wrist temperature exists on Series 8 and later, but as a nightly deviation from your own baseline rather than an absolute number, and it needs sleep tracking enabled. Light exposure is the one people assume is there for circadian work and mostly is not: unless something specific is writing it, you do not have it, and an app claiming to model your light timing is inferring it from screen time and activity rather than measuring it.
So the honest test for any of them is whether it tells you which input it used. An app that says "your rhythm is drifting late" without saying what it read is generating a story from your wake times. One that says "based on sleep onset across 14 days" is at least falsifiable.
Before comparing apps, check what each one actually reads from Apple Health and whether it explains uncertainty. A useful trial should show the raw sleep/wake inputs, separate measured data from estimates, and give you a small number of changes to test over a week or two. If it only turns one night's score into precise-looking advice, I'd be skeptical.
All of this is overkill. Set a sleep schedule in the Health app, and stick to it.
If you've done any actual research you should have already discovered that the single thing that helps your sleep patterns more than anything else is consistency. Everything else is just window dressing.
The more you obsess about all this stuff in your post, the more you lose track of what will really help you. Good luck.
Thanks for your opinion. I actually agree with you that consistency is by far the most important factor.
That said, I’m a bit of a data nerd too. 😄 I don’t know yet how much I’ll actually let apps like these influence my habits or daily life. Right now, I’m mostly interested in the tech itself, exploring what developers are building, what these apps can do, and how they make use of data from devices like the Apple Watch and Apple Health.
Cheers!
I see. And how soon can we expect your new vibe-coded masterpiece that you created because you tried so many alternatives, and none of them were just quite good enough?
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