Preplyx

What it does

Ace your WAEC, NECO and JAMB exams with Preplyx—realistic mock CBT tests, lessons, and performance tracking to help you prepare smarter.

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  Educato AppMar 2026 · ▲103

  Personalized exam prep, now in your pocket

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  LexieApr 2026 · ▲102

  Snap your notes and get tested before the exam

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  MockoOct 2025 · ▲48

  Don't just Practice, Experience the Exam.

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  Blanker2020 · ▲87

  Memorize your study notes

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  TestBox2021 · ▲153

  Test drive your software options before you buy

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  Daily Bite of Prep2024 · ▲33

  No B.S. SAT prep. 1800+ official & free practice questions

• TL
  The load-bearing vocabulary of Claude▲703

  Life & fun · 10d ago · louisabraham.github.io

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  iPhone app takes simultaneous images from 2 lenses, fuses into 1 photo▲329

  Photosynthesis fires two of your iPhone

  Life & fun · 28d ago · photosynthesis.camera

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  SoloUno▲310

  Take control of hair pulling, nail biting & skin picking

  Life & fun · 28d ago · solouno.io

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  Scroll through all 43252003274489856000 Rubik's Cube states▲295

  Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.

  Life & fun · 26d ago · everycube.alen.is

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  Expeditione▲265

  The Interactive 3D Encyclopedia

  Life & fun · 21d ago · expeditione.fun

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  Eigendrum - Draw any shape and hear what it sounds like as a drum▲243

  Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…

  Life & fun · 26d ago · baselashraf81.github.io

• TL
  The load-bearing vocabulary of Claude▲703

  Life & fun · 10d ago · louisabraham.github.io

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  Hey Noah▲641

  A proactive AI executive assistant for founders

  AI · Aug 2026 · heynoah.io

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  Clipto MCP▲640

  Let agents source clips from terabytes of your local video

  Work · 18d ago · clipto.com

• SA
  Simple algorithm and color space to generate diverse skin tones▲627

  Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…

  Life & fun · Aug 2026 · toneyalexander.github.io

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  AdAnt AI▲608

  Claude for viral, high-converting social ads

  AI · Aug 2026

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  I trained a 125M model to autocomplete piano on-device▲598

  I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes&#x2F;sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

  AI · 16d ago · simedw.com