https://opengraph.githubassets.com/3f485d6c65f61fa587b2d9b6bd6f110db71340239f3f67052e44cb9f97325143/ankidroid/Anki-Android/issues/21656
The AnkiDroid app, a free and open-source flashcard app for Android, has been rejected by Google Play Store due to violating the Payments policy. The issue is that the app allows users to contribute donations to an organization that is not tax-exempt. To resolve this issue, the developers must remove any links directing users to make payments using systems other than Google Play's billing ...

Ask HN: Who is hiring? (September 2026)

I'll post job openings for remote work with the company's name, location, and a brief description of their business.

Urban Congestion Pricing and the Response Times of Emergency Medical Services

https://www.nber.org/sites/default/files/styles/promo/public/2026-07/2026%20Martin%20Feldstein.png?itok=1jwXEODI
Researchers studied the impact of New York City's congestion pricing program on emergency medical services response times, finding a 5-6% reduction in total travel time. The improvements were largely due to changes in traffic patterns near the zone boundary, with passenger vehicle and truck density decreasing while pedestrian and bicycle density increased.

Io_uring Without Readahead

https://frn.sh/iouring/q6-sqpoll-all.svg
The author implemented readahead in Turso, a database backend, to measure its impact on io_uring and understand why it's faster. The results show that with readahead enabled, the application submits more SQEs but fewer requests arrive at the device due to kernel merging of concurrent requests.

44% on ARC-AGI-1 in 67 cents

https://mvakde.github.io/blog/hero-img.png
The author trained a small transformer from scratch in 1.5 hours, achieving scores comparable to large language models (LLMs) on the ARC-AGI benchmark, with costs reduced by 10x and no need for synthetic data or augmentations.

American Airlines' Legendary Mechanic Passes Away at 100 After 80-Year Career

https://static0.simpleflyingimages.com/wordpress/wp-content/uploads/2026/07/shutterstock_2719557287_cropped.jpg?&fit=crop&w=1600&h=900
Azriel "Al" Blackman, a 100-year-old American Airlines mechanic, passed away after an 80-year career with the airline. He holds the Guinness World Record for the longest career as an airline mechanic and inspired generations of aircraft maintenance technicians.

Fastpotify

https://fastpotify.rocks/screenshot.png
Winamp is a native binary music player that starts quickly and uses little memory, allowing local playback and control on various devices. It features browsing playlists, search, keyboard shortcuts, and customizable skins for a period-accurate experience.

Saab Enters Collaborative Combat Aircraft Race with High-End Concept

https://aviationweek.com/sites/default/files/styles/crop_freeform/public/inline-images/SAABCCA_2-Tony_Osborne-AWST.jpg?itok=Y8GbbDL2
Saab has unveiled its A3 collaborative combat aircraft concept, a supersonic, autonomous air vehicle that could be developed in the early 2030s to complement its Gripen E. The A3 is designed to operate in controlled airspace and feature advanced sensors and electronic warfare systems.

Fractal Jittered Voronoi Partitions

https://www.boristhebrave.com/wp-content/uploads/2026/08/fractal_voronoi-997x1024.png
A "jittered" Voronoi variant is a fractal boundary generator that partitions the plane into cells, similar to coastlines. It's computed by recursively halving a grid and finding nearest sites in each layer until an early stopping condition is met or a fixed depth is reached.

Introducing Ad Blocker for Firefox on iOS

https://blog.mozilla.org/wp-content/blogs.dir/278/files/2026/08/iOS-AdBlocker-1-1000x563.png
Ad Blocker for Firefox on iOS blocks third-party ads and trackers, reducing clutter and distractions while browsing. It's an optional feature that works alongside existing privacy protections in the browser.

Tmp.0ut Volume 5

The output is a table of Linux ELF files with various properties and functionalities, including malware examples and security topics. The table lists 20 different ELF files with their respective authors and descriptions.

Restroom Archive

https://restroomarchive.com/metatag.jpg
A public restroom at the Tri Cities Regional Airport's basement level is accessible despite its disrepair. The remaining structure consists of old pipes, a sink, and windows leading to street level or a dark crawl space.

