Solo developer. I build and run Solous — a private journal for the things that fit nowhere: you write an entry, and years later your past self gets a reply from whoever you've become. Each line can say who's speaking — Joy, Fear, "the 15-year-old".
Optional end-to-end encryption; with it on I can't read your entries. Installs from the browser on iPhone and Android, no app store. Bootstrapped, no funding.
https://solous.live