---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "Koyomi"
developer_entity: "iWare Inc."
bundle_id: "jp.co.iwares.koyomi"
app_store_id: "926113841"
category: "Lifestyle"
primary_platform: "ios"
primary_monetization: "Paid"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2024-03-15"
report_date: "2026-08-13"
last_verified: "2026-08-13T00:00:00.000Z"
report_version: "1.7.0"
total_reviews: 2
overall_rating: 5
confidence: "low"
confidence_score: 0.2
data_age_days: 3
intelligence_version: 3
tags: ["lifestyle", "paid", "mobile app", "app review", "app analysis", "japanese", "users", "individuals"]
canonical_url: "https://marlvel.ai/apps/koyomi"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# Koyomi Intelligence Report

## TL;DR {#tldr}

- **Category**: Lifestyle · Paid
- **Signal**: Rating 5

> **TL;DR:** Koyomi is a lifestyle app by iWare Inc., rated 5/5 by 2 users, available on iOS.
>
> **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** Koyomi is a lifestyle app by iWare Inc..
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 5/5 (2 reviews) |
| **Category** | Lifestyle |
| **Developer** | iWare Inc. |
| **Pricing** | Paid |
| **Platforms** | iOS |
| **Confidence** | Low (0.2/1.0) |
| **Data Age** | 3d |

## Metadata & Market Performance
- **Publisher:** iWare Inc.
- **Category:** Lifestyle
- **Target Audience:** Japanese users or individuals interested in traditional Japanese calendar markers who want to integrate cultural dates with their standard iOS schedule.
- **Platforms:** iOS
- **Version Reviewed:** 1.7.0
- **Report Date:** 2026-08-13
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0.2/1.0)
- **App Store ID (iOS):** 926113841
- **Bundle ID:** jp.co.iwares.koyomi
- **Performance Trend:** Mixed
- **Data Window:** Analysis based on signals collected up to 2026-08-13

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** Koyomi is a lifestyle utility app for iOS and watchOS that integrates traditional Japanese calendar markers with standard personal schedules.
**Why users hire it:** Users hire Koyomi to align daily planning with traditional cultural markers like Rokuyo and zodiac phases, which standard calendar apps lack.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] Traditional Calendar Integration:** Reads and displays events from the iOS standard calendar alongside traditional Japanese calendar data.
- **[Differentiator] Cultural Calendar Data:** Displays specific Japanese calendar markers including Rokuyo, zodiac, lunar phases, and 24 solar terms.
- **[Differentiator] WatchOS Integration:** Extends calendar and date information to Apple Watch for quick-glance access.
<!-- /section:features -->

<!-- section:market-position -->
## Market Position {#market-position}

Koyomi holds a niche position in the Lifestyle category, maintaining a 5-star rating. Its $1.99 price point differentiates it from free, ad-supported calendar apps, though it lacks the frequent update cadence of category leaders.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Paid
- **Tiers:** One-time purchase at $1.99
- **Price:** iOS: $1.99
- **Analysis:** Paid model at $1.99 price point, targeting users seeking a specialized utility without recurring subscription costs.

<!-- section:swot -->
## SWOT Analysis {#swot}

**Core Strengths:**
- Specialized cultural data library functions as a barrier for users seeking traditional date-based guidance
- WatchOS integration increases session frequency via quick-glance access

**Growth Levers:**
- Untapped potential for education-based partnerships as a B2B distribution channel for traditional calendar data


<!-- /section:swot -->
## Recent Changes (v2 → v3) {#recent-changes}

The report now explicitly identifies the app as being in maintenance-mode with a fixed $1.99 price point, shifting the focus from feature parity to competitive vulnerability.

**Overall trend**: Mixed
**Compared at**: 2026-08-13

### High-impact changes
- **[Shifted] Maintenance-mode posture** (positioning)
- **[Added] Explicit pricing tier** (pricing)

### Medium-impact changes
- **[Improved] Feature status elevation** (features)
- **[Added] SWOT analysis inclusion** (swot)

<!-- section:momentum -->
## App Momentum (Steady) {#momentum}

- Ships only bug fix updates.
- Maintains stable 5-star rating.

<!-- /section:momentum -->

<!-- section:so-what -->
## The "So What?" (Strategic Takeaway) {#so-what}

Koyomi is a lifestyle app that is a paid app.
It holds a 5/5 rating from 2 reviews.

