myCircadianClock 4+


Designed for iPhone

    • 2.1 • 209 Ratings
    • Free

iPhone Screenshots


This app is for use in research studies examining how diet, exercise and sleep affect health and healing. Our body contains circadian (circa – approximately and dian – day) or 24 h clocks that determines the time to sleep, feel hungry or get ready for physical activity. Research studies run in different locations are trying to understand the interaction between “how much” and “when” we sleep, eat or exercise for better health. You need an activation code from these research studies to download and use the app.

Following are the key features:

- Camera function to snap picture of everything you eat or drink
- Sleep tab to record time to bed and time of waking up
- Exercise tab to log physical activity
- Personalized food menu
- Health tab to log and monitor health parameters
- Medication reminders
- Feedback with the research coordinator
- Integrated healthkit framework to track your health information.

What’s New

Version 5.5.7

Fixed notification and tips issue.

Ratings and Reviews

2.1 out of 5
209 Ratings

209 Ratings

Lja3930 ,


This app is very primitive. Even the how to videos sound like a kid just talking into a recorder and the pics are so small. I used the app for 10 days and then it just stopped working. It was a lot of effort to log food and sleep. Also, the picture taking and food logging just seems so antiquated. There are so many apps already that can log things like food, sleep and water intake, there is no need to try and reinvent the wheel. If you need good data collection, see what is already out there and team up with a company that already has the ability to track this type of information and already has millions of users.

MintalFlo ,

Has Potential

I struggle to use this app. It's very slow and often freezes not allowing the camera feature or other logging features to work. Its slowness doesn't allow me to log my food in the moment. Overall taking pictures of my food has been the challenge because of the app crashing or not having an easy way to open the camera feature which works unreliably. More recently since the recent update, the app only allows me to log my food without taking a picture. After I save my food or beverage, the camera activates and I take a picture of my food that I just logged but it is not clear to me if the app is double logging my food or not or if this is the new way to log food in the recently updated app! Very frustrating. I will continue to use the app because I believe there is value in this study. I am a firm believer in healthy lifestyle choices and aim to fine tune my efforts to fast by using the feedback (although not accurate) logged here. I already eat quite healthy. I just want a record of my habits in one app. I know it's not 100% accurate, but for my needs at this time, this app seems to be the best choice. I hope the developers continue to improve the app. It has so much potential.

OneHappyMeditator ,

App too slow and buggy to keep using

I was so excited to participate in the research, but after completing the two week baseline I discovered that much of my data was not recorded. Only five or so foods are able to be annotated with a single entry, so much of my data were lost because it took me a week to realize I had to do a new entry just to log an entire meal. Additionally, there were no instructions stating that you couldn’t log food, beverages and meds with a single entry. So if I went sequentially through the tabs, the only thing recorded was the medication; all the food and beverages I annotated were lost. The vast majority of photos I took are not in the history. I wanted so badly to participate in this because it sounded fun and I’m doing time restricted feeding because of Dr. Panda’s research findings. If the technical kinks get worked out, I would be happy to begin again, but right now the data collected for me will just demonstrate a glitchy app and not a picture of my dedication to fully participating.

App Privacy

The developer, THE SALK INSTITUTE FOR BIOLOGICAL STUDIES, SAN DIEGO, CALIFORNIA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Health & Fitness
  • Location

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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