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Each moving arrow represents a real bike ride. There are 291 million rides in total, covering 12 years of history from June 2013 to December 2025, based on public data published by Lyft.<p>If you've ever taken a Citi Bike ride before, you are included in this massive visualization! You can search for your ride using Cmd + K and your Citi Bike receipt, which should give you the time of your ride and start/end station.<p>Some technical details:<p>- No backend! Processed data is stored in parquet files on a CDN, and queried directly by DuckDB WASM<p>- deck.gl w/ Mapbox for GPU-accelerated rendering of thousands of concurrent animated bikes<p>- Web Workers decode polyline routes and do as much precomputation as possible off the main thread<p>- Since only (start, end) station pairs are provided, routes are generated by querying OSRM for the shortest path between all 2,400+ station pairs<p>Legend:<p>- Blue = E-Bike<p>- Purple = Classic Bike<p>- Red = Bike docked<p>- Green = Bike unlocked
Hi HN,<p>I am a CTO/Founder usually stuck in "development hell" on long-term projects. To fix my perfectionism, I started a challenge on Jan 1st: Ship 12 startups in 12 months.<p>This is Project #01: TierWise.<p>The Problem: Most SaaS founders price for the US/EU market. Charging a flat $49/mo excludes huge segments of users in LATAM, India, or Southeast Asia where purchasing power is lower. Building a custom GeoIP/PPP logic for every side project is a distraction.<p>The Solution: I built a drop-in JS widget that detects the visitor's country and calculates a discount based on their local Purchasing Power Parity (PPP).<p>The Stack (The "Speed Run" setup):<p>Backend: Laravel 11 (API).<p>Frontend: Nuxt 3 (SSR).<p>Logic: Custom Middleware + Redis (for request throttling) + MaxMind GeoIP.<p>Design: Soft Brutalism (trying to avoid the generic "AI dark mode" look).<p>Business Model: It’s an open SaaS.<p>Free: 500 adjustments/month (no credit card).<p>Paid ($9/mo): Unlimited + White-label.<p>I’d love your feedback on the implementation and the "Soft Brutalism" UI approach.<p>Link: <a href="https://tierwise.dev/" rel="nofollow">https://tierwise.dev/</a>
Long time lurker here. My family had a pen-and-paper game we'd play on long drives to visit my great-grandmother. After she passed, I spent the holidays recreating it:
<a href="https://a26z.fun" rel="nofollow">https://a26z.fun</a><p>How it works:<p>Find 15 words from a category (like "Stone Fruits," "US States," or "Dog Breeds") as fast as you can. Once you meet the 15 word minimum, you can play for as long as you want.<p>Each letter shows how many target words start with it (A¹ = one word starts with A, N² = two words start with N)<p>That small ² in the bottom-right? Multi-word answers allowed. For "US States" with N², both "NEW YORK" and "NORTH DAKOTA" count<p>Unlimited guesses, 2 hints, and a shuffle button to reorder by frequency.<p>Example:
Category: US States | Letters: A¹ M¹ N² S²
Answers: ALABAMA, MONTANA, NEW MEXICO, SOUTH DAKOTA<p>If you're into Connections or Strands, this scratches a similar itch but with a deduction twist.