iPhone Screenshots


Sleep Ninja is only accessible to people taking part in a study conducted by The Black Dog Institute. The app draws on existing research to teach people strategies to improve their sleep. For more information please contact sleep@blackdog.org.au

What’s New

Version 3.0.8

Bug fixes and improvements

Ratings and Reviews

1.0 out of 5
2 Ratings

2 Ratings

FluffySnake3105 ,

Error Message: User not Found

I am signed up for the study, but when I try to sign in it says “user not found” I tried to sign up again, but when I do it tells me that my phone number has already been registered.

I was really looking forward to participating in this study, but if I can’t sign in then I can’t use the app.

I will be trying to sign in everyday (this is my second day of attempting to sign in) and I hope it is going to get fixed/resolve itself.

Once again I was really looking forward to participating in this study and am extremely disappointed that I am unable to sign in. I know it may be out of your control, but I would like to know what is happening/what I can do to correct this.

I wish you the best of luck with this study, and will be adding an additional review if the problem is resolved.

Alice, 14

stellvictoria ,

user not found

I am signed up for the study and have completed months worth of surveys to get the app and now when i put in my number it says “user not found”. A bit disappointing

Warning WARNING warning ,

No sign up

When I first opened the app it asked for a login that I do not have yet and I can see no way for me sign up :( Please help.

Developer Response ,

Thanks for your interest in the Sleep Ninja app. This app is still in testing phase and is only available to those who have registered to take part in our pilot study. More information is available at http://bit.ly/2soLYKo. You can also email sleep@blackdog.org.au to find out more or to be kept updated on when the app will be publicly available.

App Privacy

The developer, Black Dog Institute, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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