Ask HN: What apps did you build for yourself and why?

I built a web app called Bucket for tracking todos, inspired by the technique described in this video[1] whereby you put tasks into buckets based on the time horizon for completion.

Your tasks are stored entirely in your browser, so there's no back-end, no risk of losing access, works offline, you can export any time, and you can share your tasks between devices using the Sync URL. You can use it here (for now, looks best on mobile): https://lusmo.re/bucket/

I built it because it was easy, it does exactly what I want, and I don't need to rely on some 3rd party to profitably monetise todo apps so that I can use it indefinitely.

[1] https://youtu.be/iNG1a--SIlk?t=28m48s

I agree, being able to build things that scratch your own itch can be amazing.

Some of mine:

- a simple real time location sharing app[1] -- all the alternatives at that time were either clunky, with time limits, designed just for driving or with horrible privacy issues

- an SMS app for when the Nexus 7 2013 tablet was still relevant[2] -- google blocked all SMS clients on that device for some reason until Android 6.0, but I managed to find a workaround

- a way to find out the real network operator of any mobile phone in Romania[3] -- when you switch operators, you have the possibility of taking your phone number with you, so you can't rely just on number prefixes for lookup

[1] https://play.google.com/store/apps/details?id=com.emilburzo....

[2] https://play.google.com/store/apps/details?id=com.emilburzo....

[3] https://play.google.com/store/apps/details?id=com.emilburzo....

I built an application for myself called meditations: https://github.com/ioddly/meditations

It's actually...a todo application, but focused on habit formation and creating a positive feedback loop around a few consistent habits or projects.

I wrote it for myself because there was nothing quite like it that I was aware of. I use it on a daily basis; I also learned a lot of frontend development by having to maintain and use a real, interactive application.

> it's also pretty cool to see it being used by other people around the world.

It is cool! I've gotten one or two reports of people using it, despite the fact that I've taken almost no effort to make it easy to use, and it feels good.

I haven't published it on any stores because it's a self-hosted application -- you can keep all your data (encrypted if you want). I actually thought there would be no market for anything like it but over the years I've learned of a few that are making a decent revenue.

Bottom line, it's fun and rewarding to work on.

I have a music streaming app (https://audiostreamer.org/) running from a machine at home that I like to listen to at work.

Verizon FIOS loves changing my home IP address randomly, especially whenever we lose power at home, which is unfortunately common. Since I can't know my IP in that case without being at home, I built a super small web app that I call Waypoint.

Essentially, every morning my PC pings the server running Waypoint. The app stores my IP address. If the IP ever changes and I'm not at home, all I need to do is go there to get the new one. (Yes, the website is password protected).

All-in-all, it took probably less than 30 minutes from start to finish to get this setup working, and it solved a minor problem in my life.

I built lnav (https://lnav.org) to help dig through the log files of the product I was working on at the time. I grew tired of having to manually interleave log messages from multiple files, so I created lnav to do the work for me. I started it over a decade ago and have used it at every job I've worked at since then.

I built CronAlarm (https://www.cronalarm.com) to solve a problem I was having at my primary job. I had several dozen cron jobs / scheduled tasks that ran at various times of the day, multiple times of the day, and across a range of servers. It became a little unwieldy to adequately monitor and I too often didn't know anything was wrong until somebody complained. So I built an internal tool to centralize the results of the jobs and to send me alerts when a problem was detected.

There are other cron monitoring tools out there, but at the time I didn't realize that. I didn't even look for one before building my own, actually. After stumbling across another option online one day, I thought to myself that if somebody was willing to pay for such a service, why not put my own out there? I thought mine was/is different enough from the others that it may be a compelling alternative to existing solutions. Thus, CronAlarm was born.

I've been working on a tool for analyzing my DJ track library, with the goal of doing a little semi-supervised learning to help organize my crates, remind me about music that might be getting lost in the shuffle, and - eventually, if all goes well - automatically scan beatport, soundcloud, etc for new tracks and notify me about music that might fit into my library. It doesn't actually do anything useful yet, but even if it never comes together the way I'm imagining, it's already been a great ML learning experience:

http://www.github.com/marssaxman/robocrate

Building REST APIs for database schemas which do not follow conventions of frameworks (rails,django,play etc) is incredibly tedious.

Xmysql solves this problem [1]. Within 2 seconds you can serve REST APIs for any MySql database. Other than CRUD-List APIs it has few more cool APIs and features relating to filtering, grouping and prototyping.

[1] https://github.com/o1lab/xmysql/

A built a free password helper for iOS because I’ve accepted that password reuse sucks, but so do traditional password managers. So this app takes snippets from valid site information and uses a secure hash algorithm which creates a binary, which I map to an string of ascii values to generate a password. It includes a per site salt and a device specific code to counter reverse engineering attempts. The salt can be which whatever you want, and you must remember a final passphrase (if you use one) to get the passwords regenerated. You have to kind of keep track of the length of these generated passwords yourself, because it’s truncated for differing password lengths. Anyway, on the whole imho it’s more secure than many a password manager on the market, save that it’s still new and requires use of copy/paste buffers. But, all of that is of course predicated on using the tool correctly, and using caution with passwords, which you should do anyway.

