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Life changing
From LennyLenny Rachitsky @lennysan

“What's a product under $250 that has genuinely improved your life?”

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Most recommended

Top 8 of 164 things, 1004 people recommended

Overall #5
Under$5090peopleswear by it

Manta sleep mask

  • Sleep better
  • Travel easier

Simple but has made falling asleep at home or traveling...

Jarrod Tran, X
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How we rank

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Save time

28 things, 499 people recommended

Under$5011peopleswear by it

Vitaclay slow cooker. Massively elevates slow cooking...

Arun, X
More for save timeSee all 34

Focus

13 things, 420 people recommended

More for focusSee all 17

Save money

13 things, 409 people recommended

More for save moneySee all 17

Sleep better

16 things, 409 people recommended

More for sleep betterSee all 20

Eat better

9 things, 374 people recommended

More for eat betterSee all 17

Move more

15 things, 350 people recommended

More for move moreSee all 20

Less pain

18 things, 237 people recommended

More for less painSee all 19

Build habits

9 things, 203 people recommended

More for build habitsSee all 11

Track health

6 things, 112 people recommended

#1 in Track health
Under$25030peopleswear by it

Apple watch se 3

  • Track health
  • Move more

Apple Watch. Changed the way I view and measure my...

Dean 🏴󠁧󠁢󠁥󠁮󠁧󠁿, X
Buy on Amazon
New!
Over$25018peopleswear by it

Expensive, but highly recommended

Oura ring 4

  • Track health
  • Sleep better

Oura ring. Helped me prioritise and improve quality...

HLC100, X
Buy on Amazon
More for track healthSee all 6

Travel easier

13 things, 103 people recommended

#1 in Travel easier
Under$10033peopleswear by it

Anker power bank

  • Travel easier

Anker USB C Power Bank, PowerCore Essential 20000 PD...

JitteryBendal, Reddit
Buy on Amazon
Under$5018peopleswear by it

Apple airtag

  • Travel easier
  • Save time

My AirTag. It has saved me on three separate trips and...

SeveralMarionberry, Reddit
Buy on Amazon
More for travel easierSee all 18

Drink more water

5 things, 102 people recommended

Under$25011peopleswear by it

Newair nugget ice maker

  • Drink more water

It's going to sound silly, but a desktop ice maker...

THE Yeti Moose, X
More for drink more waterSee all 5

Stay warm

4 things, 45 people recommended

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Get organized

3 things, 15 people recommended

More for get organizedSee all 7

Feel calmer

4 things, 7 people recommended

More for feel calmerSee all 12

Better skin

5 things, 0 people recommended

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Dress better

3 things, 0 people recommended

More for dress betterSee all 5
Under $250people swear by it

Price
Under $50

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    Qingping co2 monitor

    Shows when a room's air goes stale, so you know when to open a window.

    Buy on Amazon

    What 6 people say

    1. CO2 sensors for every room in my apartment. Before monitoring the CO2 levels I did not realize the relation of tiredness, mental fatigue and high CO2 levels.

      snmx999Hacker News, Jan 6, 2023See post

    2. I love the SwitchBot one. I have it connected to the bot (the device that can press the button) so it can control my air-conditioner either by temperature or by CO2 PPM count. Literal game changer for brain fog and sleep quality.

      Charlie @Charlie_leahy_X, Oct 27, 2026See post

    3. Qingping Air Monitor Lite: https://a.co/d/1jUkawZ - AirGradient DIY: https://www.airgradient.com/ They helped determine why everyone feels so sleepy and groggy at home in the winter: the CO2 levels are routinely over 2,000 ppm.

      runjakeHacker News, Jan 8, 2025See post

    4. CO2 Monitor to let me know when I need to let some new air into my office.

      cehrlichHacker News, Dec 9, 2023See post

    5. CO2 meter - small appartment, both of us working from home since COVID, windows shut at all times because of air quality / heating, found out we were living at very high average CO2 levels, instant fix for weird mental fatigue opening the windows whenever the levels are too high.

      FiReaNG3LHacker News, Dec 6, 2022See post

    6. Im also pretty happy with my Plumelabs Flow, a small device that constantly measures air pollution. We used it to find a new and better home

      richxHacker News, May 20, 2021See post

    Em’s logs

    My Telegram announcements channel for quick musings and observations. Life, tech, AI, marketing.

    As an Amazon Associate I earn from qualifying purchases. Other links may earn a commission too.

    It never decides what gets listed or the order. Every pick comes from a real post on X, Reddit and Hacker News, and every quote links back to it. Methodology