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Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
140•theblazehen•2d ago•41 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
667•klaussilveira•14h ago•202 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
949•xnx•19h ago•551 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
122•matheusalmeida•2d ago•32 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
53•videotopia•4d ago•2 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
229•isitcontent•14h ago•25 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
16•kaonwarb•3d ago•19 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
222•dmpetrov•14h ago•117 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
26•jesperordrup•4h ago•16 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
330•vecti•16h ago•143 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
493•todsacerdoti•22h ago•243 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
381•ostacke•20h ago•95 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
359•aktau•20h ago•181 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
288•eljojo•17h ago•169 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
412•lstoll•20h ago•278 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
19•bikenaga•3d ago•4 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
63•kmm•5d ago•6 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
90•quibono•4d ago•21 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
256•i5heu•17h ago•196 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
32•romes•4d ago•3 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
43•helloplanets•4d ago•41 comments

Where did all the starships go?

https://www.datawrapper.de/blog/science-fiction-decline
12•speckx•3d ago•4 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
59•gfortaine•12h ago•25 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
33•gmays•9h ago•12 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1066•cdrnsf•23h ago•446 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
150•vmatsiiako•19h ago•67 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
149•SerCe•10h ago•138 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
287•surprisetalk•3d ago•43 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
182•limoce•3d ago•98 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
73•phreda4•13h ago•14 comments
Open in hackernews

15 Years of Building Jefit

https://www.jefit.com/our-story
59•jasong•6mo ago

Comments

piker•6mo ago
Would be good to hear more details about the journey from bootstrapped North Carolina house to a decent-sized team out west.

Is Jefit profitable now? Then?

What were revenues like during those times?

What's the software stack?

Interesting challenges (esp. from a tech perspective)?

xnx•6mo ago
Longtime Jefit user. I respect that it the enshittifiction (e.g. locking "volume" charts behind a subscription) has been slow enough to not force me to another product. I've definitely encountered many many bugs, but only a few that have resulted in partial data loss.

Lots of respect with allowing data export in a simple format like .csv

Did the "recent" exercise sort get removed?

jfengel•6mo ago
I've been using the free tier for a few years. I want very little out of it -- really just something to say "do these exercises today".

The basics work well enough. I'd just as soon they didn't lock alternative exercises behind the paywall -- if my gym doesn't have a leg extension machine, what's a good alternative? It doesn't seem a lot to ask.

I'm well aware that I get what I pay for on the free tier. But I worked around it by googling an alternative and just substituting that instead. It's good enough for my extremely meager purposes.

tallanvor•6mo ago
I've been using it for a long time as well, but I'm really tired of the constant up-sell attempts. I really just want a dead simple app to track my work, and I really feel like Jefit is moving further and further away from that.
placardloop•6mo ago
If you’re on iOS, the app “Strong” is a really simple but great tracking app. On Android there is “FitNotes” which is a little bit more barebones, but still really functional. I have tried Jefit a few times and think it’s great but ended up using these other ones because of their simplicity.
BlackjackCF•6mo ago
Hevy is another great and simple iOS workout tracking app in the same vein as Strong.
Cyphus•6mo ago
Heavyset on iOS should fit the bill perfectly. It has everything I want in a workout tracker (weights based on percentage of training max, workout calculator, Apple Health integration) and nothing more. https://www.runloop.com/heavyset
FredPret•6mo ago
If you're on iOS, consider this completely crazy idea:

Apple Numbers.

I started doing this with Excel, but the AN experience on mobile is great. You can even add simple forms.

warmwaffles•6mo ago
I stopped using the app around 2018 and went back to pencil and paper. Although I did like the diagrams on the movements to do, but once you learn them, you can't forget them. I never entered the data into a spreadsheet though, I didn't care about tracking gains. All I cared about was, what I was doing last week and where I am at this week.
Noumenon72•6mo ago
Misspelling in the title, not their fault
mproud•6mo ago
Anyone want to fix the typo in the title? Presumably “15 Years of Jefit”
cgsmith•6mo ago
or 15 Years of Buildling Jefit
q3k•6mo ago
Always appreciate seeing small teams go into bare metal hosting!

(judging by the photo of them in front of HE FMT2 colo racks)

throwanem•6mo ago
How many if je don't fit?
ge96•6mo ago
What if jefit?
Xmd5a•6mo ago
embrasse le concassage
oldpersonintx2•6mo ago
youtube is FLOODED with free fitness content, I mean, you could workout for five years and never see the same video twice

its all evergreen - crunches from five years ago are just as good today

everyone I know who worked as a personal trainer has moved out of the industry

endless free resources out there

and then the content connected to devices like Peloton etc

not sure how you can make a buck in this business

want to track your progress? look in the mirror or guesstimate

FredPret•6mo ago
Conversely, a tidal flood of free content, much of which is low quality, can motivate a consumer to shell out $$$ for something that's more curated, limited, and has a guaranteed lower limit on quality.

