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Andrej Karpathy Blog

Finding the Best Sleep Tracker

trackersleep

The the words it uses that this site has seen least often elsewhere. Posts are matched on those words alone — nothing here is a summary of this one.

Sources

Top people

18 September

Nate SilverNewsletter

Cory DoctorowMastodon

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17 September

Rob HendersonNewsletter

11 September

Ben VinegarGitHub

9 September

Nassim Nicholas Talebx.com

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5 September

Dillon Mulroyx.com

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Karri Saarinenx.com

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4 September

Joe Previtex.com

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Tracy Choux.com

  • AnthropicRelated

3 September

Bryan JohnsonYouTube

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2 September

Iván Olivares Rojasx.com

  • AnthropicRelated

Joe Previtex.com
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1 September

Gergely OroszBluesky

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21 August

James Clearx.com

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18 August

Rob HendersonNewsletter

10 August

Joe Previtex.com
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Rasmus Anderssonx.com

  • LinuxRelated

1 August

Alexey GuzeyChanged their mind

  • Their words, before

    I claim that if you sleep as much as you want, you’ll probably sleep too much and become more susceptible to depression.

    Their words now

    while I still believe that the quality of the existing sleep science is extremely low, I advise against trying to decrease the amount of sleep you’re getting based on this article

30 July

Eric MeyerMastodon

  • Related

20 July

Tommy WoodKorrents

13 July

Josh BarroKorrents

11 July

Peter AttiaKorrents

From one piece Does losing sleep mean losing lifespan? 4 beliefs, in the piece's order there

+ 1 more
Fabien SanglardKorrents

24 June

Gretchen RubinKorrents

13 May

Anders HejlsbergKorrents

15 March

Shubham SinghRecommends

12 March

Mina MarkhamBluesky

  • Related

24 January

Jason LiuRecommends

  • Lovedaffiliate linkrcmnd.app

    Manta Sleep eye mask

    Their words

    For travel, Manta Sleep eye mask — they have hot and cold versions which I love.

    jxnl.co

21 January

Bryan JohnsonRecommends
  • Recommendsrcmnd.app

    Eight Sleep

    Their words

    Consider using a noise machine to offset environmental sounds or earplugs if necessary. Temperature controlled mattresses such as Eight Sleep are great.

    protocol.bryanjohnson.com

  • Recommendsrcmnd.app

    f.lux

    Their words

    Use red and amber lights in the evening . Bluelight is bad for sleep. You can get blue light blocking apps (f.lux), glasses and also turn red mode on your phone.

    protocol.bryanjohnson.com

9 December 2025

Rory SutherlandKorrents

21 November 2025

Tim FerrissRecommends

  • Lovedrcmnd.app

    Manukora

    Their words

    I love this smooth and creamy Mānuka honey, and I use it before bed to help with sleep.

    tim.blog

  • Usessponsoredrcmnd.app

    Eight Sleep Pod 5 Ultra

    Their words

    Several years ago, I started using the Pod Cover for cooling and heating while I sleep, and it has transformed my sleep quality.

    tim.blog

17 October 2025

Andrej KarpathyKorrents

16 October 2025

Anil SethPapers

8 September 2025

swyxSite

14 May 2025

Jeffrey PaulRecommends

24 March 2025

Andrej KarpathyRecommends
  • Recommendsrcmnd.app

    Whoop

    Their words

    Summarizing all of that into my advice right now: Get Whoop for 9.5/10, reliable, convenient sleep tracking with an excellent app (once you get to know it a bit). Get Oura for 10/10 tracking, if you're ok with the ring form factor.

    karpathy.bearblog.dev

  • Recommendsrcmnd.app

    Oura

    Their words

    Summarizing all of that into my advice right now: Get Whoop for 9.5/10, reliable, convenient sleep tracking with an excellent app (once you get to know it a bit). Get Oura for 10/10 tracking, if you're ok with the ring form factor.

    karpathy.bearblog.dev

  • Mixed onrcmnd.app

    8Sleep Pod 4 Ultra

    Their words

    I didn't find 8Sleep to be very reliable in its sleep tracking. The scores don't make as much sense to me when I wake up, and as we saw above they don't correlate very strongly with Whoop or Oura.

    karpathy.bearblog.dev

+ 1 more
  • Dislikedrcmnd.app

    AutoSleep

    Their words

    AutoSleep is basically a random number generator. Maybe there is a better app on Apple Watch for sleep tracking, but I haven't found it. Do not use.

    karpathy.bearblog.dev

6 March 2023

7 February 2023

Alexey GuzeyChanged their mind

5 January 2023

10 February 2022

Alexey GuzeyKorrents

1 March 2021

Mark MansonRecommends

  • Mixed onaffiliate linkrcmnd.app

    Why We Sleep

    Their words

    A flawed but really useful book. Some of the data here is exaggerated, it appears.

    markmanson.net

26 April 2020

Joe PreviteRecommends
  • Lovedrcmnd.app

    Keeping You Awake

    Their words

    Keeping You Awake is a fantastic app for preventing your mac from going to sleep.

    joeprevite.com

15 November 2019

Alexey GuzeyKorrents

10 April 2018

Sam AltmanRecommends

  • Mixed onrcmnd.app

    Chili Pad

    Their words

    I use a Chili Pad to be cold while I sleep if I can't get the room cold enough, which is great but loud (I set it up to have the cooler unit outside my room).

    blog.samaltman.com

18 December 2017

Bill GurleyBlog

  • “Customer First” Healthcare

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