# OxiSoft > Software development agency specializing in Golang, Flutter, and Rust. > Privacy-first, offline-capable applications. Based in Bialystok, Poland. > Legal entity: OxiSoft Alexandr Bykov, VAT PL9662168499, DUNS 849495954. ## Services - [Custom Software Development](https://oxisoft.io/services/): Backend, mobile, game, and web development in Golang, Flutter, Rust, HTMX, and JavaScript. - [Grafana & Prometheus Monitoring](https://oxisoft.io/monitoring/): Installation, dashboards, Alertmanager routing, and notification integrations. ## Apps - [NeoMeter](https://oxisoft.io/apps/neometer/): Real-time speed tracking with a futuristic cyberpunk interface - [OXI Calendar](https://oxisoft.io/apps/oxicalendar/): Lightweight desktop calendar with notes, reminders, and premium themes - [Neon Grid Sudoku](https://oxisoft.io/apps/sudoku/): Classic Sudoku puzzle game with a modern cyberpunk aesthetic - [Triple Space](https://oxisoft.io/apps/triplespace/): Space merge puzzle: line up three alike and build a universe - [OxiTick](https://oxisoft.io/apps/oxitick/): Private to-do and notes. Your data stays on your device, sync only to your own server - [OxiType](https://oxisoft.io/apps/oxitype/): Arcade typing game where fast fingers save the planet - [CyberCalc](https://oxisoft.io/apps/cybercalc/): Futuristic calculator with cyberpunk design and encrypted secret notepad - [Habit Observer](https://oxisoft.io/apps/habitobserver/): Habit tracker on a honeycomb: streaks, stats, reminders, no account - [Oxi Pomodoro](https://oxisoft.io/apps/oxipomodoro/): A neon Pomodoro timer: a glowing tomato, a smooth countdown ring, sounds and vibration. No ads, no tracking. - [OFFLIO](https://oxisoft.io/apps/offlio/): Track your cryptocurrency portfolio privately and securely offline ## Blog - [Data that is never collected cannot leak](https://oxisoft.io/blog/data-never-collected-cannot-leak/): Encryption, firewalls and audits all help, but the strongest security control is simpler: don't keep the data. Why data minimisation beats every defence. (2026-10-19) - [Flutter on Desktop: What Broke on Windows, macOS and Linux](https://oxisoft.io/blog/flutter-desktop-in-production/): Shipping one Flutter game to three desktop systems taught us where the code really differs. Video, store packaging, rendering and window size, with the fixes. (2026-10-15) - [Go or Rust? How We Pick the Language for Each Project](https://oxisoft.io/blog/go-or-rust-how-we-choose/): We ship both Go and Rust. The choice is rarely about speed. It comes down to where the code will live: on a server of its own, or inside an app on every device. (2026-10-08) - [What is inside our apps: a dependency audit](https://oxisoft.io/blog/whats-inside-our-apps/): We say our apps have no tracking, no ads and no crash reporting. Here are the real dependency lists of three shipped apps, so you can check that claim. (2026-10-05) - [F-Droid and what it means to own your data](https://oxisoft.io/blog/fdroid-own-your-data/): Owning your data is not a setting you switch on. It starts with where the app came from, what it stores, and whether it needs an account at all. (2026-09-28) - [One payment instead of a subscription: the honest tradeoff](https://oxisoft.io/blog/one-payment-instead-of-subscription/): Habit Observer sells one PRO unlock instead of a monthly plan. Here is what that choice costs us, what it gives the user, and when it is wrong. (2026-09-24) - [Your Android app should work without Google Play Services](https://oxisoft.io/blog/android-app-without-google-play-services/): Many Android apps quietly assume Google Play Services is installed. Here is what breaks when it is missing, and how to degrade instead of crash. (2026-09-20) - [Why Rust Is the Best Language for Vibe Coding](https://oxisoft.io/blog/rust-for-vibe-coding/): Vibe coding is only as safe as the thing checking the output. Rust ships the strictest checker in mainstream use, which makes it a surprisingly good fit for AI-written code. (2026-09-15) - [We Let an AI Agent Do QA on Real Hardware](https://oxisoft.io/blog/ai-agent-android-qa/): An AI agent tests our apps on a physical phone instead of an emulator. What it catches, what it costs, and where the approach stops being worth it. (2026-09-15) - [Triple Space Is Out on Google Play, With Nothing Attached](https://oxisoft.io/blog/triple-space-on-google-play/): Our space merge puzzle is live on Android. Merge three alike to build moons, planets and black holes. No ads, no tracking, no account, works offline. (2026-09-15) - [Why We Build with Go, Flutter, and Rust](https://oxisoft.io/blog/why-we-use-go-flutter-rust/): Go for backends and tools, Flutter for cross platform apps, Rust for the hot paths. Here is why each language earns its place in the work we ship. (2026-05-16) - [OxiType: the Typing Game That Makes You Faster by Accident](https://oxisoft.io/blog/oxitype-typing-game/): OxiType is a cyberpunk arcade typing game. Shoot down word-carrying alien ships, survive 80 levels, and get faster without ever opening a typing course. (2026-05-16) - [AI-Driven Development with Claude Code: A Security and Privacy Argument](https://oxisoft.io/blog/ai-driven-development-with-claude-code/): Why AI-assisted coding with Claude Code often produces more secure and privacy-respecting software than manual engineering, and where it doesn't. (2026-04-20) - [Why OxiSoft Apps Don't Track You](https://oxisoft.io/blog/why-we-dont-track-users/): Privacy-first app development isn't a feature you add. It's an architecture choice that rules out entire categories of revenue, SDKs, and convenience. (2026-04-14) ## Open Source MIT-licensed, free for commercial use. - [OXI Metric](https://github.com/oxisoft/oximetric): Self-hosted, privacy-first analytics platform for mobile, desktop, and web apps (Go). - [OXI Metric Flutter SDK](https://github.com/oxisoft/oximetric-flutter-sdk): Pure-Dart Flutter SDK that ships events to a self-hosted OXI Metric server (Dart). - [OxiWatch](https://github.com/oxisoft/oxiwatch): SSH login monitor for Debian-like Linux with Telegram alerts and geo-IP reports (Go). - [Config](https://github.com/oxisoft/config): Go package for loading and parsing JSON configuration with typed getters (Go). - [dd-test-disk](https://github.com/oxisoft/dd-test-disk): Zero-install one-liner disk performance benchmark for Unix-like systems (Shell). ## Contact - Email: info@oxisoft.io - Phone: +48 519 693 867 - Address: Przejsciowa 18, 15-505 Bialystok, Poland - Book a call: https://calendly.com/oxisoft-info/30min - Contact page: https://oxisoft.io/contact/ ## Optional - [llms-full.txt](https://oxisoft.io/llms-full.txt): Full content summary for LLM indexing. - Markdown: every app, blog and privacy page has a Markdown copy at index.md (also served for Accept: text/markdown).