<!-- speakable-start -->
> **Bottom Line:** Koyomi secures a loyal niche through specialized cultural data integration, but its maintenance-mode update cadence leaves it exposed to modern competitors, so the PM should prioritize a feature refresh to defend its category position.
<!-- speakable-end -->

**Best for:** Japanese users or individuals interested in traditional Japanese calendar markers who want to integrate cultural dates with their standard iOS schedule.

<!-- section:pm-actions -->
### PM Action Plan (Next Best Moves)

- [ ] [MAINTAIN] Audit the current feature set because the lack of recent updates risks user churn to more active calendar rivals → maintain category relevance.
<!-- /section:pm-actions -->

<!-- section:outlook -->
### Outlook: Stable

The lifestyle calendar market is consolidating around apps with high-frequency update cycles and social sharing features. Koyomi's maintenance-mode posture leaves it exposed to competitors who can more rapidly integrate new iOS features, so the PM must decide if a feature refresh is viable to avoid long-term stagnation.

- ⚪ Recent updates focused on stability, no feature expansion.
- 🟢 High user rating indicates strong product-market fit for the existing niche audience.
<!-- /section:outlook -->

<!-- /section:so-what -->

<!-- section:metrics -->
## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Overall Rating | 5/5 |
| Total Reviews | 2 |
| Confidence | Low |
| Pricing Model | Paid |
| Platforms | iOS |
| Key Features | 3 analyzed |
| Trend | Mixed |
| Outlook | Stable |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **Koyomi** (this app) | 5/5 | N/A | iWare Inc. |
| [Alarmy - Loud alarm clock](https://marlvel.ai/apps/alarmy-loud-alarm-clock) | 4.8/5 | Excited | Delight Room Co., Ltd. |
| [Tinder Dating App: Date & Chat](https://marlvel.ai/apps/tinder-dating-app-date-chat) | 4.0/5 | n/a | Tinder LLC |
| [Alarmie: Easy Rise Alarm Clock](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) | 4.4/5 | Mixed | Jintian Wang |
| [AlarmMon ( alarm clock )](https://marlvel.ai/apps/alarmmon-alarm-clock) | 4.3/5 | n/a | Malang Studio Co. Ltd, |
| [Journey - Diary, Journal](https://marlvel.ai/apps/com-journey-ios-app) | 4.6/5 | Excited | Two App Studio Pte. Ltd. |

## Company Profile
- **Developer:** iWare Inc.
- **Website:** [https://www.iwares.co.jp/en/](https://www.iwares.co.jp/en/)

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/koyomi/id926113841?uo=4)
- **Dev Site:** [Official Website](https://www.iwares.co.jp/en/)
- **Sources:** Developer website content, App store metadata.

## Related Intel Reports
- [*Alarmy - Loud alarm clock*](https://marlvel.ai/apps/alarmy-loud-alarm-clock) (Delight Room Co., Ltd.) · 4.8/5 Rating | Positive Sentiment
- [*Tinder Dating App: Date & Chat*](https://marlvel.ai/apps/tinder-dating-app-date-chat) (Tinder LLC) · 4.0/5 Rating
- [*Alarmie: Easy Rise Alarm Clock*](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) (Jintian Wang) · 4.4/5 Rating
- [*AlarmMon ( alarm clock )*](https://marlvel.ai/apps/alarmmon-alarm-clock) (Malang Studio Co. Ltd,) · 4.3/5 Rating
- [*Journey - Diary, Journal*](https://marlvel.ai/apps/com-journey-ios-app) (Two App Studio Pte. Ltd.) · 4.6/5 Rating | Positive Sentiment
- [*Swiftime*](https://marlvel.ai/apps/swiftime) (MEDIANO Co.,Ltd.) · 4.5/5 Rating | Positive Sentiment
- [*마주*](https://marlvel.ai/apps/an-offline-network-where-you-meet-through-qr-codes) (lvher) · N/A Rating
- [*모앗*](https://marlvel.ai/apps/moat-moatapp) (JUNSEOK LEE) · N/A Rating
- [*야기*](https://marlvel.ai/apps/tistory-88yhtserof-yagi) (Yunhwi Lim) · N/A Rating
- [*책력*](https://marlvel.ai/apps/ryubi-chaengnyeok) (jeongrim oh) · N/A Rating

## Methodology {#methodology}

This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline:

1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps.
2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks.
3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes).
4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category.
5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights.

- **Confidence Score:** 0.2/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 0
- **Data Sources:** developer website, App Store metadata
- **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform
- **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence.
- **Report Age:** 3 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/koyomi)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.