GPU World

https://www.gpuworld.org/open-graph/1200-630.png?v=nzjqee
The AI revolution will transform humanity with access to frontier LLMs, potentially leading to significant changes in education, healthcare and social media. In a "business as usual" future by 2040, widespread access to high-quality AIs could lead to various benefits and challenges.

EFF to Governor Newsom: Veto California's AB 1709

https://www.eff.org/files/banner_library/ageverificationbanner-3.png
California's AB 1709 bans social media use for under-16s, restricting essential features and harming vulnerable youth. The law risks privacy violations, free speech limits, and legal conflicts, urging Governor Newsom to veto it.

Playa Phone

https://playaphone.com/images/booth.3c995833ab2c.jpg
A phone booth is available at Burning Man for free calls to anywhere in the world. Dial +1 (775) 557-4848 to connect with a random Burner or add it as a contact later.

I turned my security cameras into an automatic bird identification system

https://jasontucker.blog/content/images/size/w2400/2026/06/birdnet-2.jpeg
The user set up BirdNet-Go, a bird identification system that uses AI models to analyze audio from security cameras' microphones, identifying birds and other wildlife in real-time. This setup has become a fun game for the user and their wife, providing insights into local biodiversity and even connecting with other birders through a community platform.

DIY – Build a Potato Box (2022)

https://www.rebootedmom.com/wp-content/uploads/2020/03/Potato-Planter-8.jpg
Build a potato grow box using 2x4s and wood screws to create a space-efficient garden that yields up to 100 pounds of potatoes in just four square feet. Plant seed potatoes in layers, adding more boards and dirt as the vines grow, and harvest them by removing the bottom boards in early fall.

We Are Rebuilding Monica

https://www.monicahq.com/og/monica-en.png
The author is rebuilding Monica, an open-source personal CRM, after ten years to better represent relationships and user needs. They aim to create a flexible system that respects privacy while allowing customization.

Terence Tao explains 6 essential mathematical concepts [video]

RotaryCell: Making an unmodified rotary phone work over LTE with an ESP32-S3

https://raw.githubusercontent.com/fregacmols/RotaryCell/main/docs/images/rotarycell-prototype.jpg
RotaryCell converts a traditional rotary phone into a portable, battery-powered cellular phone without modifying the original. The project uses existing telephone parts and adds electronics to create a working prototype that can be carried away from fixed connections.

CollectWise (YC F24) Is Hiring

https://bookface-images.s3.us-west-2.amazonaws.com/logos/a5be02a3378f664e1f80f2a84997514d00f9fc1f.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAQC4NIECAPAPCUTAH%2F20260901%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20260901T072238Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEN%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLXdlc3QtMiJGMEQCIAkSwq1VkUK5GmO%2Fk3oUIUqukSkZTx%2BmKCjbRmQSnZc%2FAiBigcxyt2EAbjyz0LBNMWUmAW1QNTI%2FvRxRmx5sAEc%2FJCruAwio%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAAaDDAwNjIwMTgxMTA3MiIM1PTAEKydbF418rxlKsID9%2FeeDKxhsFv2f9qUyw6kwNpwis3yJESRRInJkKccGmaPcnBwG8UIW%2FUORp0%2FA%2FufSCwAm5YSQBTpiLEqn9g6TXRtByb3ruTvYfen%2F3FDAYtZMtMVralAc7QOaM1kfutlQkvFPya9mCYuEHgImf0RfBg6DUWDwnA%2FwuoFdlWubp0eUM5LGjGBwN9dfXlyqLjTJEOo5RT8IaidveAe6XICToodnrm6wIZ3Hio0seIimeoTzKI0D8Zid9dnt12ZEKfCc8S2oNfUbOyS2rIcGNBAy88PCDHqrN5HUteFqNVjpxebLhL%2F%2Bs6rplITBMhB4PdGXMVSJZclVpUnayOk28b9JMAwY%2FYrMD5OTRNiE0XR94NaIKRWWPaNvtEn6IZGl%2BxY8ywbNASdVje%2BxnUBcIclUWj12NvX2%2BSSkomaJf3Y382bGjtPnnsG9I%2BdYHFwY%2FLy%2FTCt9EwQK796jZmMKhQchM8Bp3tyc976RcPNTla0jhfZ9wmWU4iTskxNUFLtrOO%2FsDTDTNfWiaYAp%2BgbA5RbjbYrEkceAGkyHaees9s%2FV1j5XibD2hlLgRDCFF2cHDm%2ByXwxCUrbNq5XaYeDsKDImpPsMNH32dQGOqYBcnj05pz4epL%2BDGccvK4gRRNeV3fR42RvMpO9TcHD38PKlN%2F8XMgEY66SawoVaVn4J2N12tFZ7x9wsmskNfQ6knSjffs7LmlO3EVVjGPU%2FNgISMVsL3l2rrtuiOKTeN32v5YjLkOqaWY3oRZR%2F1t6R4F6l%2BygldZ9YzJH3SLbl2rXKKQYiBpidD054rvtUeu4m1MRYOHtRWCBDu%2B1DwXgCFB0HEVNYg%3D%3D&X-Amz-SignedHeaders=host&X-Amz-Signature=d4ddc2ae0cc77d820cda5e0c254eb109ed43e21641c2505d1b07c2bea047dea6
CollectWise is a Y Combinator-backed startup using AI to automate debt collection, hiring a Founding Customer Success Engineer to ensure customer success and expansion. The role involves managing customer relationships, troubleshooting technical issues, and optimizing AI agents for $150k-$180k OTE with equity options.

