Diffyn

What it does

The platform for creating, sharing, and collaborating on prompts. Version control, real-time testing, and community-driven prompt engineering. Learn how to create effective AI prompts, collaborate with others, and master prompt engineering best practices.

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  Prompt Engineering Studio2025 · ▲501

  Build, test & deploy AI prompts across 1600+ models at scale

• PE
  Prompt Engineering Made Easy2023 · ▲23

  Hey HN, We've been hard at work on a tool that we believe will change the game for developers, data scientists, and anyone working with models that rely on textual prompts. I'm excited to introduce our new tool: Automated Prompt Engineering (APE). Problem: As many of you know, how you phrase a prompt can significantly impact the results you get from models, especially with sophisticated language models. It often requires numerous iterations to hone in on the right prompt to obtain the desired response. Solution: APE is designed to tackle this exact problem. With APE, you can: - Iterative…

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  Prompt EngineerJan 2026 · geniuscue.com · ▲6

  AI Prompt Engineering Platform for Creators & Developers

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  Prompto - Your Prompt Engineer2025 · ▲11

  Prompt Engineering Toolkit for Developers & Creators

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  PromptCrate2025 · ▲8

  Create. Refine. Monetize.

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  PromptBox2025 · ▲15

  PromptBase - Create, Share, and Discover AI Prompts

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  Dograh▲592

  The open source VAPI alternative

  Dev tools · 26d ago · dograh.com

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  Meridian▲530

  Don't let your work go unnoticed. Get promoted!

  Dev tools · 21d ago · meridiona.com

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  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 12d ago · x1.new

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  Open-Source eInk Bike Computer▲412

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 3d ago · opentrailpaper.com

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  Nuphos▲380

  The AI-Native DevOps Workspace.

  Dev tools · 25d ago · nuphos.ai

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  Lettertrace▲375

  Track your AI visibility for free (using your own API keys!)

  Dev tools · 26d ago · lettertrace.com

• IM
  I'm an airline pilot – I built interactive graphs/globes of my flights▲1,539

  Hey HN! Pilots everywhere are required to keep a logbook of all their flying hours, aircraft, airports, and so on. Since I track everything digitally (some people still just use paper logbooks!), I put together some data visualizations and a few 3D globes to show my flying history. This globe is probably my favourite so far: https://jameshard.ing/pilot/globes/all If you’ve got ideas for other graphs or ways to show this kind of data, I’d love to hear them!

  Life & fun · 2025 · jameshard.ing

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  Chronicle: Cursor for Slides▲1,213

  Stunning presentations with AI. No design skills required.

  AI · 2025 · chroniclehq.com

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  Bubble for native mobile apps (beta)▲1,029

  Build native mobile apps for iOS and Android without code.

  Dev tools · 2025 · bble.io

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  Twenty▲991

  The #1 open-source CRM

  Dev tools · 2025 · twenty.com

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  Pally - AI Relationship Management▲949

  All your connections, across all your socials.

  AI · 2025 · pally.com

• WC
  Workout.cool – Open-source fitness coaching platform▲827

  I was the main contributor to workout.lol, an open-source fitness app to easily build a workout routine. The project had traction (1.4k GitHub stars, 95 forks, ~20K visits/month), but was eventually sold due to video licensing hurdles. The new owner stopped maintaining it, and the repo went abandoned. Over the next 9 months, I sent 15 emails to try to save it : no replies. Feature requests & issues were ignored. The community was left with a "broken" tool let's say. I couldn't just let it die So I built the new version from scratch with the same open-source spirit, but a better…

  Dev tools · 2025 · github.com