Portal Design Studio

An independent studio from Romania. We make games and apps — and take every one of them the whole way, from the first prototype to the store listing.

  • Mobile games
  • Apps
  • Websites
  • Open source

Games

Puzzles worth coming back to.

Calm to pick up, deep enough to keep. Free to play, and never built to wear you down.

Out now on Google Play

Onyx Flow

Block puzzle · Android

A block puzzle with a state to chase. Clear lines and the Flow meter charges; keep the board open and every clear is worth more. Reach Flow and the board turns to crystal, multiplying every point you score until you let it slip.

Every block, glow and particle is generated in code — no stock art — and the game holds 60 frames a second on a mid-range phone.

  • Free, ad-supported
  • No lives, no timers
  • Plays offline
  • Daily challenge

Privacy policy for Onyx Flow

Onyx Flow: the moment Flow activates and the word FLOW sweeps across the board.
Onyx Flow: a five-clear HOT combo lighting up a column.

Play in your browser · Android coming soon

Water Sort

Cozy sorting puzzle · Web

A potion shop run by cats. Tap a bottle, tap another, and pour until every bottle holds a single color. No timers and no rush — just the small click of a puzzle coming together.

Every generated level is run through a solver before you see it, so if it can't be solved, you never get it.

  • 5 hand-painted worlds
  • A new puzzle every day
  • Stars can't be bought
Water Sort home screen: three cats brewing potions in a cozy shop.
Water Sort level 24: ten bottles of colored liquid waiting to be sorted.

Apps & projects

Software that has to be right.

A health companion for thyroid patients, and open-source work you can read line by line.

Web app live · Android coming to Google Play

TiroCare

Health app · Web & Android · in Romanian

One calm place for people living with a thyroid condition in Romania: lab results with reference ranges, treatment reminders, a daily symptom journal and a clear report to take to the doctor.

Built for a sensitive space — no account needed, the journal stays on the phone, and AI features run only with explicit consent. TiroCare is a personal organiser, not a medical device.

  • 11 thyroid conditions
  • 12 lab tests
  • No account needed
TiroCare home screen with the latest TSH result, today's doses and a check-in streak.
TiroCare lab results screen with values plotted against their reference ranges.

Live demo · Open source

Echoboard

Feedback boards & roadmaps for SaaS · Web

A complete multi-tenant SaaS: workspaces with roles and invitations, public boards with voting and comments, a roadmap shaped by those votes, an embeddable widget and Stripe subscriptions.

Data integrity is enforced by the database itself, with 60+ integration tests against a real Postgres and CI on every push.

  • Next.js · TypeScript
  • PostgreSQL
  • Stripe
  • Embeddable widget
Echoboard demo board on a phone: feature requests sorted by votes, with status labels and comment counts.
Echoboard roadmap on a phone: ideas grouped into Planned, In progress and Complete.

askdocs Open source

A RAG pipeline that knows when not to answer

Ask a question about a set of documents and get an answer with citations — or an honest “not covered here” instead of a confident guess.

  • Hybrid retrieval: BM25 and dense vectors, fused
  • Treats retrieved text as untrusted input
  • Quality measured with a scored evaluation set

Python · SQLite · runs offline

askdocs in a terminal: asked about a refund policy the documents don't cover, it answers that the documentation does not cover this. The evaluation run below passes all 17 questions, with 100% recall, abstention accuracy, citation rate and injection detection.
Real output, run offline with no API key. Swipe to read →

Open for new projects

Websites, made to order

For businesses and products · in Romanian or English

The same care that goes into our games and apps, for your business: a fast, modern site designed around what you offer, written so people understand it at a glance, and ready to work from day one.

  • A custom design, not a template look
  • Built mobile-first and fast on any phone
  • Domain, hosting and business email set up for you
  • Privacy page and search basics included
  • No trackers unless you ask for them

The studio

Small studio. Whole products.

Portal Design Studio is founded and run by Adrian Iulian Antal, a developer in Romania. Design, engineering, visual direction, sound, store listings, privacy policies and release — it all happens in-house.

That means one person answers for every detail, from how a piece feels when it lands on the board to what the privacy policy promises.

01

Fair by design

No paid continues, no energy, no streak insurance for sale. Water Sort sells nothing at all.

02

Your data stays yours

No accounts in our games and no analytics. Progress is saved on your own device.

03

Engineered to last

Game rules live in engine-free code with 150+ automated tests behind Onyx Flow.

04

Shipped, not just built

Real-device testing, closed testing on Google Play, consent flows and honest store listings.

Contact

Say hello.

Questions, bug reports, press and partnerships — one address, read by a person.

contact@portaldesignstudio.com