A walkable ASCII cyberpunk city in one HTML file [video]

Dwarf Fortress is getting the mother of all magic updates

https://assetsio.gnwcdn.com/Dwarf-Fortress_l6U4yxY.jpg?width=690&quality=85&format=jpg&dpr=3&auto=webp
Dwarf Fortress is getting a major update with procedural magic systems, allowing for unique and unpredictable magical situations. The update promises to revolutionize the game's existing magic system, enabling discovery-based research and exploration of new forms of sorcery.

Ubisoft's FOR HONOR will block SteamOS / Linux players starting September 10

https://uploads.golmedia.net/uploads/articles/article_media/9551386521788252904gol2.webp
Ubisoft is blocking Linux support for For Honor on September 10th, citing anti-cheat issues. This move adds to a list of games excluding Linux, highlighting ongoing challenges for the platform.

Apple caught off guard by AI demand for Mac Mini and Mac Studio

https://images.macrumors.com/t/u267Ev00q3mfyErEf22YvEgCV6o=/400x0/article-new/2026/04/Mac-mini-vs-Studio-Feature-Sans-Text-1.jpg?lossy
Apple unexpectedly released new Mac mini and Mac Studio models due to strong enterprise demand for AI hardware, driven by a boom in AI-driven sales. The early launch coincides with the global memory shortage, leaving many configurations out of stock.

Cheap GPS jammers are filling the world with navigation dead zones

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Show HN: Laser Graffiti

https://laser.consti.de/media/og.jpg
This is a DIY laser graffiti project that uses a mouse or finger as the "laser" to draw on a projector screen. The camera detects the drawn strokes and maps them onto the projector, creating interactive artwork.
https://www.eff.org/files/banner_library/ai-robot-warhol-2.png
The US Supreme Court previously warned against expanding copyright protections in response to new technologies, but some rightsholders are now asking courts to do so. Courts should decline to expand copyright protections based on hyperbole and speculation surrounding AI-generated works.

Smartphone LED detects hidden cameras with AI

https://www.chosun.com/resizer/v2/HFSTKZJVMNSDKNLFMRSTANJYMY.jpg?auth=ca4b4b31e7de329febd255ad4b332aa3cedfb7d55ee476a7f1433c0707971546&width=1200&height=630&smart=true
Smartphone LED and AI Detect Hidden Cameras KAISTs SweepLED achieves 94% accuracy with 10,000 won LED device A technology has been developed to detect

Reverse engineering my ADHD test

https://nullpt.rs/posts/reverse-engineering-adhd-test/telescope.jpg
The author, after noticing clear stars on a night of light pollution, ordered a telescope and discovered it sparked an interest in new hobbies. This led to him getting evaluated for ADHD by his psychiatrist.