The App is DyfynderX if you’re interested. The name comes from dyfnder, which is the Welsh word for depth.

I built a macOS App last year for managing Screen Shots.

I run a development agency and love taking snapshots from various blogs & websites. They were getting difficult to manage.

So I created a small utility to manage screenshots on macOS.

https://shots.mobilefirst.in

Send me your feedback on this.

I built https://dndemail.com because I wanted do not disturb functionality for my email. I like to only check email 2x a day, but I would find that my workflows would often require me to visit my email (to look up an old email or send a new email). I would get distracted by new emails in my inbox.

DNDEmail keeps my inbox empty -- my new messages are only delivered on the 2x day schedule. It helps me stay focused even when I have to go into my email.

On the weekends, I keep my email off entirely.

It is also in the chrome webstore: https://chrome.google.com/webstore/detail/do-not-disturb-for...

As "the computer guy" at my office, I was tasked with printing a football pick 'em pool sheet each week of the NFL season (no way we could get everyone to use an app). Built something that fit our needs and assumed others would use it, as well: http://footballpickempool.net

Another fun one that I love sharing with people: http://donetemperature.com. I love to grill, and I am a stickler for doneness of the meat, for both safety and preference. I found myself always relying on a web search each time, and the top results are all for random food blogs, and the info I needed was always buried somewhere in a massive recipe post.

My app Baajet was also created extensively for travelling purpose, which I created to help me keep track of my travelling budgets with simple UI, no reports or charts and graphs.

Just keep tracking daily budget. Plain and simple.

https://baajetapp.com

I built an image sharing utility connected to a friend's service, because I wanted to be able to directly share an image from anywhere on my phone without going on his website.

https://pix.artemix.org/

I built [https://scinder.io](https://scinder.io) as a way to analyse my running and cycling data to see how well I was training and if I'm on track to achieve the goals I've set myself. I've found that a lot of the services I'd used previously didn't give me the depth of analysis that I needed to be able to make decisions about my training schedule.

For a long time the project just sat on my PC but I'm now trying to try to turn it into a paid service as I think some of the features I've added are pretty cool and I've not seen them anywhere else.

I’ve built Fog[1] which is an Overcast[2] wrapper for macOS. I started it because I wanted to listen to podcasts on the Desktop but also wanted to control playback via media keys. I’ve since added a few more features.

I’ve made SandwichTimer[3] because no other pomodoro timer did what I wanted — to be minimally controllable via the CLI (so I could do it from Alfred[4], without needing the mouse) and to show the remaining time just as minutes (seconds are distracting, and a pie isn’t accurate enough). Since I also frequently needed regular timers and needed to use the phone for those, I’ve baked that in as well.

PinPlus[5] because I wanted a simple app to add Pinboard[6] bookmarks that looked good and I could dismiss with ⎋.

Sacar Musak[7] not for me, but for my friends that want to download videos from Youtube and kept downloading shady apps I did not trust.

I have a ton more in the form of CLI tools, but the apps I use most frequently are the Alfred Workflows I’ve made[8].

[1]: https://github.com/vitorgalvao/fog

[2]: https://overcast.fm/

[3]: https://github.com/vitorgalvao/sandwichtimer

[4]: https://www.alfredapp.com/

[5]: https://github.com/vitorgalvao/pinplus

[6]: https://pinboard.in/

[7]: https://github.com/vitorgalvao/sacar-musak

[8]: https://github.com/vitorgalvao/alfred-workflows

I built https://www.remotepassword.com because I didn't want to hardcode passwords in my scripts and wanted a way to disable them remotely (ie my raspberry pi has been stolen and I don't want them to mount my backup truecrypt containers).

It works fine and gave me some peace of mind!

I wrote a simple web-based RSS client: https://github.com/travisred/bottomfeeder

I got tired of looking for a lightweight option that would run on pretty much any VPS or webhost. And I can modify it any time I want without learning a large codebase.

A long time ago I built an app to monitor online retailers for items that were hard to find in-stock. It would send me text alerts so I could buy them before they went out of stock again. I made it into a business for a while, then the retailers caught on and stopped paying commissions on a those items.

I’ve also built code generators for myself.

Here's a link to the app mentioned in the OP: https://itunes.apple.com/us/app/billy-currency-converter/id1...

@timojaask developed it and I designed it

I got sick of how slow ESPN/Sportsline/NFL.com etc. were when all I wanted was to see NFL scores. So I made a little script to pull the NFL's live JSON game data file and display it in plain text. Bold who had the ball, italicize if they were in the red zone, etc.

I wrote a Greasemonkey script that creates page previews for Wikipedia, so I could cover more ground understanding terms and articles. This was about a year before Wikipedia's official page preview feature was made live.

Right now I'm slowly building a Git GUI for working with changes I make in my TiddlyWiki instances. The app will keep me from getting behind in my commits and be a fun way for practicing Python and working with Toga.

I wrote my home automation software because none of the prebuilt applications I could find did exactly what I wanted or let me customize them in the way that I wanted to. It's not good software, but it works.