---
title: "Vitalii Gryniuk — Publisher Overview"
type: publisher
publisher: "Vitalii Gryniuk"
publisher_slug: "vitalii-gryniuk"
canonical_url: "https://marlvel.ai/publishers/vitalii-gryniuk"
last_updated: 2026-04-24T08:46:28.223Z
source: Marlvel.ai
license: CC-BY-NC-4.0
citation: "Marlvel.ai — Vitalii Gryniuk Publisher Overview"
---
# Vitalii Gryniuk — Publisher Overview

> Equipping users with precise lunar and astronomical data for long-term celestial tracking and planning.

- **Publisher:** Vitalii Gryniuk
- **Website:** [https://apps.apple.com](https://apps.apple.com)
- **Overview generated:** 2026-04-24
- **License:** CC-BY-NC 4.0

## Executive summary

Vitalii Gryniuk has established a niche stronghold by focusing exclusively on high-precision lunar data rather than a broad weather portfolio. This single-app strategy prioritizes deep historical and future data sets, creating a utility-based moat that is difficult for generalist weather apps to replicate. The publisher's trajectory suggests a commitment to long-term maintenance and data integrity over aggressive portfolio expansion.

## Publisher DNA

- **Primary focus:** Astronomical and lunar tracking utilities
- **Scale:** indie
- **Target audience:** Individuals tracking lunar cycles for astronomical, professional, or personal planning purposes.

## Portfolio momentum

- **Velocity:** steady
- **Active apps:** 1
- **Abandoned apps:** 0
- **Last major release:** 42 days ago

Maintains a consistent development cadence with 4 releases in the last 6 months for the flagship title.

## Aggregated portfolio metrics

- **Total reviews (all apps):** 116,970
- **Weighted rating:** 4.82 / 5
- **Apps in portfolio:** 1

## Category breakdown

| Category | Apps | Share |
| :--- | :--- | :--- |
| Weather | 1 | 100% |

## Top apps

- **The Moon: Calendar Moon Phases** — Core flagship title with over 116,000 reviews and a 4.82 rating.

## Signature patterns

- Specialization in high-precision astronomical data sets
- Freemium monetization model focused on utility features
- Long-term data coverage spanning the years 0001 to 2100
- Consistent maintenance and update cadence for a single-app portfolio

## Bottom line

A highly focused indie publisher with clear dominance in the lunar tracking niche. The exceptional user sentiment across a massive review base indicates a mature product with significant market-fit and high user retention.

---
© 2026 Marlvel.ai | [Publisher apps index](https://marlvel.ai/api/llm/publishers/vitalii-gryniuk) | [Methodology](https://marlvel.ai/api/llm/methodology)
Data licensed under CC-BY-NC 4.0.

---
© 2026 Marlvel.ai | [Full publisher profile](https://marlvel.ai/publishers/vitalii-gryniuk) | [Publisher apps index](https://marlvel.ai/api/llm/publishers/vitalii-gryniuk) | [Methodology](https://marlvel.ai/api/llm/methodology)
Data licensed under CC-BY-NC 4.0.