---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "Rap Calculator"
developer_entity: "OOZEE TECHNOLOGIES"
bundle_id: "com.oozeetech.rapcalculator"
app_store_id: "1390539004"
category: "Business"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2021-09-21"
report_date: "2026-08-07"
last_verified: "2026-08-07T00:00:00.000Z"
report_version: "2.0.5"
total_reviews: 4
overall_rating: 3.3
confidence: "low"
confidence_score: 0.05
data_age_days: 25
momentum_velocity: "zombie"
intelligence_version: 3
tags: ["business", "free", "mobile app", "app review", "app analysis", "diamond", "industry", "professionals"]
canonical_url: "https://marlvel.ai/apps/rap-calculator"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# Rap Calculator Intelligence Report

## TL;DR {#tldr}

- **Category**: Business · Free
- **Signal**: Rating 3.25

> **TL;DR:** Rap Calculator is a business app by OOZEE TECHNOLOGIES, rated 3.25/5 by 4 users, available on iOS.
>
> **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** Rap Calculator is a business app by OOZEE TECHNOLOGIES.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 3.25/5 (4 reviews) |
| **Category** | Business |
| **Developer** | OOZEE TECHNOLOGIES |
| **Pricing** | Free |
| **Platforms** | iOS |
| **Confidence** | Low (0.05/1.0) |
| **Data Age** | 25d |

## Metadata & Market Performance
- **Publisher:** OOZEE TECHNOLOGIES
- **Category:** Business
- **Target Audience:** Diamond industry professionals including buyers, manufacturers, sellers, and brokers.
- **Platforms:** iOS
- **Version Reviewed:** 2.0.5
- **Report Date:** 2026-08-07
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0.05/1.0)
- **App Store ID (iOS):** 1390539004
- **Bundle ID:** com.oozeetech.rapcalculator
- **Performance Trend:** Declining
- **Data Window:** Analysis based on signals collected up to 2026-08-07

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** Rap Calculator is a business utility for diamond industry professionals to calculate diamond values and broker discounts on iOS.
**Why users hire it:** Users hire this app to perform quick, on-the-go diamond valuation calculations, but the reliance on manual price updates forces a high-effort workflow that modern tools avoid.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] Global Diamond Price Sync:** Fetches live diamond price lists from the global source via a manual update button.
  * *User Intent:* Users expect seamless access across multiple devices.
- **[Standard] Diamond Valuation Calculator:** Calculates diamond value based on shape, color, clarity, and carat parameters.
- **[Differentiator] Broker Discount Calculator:** Computes the net amount for brokers based on a user-defined percentage.
<!-- /section:features -->

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

Rap Calculator functions as a legacy utility in the Business category, with no major updates since 2021. The lack of recent development activity signals a stagnant position relative to modern, automated industry tools.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Free
- **Tiers:** Free
- **Analysis:** The app operates as a free utility with no visible subscription or in-app purchase gates.

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

**Core Strengths:**
- Broker discount calculator provides specialized utility for trade workflows

**Growth Levers:**
- Automated API-based price feeds would remove manual sync barriers


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

The app's competitive positioning has been downgraded from a niche professional tool to a legacy utility, reflecting its failure to modernize data-sync mechanisms.

**Overall trend**: Declining
**Compared at**: 2026-08-07

### High-impact changes
- **[Shifted] Legacy Positioning** (positioning)

### Medium-impact changes
- **[Shifted] Threat Landscape** (swot)

<!-- section:whats-new -->
## What's New

- **Latest (v2.0.5, 4 years ago):** Minor bug fixes.
<!-- /section:whats-new -->

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

- Quiet 4 years, no feature expansion.
- Maintenance-mode, last update September 2021.

> **Cadence:** 1 total versions · 0 majors in last 6 months · 1780 days since last update

<!-- /section:momentum -->

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

Rap Calculator is a business app that is completely free.
It holds a 3.25/5 rating from 4 reviews.

