Twin

What it does

Twin spots forgotten subscriptions and junk charges draining your account, then writes the cancellation and dispute letters for you. No bank login. No spreadsheets. Just peace of mind about where your money is going. Built by a veteran for people on real budgets. Free plan forever — no credit card required.

Twin — your digital copy that handles life

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  CentryAIJul 2026 · ▲222

  Subscription tracker built by someone who forgot 11 of them

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  SaveMRRApr 2026 · ▲104

  See how much you're losing to failed payments on Stripe

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  TillyPay2019 · ▲207

  Recurring & single payment links, powered by Stripe.

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  Baremetrics Dunning & Retention2015 · ▲161

  Automatically collect on failed charges in Stripe

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  Churn Buster2014 · ▲112

  Stop Losing Money to Failed Payments in Stripe

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  Hiatus for iOS2016 · ▲96

  Find & track your subscriptions. One-touch Bill Negotiation.

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  PaymentKit▲466

  Billing that survives a processor shutdown

  Commerce · 13d ago · paymentkit.com

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  Equitybee Benchmark▲241

  Compare your startup equity grant for free.

  Commerce · 26d ago · equitybee.com

• 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/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