Allion

Honest apps.
Built solo.

A planner for ADHD brains and puzzle games that don't cheat you. Offline-first, no accounts, no dark patterns.

See the apps How they're built
  • DopaDay app icon
  • Blockful app icon
  • Color Fill Puzzle app icon
  • Sudoku Origin app icon

Everything I've built.

  • DopaDay app icon: a white four-pointed star on a warm orange background

    Productivity

    DopaDay

    Google Play: “DopaDay: ADHD Day Planner”

    ADHD planner & dopamine menu. No tricks, no data hostage.

    • Android
    • Local-first
    • No account
    • Free + Pro upgrade
    Google Play Android only for now

    com.dopaday.app · Privacy policy

  • Blockful app icon: a grid of glossy coloured blocks with one bursting in the centre

    Puzzle game

    Blockful

    Google Play: “Blockful : Block Puzzle”

    Fair block puzzle — no rigged pieces, no forced ads. Clear lines, chase combos.

    • Android
    • 100% offline
    • Free
    • Optional ads only
    Google Play Android only for now

    com.blockful.game · Privacy policy

  • Color Fill Puzzle app icon: four rounded squares in red, cyan, yellow and green on a dark navy background

    Puzzle game

    Color Fill Puzzle

    Free on Google Play · $9.99 on the App Store

    A relaxing color fill puzzle. No timer, no failure screen, no pressure.

    • iOS
    • Android
    • No timer
    • No failure screen
    Google Play App Store · $9.99

    com.allion.colorfillpuzzle · Privacy policy

  • Sudoku Origin app icon: a blue rounded square containing a four-cell grid with the digits 1 and 2

    Puzzle game

    Sudoku Origin

    App Store: “Sudoku Origin: Classic Puzzle” · Google Play: “Sudoku Origin: Offline Puzzles”

    A full Sudoku engine — generator, solver, and hints — in a board that stays out of the way.

    • iOS
    • Android
    • Fully offline
    • Free + ad removal
    Google Play App Store

    com.allion.sudokuorigin · Product page · Privacy policy

  • Sifaro VPN app icon: the word Sifaro above VPN in white on a magenta-to-purple gradient

    Networking New on Google Play

    Sifaro VPN

    Free with ads · Premium from $9.99 / month

    A VPN client built on Xray — VLESS and REALITY transports, with the connection logic kept simple enough to trust.

    • iOS
    • Android
    • Xray · VLESS
    • No traffic logs
    Google Play Product page App Store soon

    com.sifarovpn.app · Privacy policy

DopaDay

A planner that works the way your brain does.

Most planners assume you already have executive function. DopaDay doesn't — it starts from the assumption that starting is the hard part.

The dopamine menu.

A personal list of things that reliably get you moving. When the will isn't there, you're not staring at a blank day — you're picking from a list.

Local-first. No account, ever.

Your day lives on your device. Nothing synced to a server you don't control, nothing held hostage if you stop paying. And no medical claims — it's a planner, not a treatment.

Today

  • Reply to the store review
  • Ship build 236
  • Draft the privacy page
  • Walk, 20 minutes

Dopamine menu

  • Loud music, one song
  • Cold water on the face
  • Tidy one surface
  • Text a friend back
  • Five minutes outside

Your data

0 accounts

0 trackers

100% on device

Free core, with an optional Pro upgrade:

  • $3.99per month
  • $19.99per year
  • $34.99lifetime

Games

Puzzles that
respect your time.

The casual puzzle genre is full of games that quietly rig the board to sell you a revive. These don't. Same relaxing loop, none of the manipulation.

  • Blockful

    Fair piece system — every piece you're handed is guaranteed to have a place to go, so every game over is honestly yours.

    • 8×8 board
    • Undo & hint
    • Daily streak

  • Color Fill Puzzle

    No clock, no lives, no "you failed" screen. Losing costs nothing — the board just resets and your score is logged.

    • Flutter
    • No timer
    • Endless

  • Sudoku Origin

    A real generator and solver underneath — puzzles are produced and verified on device, not pulled from a fixed list.

    • Generator
    • Solver
    • Localized

How it's built

One person,
two app stores.

  • 0 accounts or trackers in anything I ship
  • 0 platforms — iOS and Android, from one codebase each
  • 0 release builds on Sudoku Origin alone1

The toolkit

  • Flutter
  • Riverpod
  • Capacitor
  • Vanilla JS canvas
  • Firebase
  • AdMob
  • RevenueCat
  • Cloudflare

Two different shapes of app, two different stacks. Flutter where the game logic is heavy and shared; a single hand-tuned HTML canvas wrapped in Capacitor where every frame and every kilobyte matters.

Where it's made

Proudly designed and built in America.

Every line of it — design, code, art, and store listings — written here.

Let's talk.

Open to freelance work, collaborations, or just comparing notes on shipping solo.

Email me Browse the apps
  1. Build number 236 of Sudoku Origin v2.2.5, counting every internal and store release build.
  2. DopaDay Pro pricing shown in USD and excludes tax. The free tier is fully usable on its own.
  3. Store availability varies by region and may change as apps move through review.
  4. Designed, developed, and published in the United States.