<!-- speakable-start -->
> **Bottom Line:** Rap Calculator provides a useful niche calculation tool, but its four-year update drought and manual sync requirement make it a high-churn risk, so the developer must prioritize automated data integration to remain relevant.
<!-- speakable-end -->

**Best for:** Diamond industry professionals including buyers, manufacturers, sellers, and brokers.

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

- [ ] [INVEST] Automate price-list syncing because manual updates are the top friction point → increase daily active usage
<!-- /section:pm-actions -->

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

The diamond industry is shifting toward real-time, API-integrated valuation tools, leaving static, manual-entry apps like Rap Calculator increasingly obsolete. Without an immediate pivot to automated data syncing, the app will continue to lose relevance as professional users migrate to more efficient, cloud-connected alternatives.

- 🔴 The four-year update gap signals the app is in maintenance-mode, which prevents it from adapting to modern, automated industry data standards.
<!-- /section:outlook -->

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

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

| Metric | Value |
| :--- | :--- |
| Overall Rating | 3.25/5 |
| Total Reviews | 4 |
| Confidence | Low |
| Pricing Model | Free |
| Platforms | iOS |
| Key Features | 3 analyzed |
| Trend | Declining |
| Outlook | Declining |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **Rap Calculator** (this app) | 3.25/5 | N/A | OOZEE TECHNOLOGIES |
| [Groupon Merchant](https://marlvel.ai/apps/groupon-merchant) | 3.0/5 | n/a | Groupon, Inc. |
| [긱톡 - 재택부업, 프리랜서, 단기알바 정보 플랫폼](https://marlvel.ai/apps/com-gigtalk-gigtalk) | 4.5/5 | N/A | Nextstep Inc. |
| [두란노](https://marlvel.ai/apps/app--971) | N/A/5 | N/A | Duranno |
| [쿠펀치](https://marlvel.ai/apps/coupang-app-coupunch) | 1.0/5 | N/A | Coupang Corp. |
| [아지트 - 함께 소통하는 업무용 커뮤니티](https://marlvel.ai/apps/app--797) | 3.0/5 | N/A | Kakao Corp. |

## Company Profile
- **Developer:** OOZEE TECHNOLOGIES

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/rap-calculator/id1390539004?uo=4)
- **Sources:** App store metadata.

## Related Intel Reports
- [*Groupon Merchant*](https://marlvel.ai/apps/groupon-merchant) (Groupon, Inc.) · 3.0/5 Rating
- [*긱톡 - 재택부업, 프리랜서, 단기알바 정보 플랫폼*](https://marlvel.ai/apps/com-gigtalk-gigtalk) (Nextstep Inc.) · 4.5/5 Rating
- [*두란노*](https://marlvel.ai/apps/app--971) (Duranno) · N/A Rating
- [*쿠펀치*](https://marlvel.ai/apps/coupang-app-coupunch) (Coupang Corp.) · 1.0/5 Rating
- [*아지트 - 함께 소통하는 업무용 커뮤니티*](https://marlvel.ai/apps/app--797) (Kakao Corp.) · 3.0/5 Rating
- [*シフオプ*](https://marlvel.ai/apps/shift-management-service-to-support-optimal-placem) (Recruit Co.,Ltd.) · N/A Rating
- [*아임히어 - 모바일 출결 관리 앱*](https://marlvel.ai/apps/com-imhere-client-student) (LFin) · 2.9/5 Rating
- [*카매니저 - 중고차 딜러전용 전국 매물공유 플랫폼*](https://marlvel.ai/apps/kr-co-autocafe-carmanager) (atonmobility appmaster) · 3.0/5 Rating
- [*금호고속 셔틀*](https://marlvel.ai/apps/kr-co-kumhobuslines-shuttle-route-passengernew) (kumhoexpress) · 2.1/5 Rating
- [*쿠팡이츠 배달 파트너*](https://marlvel.ai/apps/coupang-eats-delivery) (Coupang Corp.) · 2.6/5 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:** 0.05/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 0
- **Data Sources:** 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:** 25 days since last refresh

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