allenleein

I'm working on an iOS app that unlocks the hidden sensors in your AirPods, turning them into a real-time AI posture coach for work and workouts on iOS and macOS.

Download: https://www.airposture.pro

Really appreciate you saying that! Out of curiosity, what’s been the most helpful part for you so far?

Thank you :)!

AirPosture: Turn your AirPods into a smart posture coach

An iOS app that uses your AirPods' sensors to catch bad posture in real time.

How it works:

Real-time tilt tracking – Your AirPods already have the tech Customizable alerts – Adjust sensitivity so it nudges you only when needed Prevent strain before it starts – Stop neck pain and headaches at the source

https://www.airposture.pro/ (TestFlighting)

Has anyone explored a different angle — like mapping out the 1,000 most frequently mentioned or cited books (across HN, Substack, Twitter, etc.), then turning their raw content into clean, structured data optimized for LLMs? Imagine curating these into thematic shelves — say, “Bill Gates’ Bookshelf” or “HN Canon” — and building an indie portal where anyone can semantically search across these high-signal texts. Kind of like an AI-searchable personal library of the internet’s favorite books.

Great article, highly recommended: https://blog.sshh.io/p/how-cursor-ai-ide-works

(no paywall)

Thank you! let me know if you wanna join the beta (forever free).

[email protected]

AirPosture: Turn your AirPods into a posture coach on macOS

A macOS app that uses your AirPods' sensors to catch bad posture in real time.

How it works:

Real-time tilt tracking – Your AirPods already have the tech Customizable alerts – Adjust sensitivity so it nudges you only when needed Prevent strain before it starts – Stop neck pain and headaches at the source

Demo:

https://youtu.be/UEOla3WBy1g

It seems OpenAI acquired Windsurf but is letting it operate independently, keeping its own brand and developing its own coding models. That way, if Windsurf runs into technical problems, the backlash lands on Windsurf—not OpenAI. It’s a smart way to innovate while keeping the main brand safe.

3D Drone Wargame.

(https://horus.sh)

I'm developing a wargame-like 3D simulator designed to train AI drones into elite stealth pilots. By integrating reinforcement learning techniques and utilizing real-life local landscape data, the simulator offers highly realistic mission scenarios.

On-device LLMs/AI

Product-market fit is a spectrum, as opposed to something you definitely have or don’t

- Every business is unique, and metrics frameworks apply differently. Focus on the metrics that matter for your product, and make sure they’re clearly defined

- Product Market Fit (PMF) can rise and fall as the product and market change and grow. It’s not this static thing that once you get it, you always have it.

B2B

Every enterprise company should run a 30-day proof of concept trial. To make these trials productive, company usually requires the customer to agree to buy the product after 30 days if it meets expectations. But… pull the trial after 30 days (no matter what). Then:

“If the customer doesn’t scream, you don’t have product-market fit because if they’re not going to buy it at the end of 30 days, they’re not desperate, and if they’re not desperate, you don’t have product-market fit.”

“The second biggest mistake I see entrepreneurs make, especially in enterprise, is when they pitch a potential customer on an idea, and when the customer doesn’t like the idea, they try to iterate on the product to build something the customer would want.”

“That’s the absolutely wrong thing to do, even though it feels right. You want to find people who love what you’re doing, not try to convince the ‘no’s’ and turn them into ‘yes’s.'”

B2C

“The only way you know if you have product-market fit is if you get word of mouth” (and the best test of word of mouth is exponential, organic growth)

Benchmark: Users scream for the product so you can screw everything up and still win (for a period of time).

Identify the next WhatsApp, Instagram, or Snowflake when they are still a 10-person team, and join or invest in them.

Related (Chinese)

https://mp.weixin.qq.com/s/_cs2M2Nm1HamkRfEY2F1xg