Alternatives
Products that do what Kairos does
Mobile
- 1AF
I'm a long time lurker that recently quit my job to work on my own projects, a lot due to the inspiration from Hacker News. Now I have published my first serious project, an app for learning how to write Japanese characters. It's the app I always wanted but couldn't find when I was studying. It tries to be simple to use, you just start the quiz and go with the flow. There's no need to plan and manage your studies, and it uses spaced repetition for better retention. There's a promo page with more details up at http://www.kanjibyhand.com. It's only for Android so far. The free version includes…
2012
- 2M1
https://play.google.com/store/apps/details?id=com.daveganly.yarrly Hi, this is Yarrly - my first android app, backed up server side by a mongo & node.js backend. It’s a two-panel image generator, and quite a fun experiment in a no-login (‘anonymous’) app. You generate two panel images using photos or gallery pics, and add text, then it’s uploaded to Yarrly.com - creating an instagram-like link. For example you create http://yarrly.com/y/4hhs6ryyq73da533d, then android intents mean that if you open that link on a device that has Yarrly, you can…
2013
- 3AW
So, me (dev) and my friend (designer) have been building a website/mobile app to help users manage their game library (think MyAnimeList, but games) for a little over a year. We launched with a very basic set of features, and have been slowing expanding since then. All the code is open source, and most of the things we implemented were direct feedback from users (e.g. being able to import games from Steam/PSN, and the Posts feature). We don't show ads or have any kind of subscription. This is just a hobby project. Any feedback would be greatly appreciated, as honestly the hardest…
2025 · gamenode.app
- 4OI
I'm trying to get the motivation up to actually finish building out a "real" product, and I found myself needing a "win" to keep my momentum up. So, I hacked out a little one sentence journal app last night. I experimented with a few UI things (e.g.., the autosaving of the sentence for today and so on), so it was a good learning experience also. You can check it out at: http://osod.im
2012
- 5
- 6DI
This is my first web app, so there are bound be to be a few kinks that need to be worked out. That's why it's here, in hopes that some of the awesome people I read about on HN can take a minute to offer some criticism. http://dailydo.it/ DailyDo.it is meant to replace the canonical to-do list with a do-it list – a list of things that you will actually do. My monetization plan is based on team do-it lists, where you can see your teammates' do-it lists and assign them tasks, while keeping the individual do-it lists totally free. Please let me know if you find any bugs, what the pain points…
2012
- 7IC
Hi Everyone, I created a mobile app called Accumoo, and I would appreciate it if y'all can have a look, download and give me a favorable review. Lots of blood, sweat, tears and love went into this app, and I hope you LOVE it as much as I do - it's the app I always needed and wanted. Anyhow, I've been a Rails developer and Software Engineer for a long time, and this is my first stab at a mobile app. It's a "habit tracker" app on steroids that's just fun to use - syncs across devices, local-first architecture - and an easter egg game for good measure. Help a disabled vet out and give it a go.…
Jan 2026 · apps.apple.com
- 8OO
Yeah I know I hate the name too but I wasn't about to pay up for odyssey.app. It's an open source project so feel free to poke around with it / fork it. I talk about it more on the marketing website, but a few of us have been using it for the past month and kind of fun. Obviously there will be a slew of issues / feedback / nits that come from this, but c'est la vie. GH is here: https://github.com/johnlarkin1/odozi
Apr 2026 · odozi.app
- 9MM
Inspired by the following post by photon_off... http://news.ycombinator.com/item?id=1683309 I made karmurl last night. It's a simple app where you submit a URL for feedback, then for every piece of feedback you give to someone else's, you get to read one piece of feedback for yours. http://karmurl.com
2011
- 10MA
Hi everyone! First time posting. I built this mini memory game in an attempt to beat lazy memory syndrome. because when was the last time you remembered what you did the day before purely based on memory (or without being prompted) ? Super simple fun game for giving our brains a quick workout and actually reminding it on how to remember. If you had those old Nokia phones from the early 90s, the game will seem insanely familiar to you
Sep 2025 · shraddhabuiltitwithai.com
- 11BY
I've just published my app and I would love to have more feedback on it. I got the idea when I was busy moving around several projects during my last semester. And I always don't know which project I should work on next. Even worse, whenever I'm busy with something, I no longer have time to "read book", "go jogging" etc. That's when I thought it would be great if there is an app that keeps track of all the tasks that you want to do and habits that you want to make. And here it is! https://www.youtube.com/watch?v=sKVr0k9Hax0…
2014
- 12
- 13MF
Hello, I have just finished my second app, which is also my first ever pay to download app. It's called StreamClock, It's like a radio alarm clock, but uses a Last.fm radio station, or Spotify Track chosen by the user. It took me 1 month of evenings and weekends, and I fell like I have learned a lot. I am particularly proud of the logo... To find it just search "StreamClock" in Google Play. I would really appreciate any feedback, comments, questions or suggestions. Thanks.
