Menstrudel

What it does

A free, open-source period tracker app that puts your privacy first. No ads, no sign-ups, and no cloud, completely offline.

The open-source, 100% offline tracker that puts privacy first. No accounts, no cloud, no tracking. Just your health, simplified. Your health data isn't a commodity. Menstrudel stores everything locally on your device, ensuring your most personal information stays exactly where it belongs: with you. Track cycles, symptoms, and intensity with a clean, clutter-free interface. Get reliable forecasts for your next cycle based on your unique history. Support for 21-day, 28-day, or custom packs with simple daily logging. Manage IUD, Implant, or Injection renewal dates with proactive alerts. Smart reminders for periods, medication, and contraceptive renewals. Built for everyone.…from menstrudel.app

• IM
  I made a privacy friendly and simple app to track my menstruation2024 · play.google.com · ▲732

  Hey HN, after the app I actually used to track my period wanted me to log in and save my data in the cloud, I decided to write my own. Most apps in this area are based on a subscription model and display far too much information anyway. For me, a simple calendar is enough where I can add a few notes if necessary. So that is the result of my work - a simple design and the data is only saved on the smartphone.

• 
  LadyLog - A period tracker2024 · play.google.com · ▲89

  Easy to use period tracking app that respects your privacy

• 
  Minute2024 · github.com · ▲338

  Open source time tracking app for individuals

• 
  Faye - Free Privacy-first Period Tracker2025 · faye.health · ▲20

  Track your menstrual cycle with accuracy and total privacy

• 
  Tie Tracker2020 · tietracker.com · ▲74

  A simple, open source and free time tracking app ⏱️

• 
  Mensinator2024 · play.google.com · ▲4

  Tailored Tracking, Total Privacy—Your Period, Your Control.

• 
  Run full iOS 16.5 firmware on Android Devices▲528

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 2d ago · github.com

• 
  /dev/null▲492

  a social network for devs

  Dev tools · 5d ago · dev-null.sh

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 25d ago · openbot.run

• 
  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 23d ago · talanoa.email

• 
  AUDR by Chargebee▲323

  Open standard for tracking agent run costs

  Dev tools · 27d ago · openaudr.dev

• 
  YouMind▲1,223

  The first AI creation studio where learning meets writing

  AI · 2025 · youmind.com

• 
  A store that generates products from anything you type in search▲1,184

  The site hit #1 on HN about a year ago. Got enough traffic that I turned it into a proper API. What's there: - REST API — 35k products, manually filterable by category, free key, 60 req/min - CLI — npx anycrap random -c food - faker.js plugin — bundled, no API call, works offline - HuggingFace dataset — full 35k rows for ML/training https://anycrap.shop/developers

  AI · 2025 · anycrap.shop

• 
  Term.everything – Run any GUI app in the terminal▲1,094

  I made a built-from scratch Wayland Compositor to display any GUI app* in the terminal! I think there is a lot of unexplored potential in custom Wayland compositors, a lot of really cool things you can embed existing applications into! So, I started with embedding apps into the terminal because that is the easiest input/output (output is just utf-8 and I use the great `chafa` library for that, and I just read from stdin for the input). If you have any other ideas for cool Wayland compositors, let me know. I purposedly wrote 80% the app in Typescript to appeal to the most developers and…

  Dev tools · 2025 · github.com

• IR
  I recreated Windows XP as my portfolio▲1,032

  Years ago I stumbled across a basic version of this concept and it stuck with me. I knew if I was ever going to take on such a project, it would need to be flawless, but without coding experience it was just another idea that would never happen. By the end of 2024, as AI coding tools exploded everywhere, I finally had a way to make it real. I started from zero knowledge and spent months collaborating with AI agents as a learning experience. Every pixel and every function went through me. The AI translated what I asked for into code, but every decision was human. I didn't use existing OS…

  AI · 2025 · mitchivin.com

• 
  Ada▲910

  Your own AI data analyst

  AI · 2025 · ada.im

• 
  VidAU - AI Video▲868

  Turn Product Images into Scroll-Stopping Video Ads

  Growth · 2025 · vidau.ai