01 · THE PERSON

The apps and the writing come from the same desk.

My name is Yehor Kovalchuk. I build Android apps with Flutter and publish them under the name Nyxelium. There is no team, no content agency, and no separate writing department — when a guide on this site describes how a watering schedule should behave or why a Pomodoro timer helps you start rather than finish, it is describing a decision I had to make in code.

That is the reason this site exists at all. Building a plant-care app forces you to answer questions the Play Store listing has no room for: what happens when someone snoozes the same reminder four weeks running, whether a fixed interval is ever the right default, how much of a care history is useful before it becomes clutter. The guides are where those answers live.

You can see the code and the commit history on GitHub.

02 · THE PORTFOLIO

Six apps: three published, three in development.

Every app is Flutter, Android-first, and works without a connection for its core job.

  • Chrono — offline time tracker and Pomodoro timer. Categories, tags, analytics, CSV and calendar export, a home-screen widget, 11 languages. Live on Google Play.
  • Pocket Cult: Idle Dungeon — an idle dungeon-keeper game with 15 buildings, 10 minions, full offline progression and a prestige loop. No forced ads. Live on Google Play.
  • Mossby — plant care tracker with light-aware placement advice, watering forecasts, zones and pots, and a pairing check that warns before two incompatible plants share a container. Live on Google Play.
  • Nuzzle — offline pet care: feeding, medication, grooming and vet reminders with a per-pet health timeline. In development.
  • Hexbrew: Idle Alchemy Witch — a cozy-gothic offline idle apothecary. In development.
  • Signet — local-first batch watermarking for photos. Nothing is uploaded. In development.

Three of these have public privacy policies published before release, which is why you will find policies on this site for apps you cannot install yet. The terms should be readable before anything ships, not after.

03 · METHOD

Search phrases choose the wording. They do not choose the answer.

Each guide starts from a real question someone asks before they install anything: whether an offline timesheet can survive an invoice dispute, whether a watering reminder should ever mean "water now," what actually happens to an idle game's progress while the app is closed.

The rules I hold myself to:

  • Every product claim is checked against the current build. If a feature changed, the guide changes.
  • No invented numbers. No download counts, no star ratings, no "trusted by thousands." If it cannot be substantiated, it is not on the page.
  • The app appears after the advice, not before it. A guide that only works if you install something is an advertisement wearing a guide's clothes.
  • Competitors get named honestly. Where a comparison exists, it says where my app loses. That is the only kind of comparison worth reading.

Plant care in particular deserves a caveat: the guides describe how to build an attentive routine, not species-specific horticulture. Follow the needs of the actual plant in front of you and adjust when its condition says the schedule is wrong.

04 · THE CONTRACT

Six requirements, checked before every release.

If a feature breaks one of these, the feature does not ship.

  • Offline-first. Core features work without a connection, and the content you create stays on your device.
  • No account needed. No sign-up, no login. Free versions show ads and use optional, consent-based analytics — both disclosed in the app's policy.
  • Zero friction. No forced onboarding, no dark patterns, no nagging notifications.
  • Localized. Translated so the apps feel native rather than imported.
  • Light and fast. Small downloads, smooth performance, accessible layouts in light and dark themes.
  • Fair pricing. Free to use, with honest optional upgrades — never a wall between you and the basics.

05 · CONTACT

Corrections are welcome, and they get made.

If something on this site is wrong, outdated, or describes a feature that no longer behaves the way it is written, tell me and I will fix the page. The same address handles app support, feature requests and privacy questions.