2013
- 14MA
Playstore link: https://play.google.com/store/apps/details?id=com.supervoid.guessthesubreddit Also on Product Hunt : https://www.producthunt.com/posts/guess-the-subreddit-reddit-quiz-game Screenshots: https://imgur.com/a/R4oOW2h Developed using React Native Saw that meme this morning, yeah? Or that cute puppy video, you liked it... but do you remember which subreddit it is from? And there's so many related subreddits that you don't know of which have better content! What if there was a not-so-boring way to get to all this...…
2020
- 15IB
It's like a mix between Picross (Nonograms) and Polyominoes. It's a minimalist puzzler which has no text, no tutorials (none required) and no ads set in a relaxing environment. App Store: https://itunes.apple.com/gb/app/shapeuku-shape-puzzle-game/i... Play Store: https://play.google.com/store/apps/details?id=com.dtbgames.s... I have a bulk load of Android promo codes to give away, so if you'd like one let me know! (Sorry iOS users, I have no free codes left!)
2018
- 16RD
Hi Everyone, I've just launched my new android app Rova http://bit.ly/1kZOkwm which allows you to view streamed video stories about different places based on your location. There's also a pokemon go style element that pays you for visiting popular locations based on the community. I've been working on this singlehanded for a few months solid so I wanted to show you guys where I am. I'd love your feedback on everything from design to usability. Cheers and best regards, Robbi.
2017
- 17LC
Im working on a mind mapping app that would allow for integration of gamification features and be nicer and easier to remember. I was missing more advanced graphics from apps and being able to treat it as my note taking and learning tool. i.e. how (and why?) should I remember a mind map if it looks the same like all other maps and all i can do is pick couple of shapes and dashed/dotted lines? this simply doesnt work with my brain so i decided to create something better :) map on page is a preview of this, but im curious about the quiz, typing games and cheatsheet, would love some…
Oct 2025 · mindmapsonline.com
- 18MB
My brother is trying to rewamp his career into that of an independent game developer. This is his first attempt at an Android game. Any critique or advice for improvements are highly welcome!
2011
- 19
- 20ON
Hello HNers, We have just released our Android App for Finderous and it can be downloaded from Goolge Play at https://play.google.com/store/apps/details?id=com.finderous. Finderous (http://www.findero.us) is a location aware Q&A app with following places as the main feature. Finderous is also available on iPhone and was released a few months back. I would really appreciate some feedback on the app with comments and suggestions. Thanks
2012
- 21IM
Hi HN! In the last couple of weeks I've been working on Cranki: Cranki = Crosswords + Anki. (It's a stupid name tbh, haha) I like doing crosswords in Spanish (to learn vocab) but none of the apps out there allowed me to use my own list of words that I come across. So I built one instead. It's entirely client-side. No server, no database, no accounts, etc. Your words and stats are stored in local storage. I built this for myself but let me know if you like it!
Apr 2026 · cranki.app
- 22
- 23MF
After graduation, my friend and I decided to build mobile games instead of finding jobs. Today we released our first game called Monster Rivals. It is a fighting game with simple RPG elements such as stats and items with unique powers. We have a lot more planned for it in the future, but wanted to get the game out as soon as possible. The game also allows you to fight your friends through Facebook. The game data including the user/character profile is all on my servers hosted on linode. We have 3 servers- [primary mongo], [secondary mongo], [mongo arbiter, redis(for leaderboards), nginx…
2013
- 24
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