Products

Software I build and run myself – from the basketball court to the books.

Dashboard, expenses and an invoice with QR slip – demo data
SaaS Swiss SMEs DE / EN / FR / IT

Slonge Billing

AI-assisted bookkeeping. Swiss control included.

Invoices, receipts and double-entry bookkeeping in one app – built for Swiss freelancers and SMEs. AI prepares receipts, bookings and VAT codes; you review and decide before anything is posted.

  • Swiss QR invoices – with automatic payment slip, PDF export, email delivery and dunning.
  • Smart Inbox & AI receipt capture – receipts sent by email or photo become drafts you review.
  • Double-entry bookkeeping – Swiss SME chart of accounts, balance sheet, income statement and VAT return.
  • Time & projects – turn tracked hours and materials straight into invoices.
slonge-billing.ch Try free for 30 days, no credit card.
Flip coverage, per-defender reasoning, zones, help rotation
Web app / PWA Basketball 2026

SlongeHoops

Draw it up. Watch it run. See how it gets guarded.

A play editor for basketball coaches: drag from a player and say what happens – cut, pass, screen, handoff. The app draws the line in the notation coaches already use and runs the play on a court you can view top-down or isometric, scrub and pause.

  • Draw in phases – the way plays are taught in practice. FIBA, NFHS, NCAA and NBA courts.
  • Simulated defense (beta) – drop, hedge, switch or zone: flip the coverage and watch the same play again.
  • 97 plays built in – Horns, Floppy, Flex, BLOBs, ATOs – plus playbooks per team.
  • Share and teach – links without accounts, player quizzes, video export as reels.
slongehoops.com Free to start. No account, nothing to install.
Bonestorm Survivors – surrounded in the Moonlit Graveyard
Mobile games iPhone / Android Closed beta

Slonge Games

Games for one thumb and five spare minutes.

My indie studio for mobile games: short portrait sessions you play one-handed, offline and without an account. The first game, Bonestorm Survivors, is already in closed beta – three more are in the works.

  • Bonestorm Survivors – one hero against hundreds of skeletons. Seven worlds, eleven heroes, twenty weapon evolutions.
  • Beta on iPhone and Android – TestFlight and Google Play testing; no release date announced yet.
  • Up next – a tower defense, a crowd runner and a frozen-city survival builder.
  • Built in Unity – developed in Switzerland, no cookies or trackers.
slonge.games Join the beta on the Bonestorm Survivors page.

Got a product idea of your own?

From idea to running app – I build software I operate myself. I can do the same for you.

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