I know because I've done this many times in many contexts, with everything from fitness apps to programming courses to buying the latest fiction books. With all of these, there are multiple lifetimes' of free, good content out there, but good luck mining the nuggets out from the thick layer of slop.

maqp•6mo ago
Yup, I have no idea what's the point of gazillion YouTube shorts on exercises that have perfectly good tutorials by experienced people, available already.

E.g., https://www.youtube.com/@RenaissancePeriodization/playlists has ridiculously good per-body-part demonstration playlists if you scroll down a bit.

FredPret•6mo ago
You joke but this is exactly what I'm talking about.

This channel must have hundreds of hours of content, and I'm sure much of it is good, but I don't have hundreds of hours.

Instead, I will send hundreds of dollars to some trusted person to distill hundreds of hours into an app or something that I can use immediately.

maqp•6mo ago
No I did not joke. If you bother to open one of the playlists I referred to, you can find e.g. 10 rear delt exercises demonstrated in under 15 second videos with extremely good tldr advice.

https://www.youtube.com/watch?v=34gVHrkaiz0&list=PLyqKj7LwU2...

Mike Israetel who runs the channel is in the top-5 in scientific body building circles.

And you can get those same videos in their app https://rpstrength.com/pages/hypertrophy-app

Personally I'd use Jefit or Hevy over RP, but the point stands.

FredPret•6mo ago
Every point you make is fair but the point still stands: you had to find this stuff first.

And if I did not know about him and typed "rear delt exercise" into Youtube, there will be an endless amount of slop before I personally would run into this guy.

I'd gladly pay for this guy's app if I were in the market for a new workout plan. My point is that free content does not eliminate the market for paid content.

maqp•6mo ago
Jefit isn't about video tutorials, but keeping track of your progress in specific exercises, and performing correct amount of volume to progress but not over-train, a thing that becomes harder when you advance and your progress starts to slow down. At that point avoiding stagnation requires a lot more optimization and an app that can tell incremental progress in bench is more motivating than looking at the mirror and seeing very small changes. Also, for powerlifters the mirror is a poor tool since it's not about hypertrophy and body shape.
sergiotapia•6mo ago
> want to track your progress? look in the mirror or guesstimate

Do you lift? That's not a good way to track progress.

chihuahua•6mo ago
It would be interesting to hear more about why the move to Silicon Valley was necessary.

"My team in North Carolina didn't want to relocate. If I moved, I'd be starting from scratch, with no team"

I wonder what was the problem with the existing team working remote?

reactordev•6mo ago
This. The guy was sold a dream that only SV could make it. Totally not true. I’m sure the value of SV networking is great but what would that provide him? There’s plenty of opportunities he could have pursued in his home state. Raleigh-Durham has a very healthy investment culture.

I’m always skeptical of people who built something elsewhere then decided Silicon Valley is the only place they can grow. Sounds like someone said that to him and he just ran with it. With all the VC’s turning him down, he could have done that on the east coast just as effectively.

List of partners in his home state that could have been interested:

   Frontier Growth
   SJF Ventures
   Bessemer
   River Cities Capital Fund
   Wildwood

Having participated in countless Startup Weeks (Boulder being my favorite), there’s opportunity everywhere if you’re willing to put yourself out there.
antonymoose•6mo ago
Speaking from experience in SC, not NC, the terms just aren’t as good down here as could be had elsewhere. VC is somewhat a social game and moving to Silicon Valley does buy you a better market to play.
frankdenbow•6mo ago
Still a happy user of this app, thanks for sharing your journey. Especially love the Apple Watch app
jona777than•6mo ago
It's nice to get a glimpse behind the scenes of JEfit.

I used this app when I got serious about my fitness journey around 8 years ago. I fell off from using it 4 or 5 years ago (no fault of the app.) I can honestly say, it made it really easy to stay consistent with my workouts and show up to the gym confident in my programming.

Perhaps what I love best about this story, and similar startup stories, is the purity of building something to solve a problem personally. Then when the success of that thing happens as a side effect, it seems more appropriate. Stories like this take me back to the simple joy of creating something useful.

nemothekid•6mo ago
I've been using JeFit for ~6 years (I have a lifetime premium, I think, due to buying the app in full when you could). It used to be a pretty ugly app but I've stuck with it because it was the only app that did the simple function of creating a routine with a schedule then logging your performance over time.
brcmthrowaway•6mo ago
We need an examine.com for fitness. Too much slop out there.
cheezerman•6mo ago
https://exrx.net/
nullbyte808•6mo ago
Congrats! Weird how you lost half your customers during COVID when sales of home treadmills were exploding.