Ask HN: What apps have you created for your own use?

An enterprise toolkit for Apache Kafka (and now another for Flink).

I spent years working in large enterprise orgs, a few more working with distributed systems. Along the way I picked up Clojure and by the power of greyskull managed to combine all those factors into a company. Now I work with a small team shipping tools for programmers. Good times.

Today we have users in 100+ countries, but it started off as something I needed for myself / my team when working on client projects.

I’ve built an app that connects multiple phones together wirelessly and records audio with all of their microphones simultaneously. Once you finish recording all the recorded audio tracks are immediately available on all the phones for full-mix playback.

If you aim for the best, studio quality, you can attach any professional microphone to the phone, too.

Should be a nice tool for musicians/bands, podcasters, filmmakers. I’ve created it because I wanted to be able to record my band rehearsals. Handheld recording devices or single mobile phone did not cut it and studio space or equipment was not available or too expensive.

Recording with multiple microphones (multi-track recording) is how you typically record in a recording studio to achieve best quality. The app allows you to do just that but without expensive studio equipment (mixing console, audio interfaces, DAWs, computer, etc.). Also the time to get the full mix that you can play and share is cut almost to zero.

This is a sms based reminder tool that I made for myself and use quite heavily due to its convenience. (No additional apps/website and other requirement)