16-year-old Marko Savyn launched Dev Journal, a free productivity app for developers that combines daily journaling, task completion, goals, habits, and project tracking into one workflow.
16-year-old Marko Savyn launched Dev Journal, a free productivity app for developers that combines daily journaling, task completion, goals, habits, and project tracking into one workflow.
Marko is in the tenth grade of the secondary school No. 1 in Truskavets. He has been interested in programming since he was 12. At the age of 14, he became a student at the Step IT Academy. He already has experience in creating Telegram bots and websites, but these were pet projects. Dev Journal became the teenager's first global development.
"The idea was to create a convenient application for planning ideas, tasks, etc., for developer projects. I tried many applications and not one of them suited me, so I decided to make it myself," said Marco.
The application was built in about 1.5 weeks using GPT-5.3-Codex and Gemini 3.1. The launch took place on February 23.
Dev Journal offers planning, execution, and analysis in one place. The main idea: to make stability in work measurable.
Key features:
“The development cost me a subscription to GPT-5.3-Codex. There are plans for monetization, but right now the application is completely free, if the user wants to support the development, there is an opportunity to do so on the application website. You can follow the progress of the application on my LinkedIn page,” the developer adds.
Mark's plans include promoting Dev Journal and developing a new version with more and more convenient functionality.
