Independent Studio · Est. 2026
DL404 is a one-person indie studio at the intersection of software, mathematics, and music. If you found us — you were meant to.
Not a company. A statement. Every project here was built because it needed to exist — not because someone asked for it.
About
DL404 is the umbrella for everything built, discovered, or composed by Danylo — developer, mathematician, and musician based in Kharkiv, Ukraine.
The name says it: we're not where you expect to find us. No corporate hallways, no investor decks. Just work that matters.
Every project under DL404 is made by one person who cares too much to ship something average.
Danylo
Founder & CEO
Undergraduate researcher at H. S. Skovoroda Kharkiv National Pedagogical University. Published constants in OEIS. Builds web apps, creates music independently, and ships projects before they're safe to ship.
Projects
Software, research, and experiments — each one built because it needed to exist.
ChuChar
Ukrainian messenger with AI assistants Yaryna and Yaryk. Communication + AI, built in Ukrainian and for Ukrainians.
chuchar.lovable.app Dev · ToolKovza
Presentation generator. Drop a topic — get ready slides. No more midnight PowerPoint suffering.
kovza.lovable.app GameTimes Clicker
A clicker game about time. Built from scratch — mechanics, balance, and the feeling of the process. Small but complete.
v0-times-clicker.vercel.app MusicV1R1DIAN
Independent music alias. Sound is mathematics you can hear. On all major streaming platforms.
indiefy.me/v1r1dian ResearchOEIS A396384
Constant D = Σ 1/(2·n!+1). Expected number of levels in an infinite hierarchy of circles where a marked vertex actually falls. Published with full preprint.
oeis.org/A396384 ResearchOEIS A395680
Constant d = ∏(1 − 1/(2·n!+1)). Probability that a marked vertex never falls in an infinite hierarchy — the companion to D. Published with geometric interpretations.
oeis.org/A395680 Dev · EducationУрок+
Platform for students and teachers: a task generator for formative assessment. Built to make differentiated learning work in Ukrainian schools.
urok-plus.vercel.app Game · TycoonHausdorff Lab
Virtual lab tycoon: a math teacher calculates product purity to one decimal and builds an empire on pure calculation. Think you can do better?
hausdorff-lab.base44.app BotDanTing
Telegram dating bot built differently — no infinite feed of profiles, no attention auction. Built on first contact and conversation, not first photo.
t.me/danting_bot Bot · MathBrainMathX
Telegram bot that solves almost everything: equations, inequalities, derivatives, integrals, matrices, geometry. Type a problem or send a photo — get step-by-step solution.
t.me/brainmathx_bot Bot · DevDanonim
Ukrainian Telegram bot for anonymous communication. Chat, find people, ditch the void. WebSocket-powered web interface in development.
t.me/danonimukr_bot Satire · DevГОСБЕНЗИН
"State portal" for free gasoline: application forms, electronic queue, counters — submitted forms already exceed Russia's remaining fuel reserves. Pure distilled bureaucracy.
gosbenzin.vercel.app Satire · GameСова на скакалці
Dark-humor fortune telling with animal cards. The owl will honestly tell you if you'll survive until tomorrow. Spoiler: no.
sovanaskakalci.vercel.appContact
We're on the internet. Everywhere that matters.