21days – React Native IoT Habit Tracker

What it does

<p>To take full advantage of the Particle Photon&apos;s <a href=&#34;https://docs.particle.io/reference/firmware/photon/#particle-function-&#34;>cloud capabilities</a> my friend <a href=&#34;https://github.com/christopherchan35&#34;>Chris Chan</a> and I built a mobile app that can connect to the 21days frame and track my habits. Building a cross platform mobile app if you&apos;re familiar with Rea

Challenging myself to be healthier! Having fun while I'm at it! To take full advantage of the Particle Photon's cloud capabilities my friend Chris Chan and I built a mobile app that can connect to the 21days frame and track my habits. Building a cross platform mobile app if you're familiar with ReactJS or javascript/html is now easier than ever thanks to React Native . You can download the source for this app from my Github repo and compile it with Xcode. Also, I'm open to feature requests! Create an account to leave a comment. Already have an account? Log Infrom hackaday.io

• 
  A free minimalist daily habit tracker2024 · rdht.vercel.app · ▲158

  Hello. I was looking for a simple and clean habit tracker. I went through a few apps but felt they were missing something. I also had some time on my hands, so decided to make my own and share it in case anyone else likes it. Some of the supported features: Streaks based, track and beat your longest streaks Fully useable offline Freezes (similar to Duolingo's streak freezes) Visual map for tracking consistency Pause the app when you need a break or will be away For anyone curious about the tech stack: - React for frontend - Dexie cloud for storage and syncing - Vercel for hosting Link:…

• 
  Simpluna2021 · simpluna.app · ▲68

  I've been running Simpluna, a period-tracking app, for six years. It's a company based in Tokyo, Japan, but development and operations are basically a one-person effort. The app is built with React Native (Expo). The defining trait of the app is that it's simple, with no unnecessary features. Recording periods, calculating predictions, and sending notifications — that's the core of it. This space is dominated by big players (Flo, Clue, and in Japan, Luna Luna). Building something similar would have been hopeless, so I made the things those apps don't have my selling point. Optional features…

• 
  Neohabit – custom github heatmaps for X times per Y days activitiesFeb 2026 · github.com · ▲44

  Hey HN! I recently open-sourced a project that I came up with in the late 2022 and have been working on and off since. It's taken around a year or so of active development in total. My problem with habit-trackers is that they're all the same. All of them basically allow to track only one thing - X times per 1 day. That's very rigid and goes against my instinct to ease into new things. I wanted something that's flexible, self-sustainable, and wouldn't require a lot of maintenance. After a bit of tinkering I came up with something novel - adjustable habit frequencies. And made all the custom…

• 
  I built a daily sunlight tracker2025 · lumehealth.io · ▲46

  I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!

• 
  Rabbit Habit Tracker2021 · ▲114

  A minimalistic habit tracker with a powerful iOS14 widgets

• 
  Hyper minimalist habit tracker for Chrome2022 · chrome.google.com · ▲29

  I'm an undergrad at cal who's trying to get better at React and building apps. I'd love any feedback on the general UI and user experience, new to coding products! If you don't want to download it, but still want to give me feedback, app demo vid & pictures in official launch https:&#x2F;&#x2F;tinyurl.com&#x2F;reactlaunch Please let me know your thoughts, critical or supportive! Looking to learn

• 
  /dev/null▲491

  a social network for devs

  Dev tools · 4d ago · dev-null.sh

• 
  Run full iOS 16.5 firmware on Android Devices▲459

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

  Dev tools · 20h ago · github.com

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 29d ago · github.com

• 
  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 · 27d ago · github.com

• 
  OpenBot▲362

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

  Dev tools · 24d 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 · 22d ago · talanoa.email

• 
  Unsplash 5.0▲1,501

  Free (do whatever you want) high-resolution photos.

  Dev tools · 2017 · unsplash.com

• PF
  Privacy-focused, ad-free, non-tracking torrent search engine▲1,183

  Life & fun · 2017 · skytorrents.in

• AA
  Alacritty, a GPU-accelerated terminal emulator written in Rust▲1,170

  Initial source-only release of Alacritty

  Dev tools · 2017 · blog.jwilm.io

• 
  Opera Neon▲892

  A concept of tomorrow’s web browser you can play with today.

  Life & fun · 2017 · operaneon.com

• 
  Founderkit▲858

  Unbiased reviews of startup tools from experienced founders

  Dev tools · 2017 · founderkit.com

• 
  Magnet 2.0▲739

  Window manager for Mac

  Work · 2017 · magnet.crowdcafe.com