## ⚠ Content Warning

This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here.

---

---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "DAS Calculator"
developer_entity: "Greg Fiumara"
bundle_id: "com.gregfiumara.dascalculator"
app_store_id: "354092306"
google_play_id: "apps.r.calculator"
category: "Medical"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: false
market_region: "US"
platforms: "iOS & Android"
app_last_updated: "2025-08-19"
report_date: "2026-04-16"
report_version: "1.13.3"
total_reviews: 93514
overall_rating: 4.45
confidence: "low"
confidence_score: 0.2
data_age_days: 21
momentum_velocity: "maintenance"
intelligence_version: 2
tags: ["medical", "free", "mobile app", "app review", "app analysis", "targets", "general", "users"]
canonical_url: "https://marlvel.ai/intel-report/medical/das-calculator"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# DAS Calculator App Audit

## TL;DR {#tldr}

- **Category**: Medical · Free
- **Signal**: Rating 4.45

> **TL;DR:** DAS Calculator is a medical app by Greg Fiumara, rated 4.45/5 by 93.5K users, available on iOS & Android.
>
> **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** DAS Calculator is a medical app by Greg Fiumara.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 4.45/5 (93.5K reviews) |
| **Category** | Medical |
| **Developer** | Greg Fiumara |
| **Pricing** | Free |
| **Platforms** | iOS & Android |
| **Confidence** | Low (0.2/1.0) |
| **Data Age** | 21d |

## Metadata & Market Performance
- **Publisher:** Greg Fiumara
- **Category:** Medical
- **Target Audience:** The app targets both general users requiring versatile mathematical tools and medical professionals managing Rheumatoid Arthritis patients.
- **Platforms:** iOS & Android
- **Version Audited:** 1.13.3
- **Audit Date:** 2026-04-16
- **Signal Count:** 2 reviews analyzed
- **Confidence:** Low (0.2/1.0)
- **App Store ID (iOS):** 354092306
- **Bundle ID:** com.gregfiumara.dascalculator
- **Google Play ID:** apps.r.calculator
- **Data Window:** Analysis based on signals collected up to 2026-04-16
- **Short Description:** Easy to use, stylish scientific calculator app.

<!-- section:executive-snapshot -->
## Executive Snapshot
DAS Calculator is a multi-functional tool marketed for both general mathematical tasks and clinical Rheumatoid Arthritis disease activity assessment. It provides a suite of calculators including scientific, basic, and graphing capabilities, while offering specialized functionality for calculating DAS scores in clinical settings.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] Scientific Calculator with History:** Performs complex operations like trigonometric, logarithmic, and exponential functions while tracking the last 100 expressions.
  * *User Intent:* Users want visibility into their own performance and progress.
- **[Standard] Basic Calculator:** Provides a user-friendly interface for standard arithmetic operations including addition, subtraction, multiplication, and division.
  * *User Intent:* Users seek social connection and competitive engagement with peers.
- **[Standard] DAS Score Calculation:** Enables medical professionals to calculate Rheumatoid Arthritis Disease Activity scores using various clinical variables.
  * *User Intent:* Users seek enhanced value through premium features.
- **[Standard] Wear OS Support:** Extends functionality to wearable devices for convenient access to calculations.
<!-- /section:features -->

## Monetization Strategy
- **Model:** Free

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

Last updated 240d ago. 5 versions tracked.

> **Cadence:** 5 total versions · 0 majors in last 6 months · 240 days since last update

<!-- /section:momentum -->

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

DAS Calculator is an established medical app that is completely free.
With a 4.45/5 rating from 93.5K reviews, it shows polarized user reception.

<!-- speakable-start -->
> **Bottom Line:** This app serves a dual purpose as a general-purpose scientific calculator and a specialized clinical tool for calculating Rheumatoid Arthritis disease activity.
<!-- speakable-end -->

**Best for:** The app targets both general users requiring versatile mathematical tools and medical professionals managing Rheumatoid Arthritis patients.

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

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

| Metric | Value |
| :--- | :--- |
| Overall Rating | 4.45/5 |
| Total Reviews | 93.5K |
| Confidence | Low |
| Pricing Model | Free |
| Platforms | iOS & Android |
| Key Features | 4 analyzed |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **DAS Calculator** (this app) | 4.45/5 | N/A | Greg Fiumara |
| [FHO+ Calc](https://marlvel.ai/intel-report/medical/ca-fhocalc-app) | N/A/5 | N/A | Manu Kaushik |
| [Beat Social Phobia with AJ](https://marlvel.ai/intel-report/medical/beat-social-phobia-with-aj) | 3.9/5 | Thrilled | Universal Relaxation Ltd |
| [Move On with AJ](https://marlvel.ai/intel-report/medical/move-on-with-aj) | 4.3/5 | Excited | Universal Relaxation Ltd |
| [NYC Employees PPO Plan](https://marlvel.ai/intel-report/medical/com-uhg-mobile-nyce) | 4.6/5 | N/A | United HealthCare Services, Inc. |
| [DeepScribe](https://marlvel.ai/intel-report/medical/deepscribe) | 4.0/5 | N/A | DeepScribe |

## Company Profile
- **Developer:** Greg Fiumara
- **Website:** [https://das.gregfiumara.com/](https://das.gregfiumara.com/)

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/das-calculator/id354092306?uo=4)
- **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=apps.r.calculator&hl=en&gl=us)
- **Dev Site:** [Official Website](https://das.gregfiumara.com/)
- **Sources:** App store metadata, User reviews.

## Related Intel Reports
- [*FHO+ Calc*](https://marlvel.ai/intel-report/medical/ca-fhocalc-app) (Manu Kaushik) — N/A Rating | N/A Sentiment
- [*Beat Social Phobia with AJ*](https://marlvel.ai/intel-report/medical/beat-social-phobia-with-aj) (Universal Relaxation Ltd) — 3.9/5 Rating | Excellent Sentiment
- [*Move On with AJ*](https://marlvel.ai/intel-report/medical/move-on-with-aj) (Universal Relaxation Ltd) — 4.3/5 Rating | Positive Sentiment
- [*NYC Employees PPO Plan*](https://marlvel.ai/intel-report/medical/com-uhg-mobile-nyce) (United HealthCare Services, Inc.) — 4.6/5 Rating | N/A Sentiment
- [*DeepScribe*](https://marlvel.ai/intel-report/medical/deepscribe) (DeepScribe) — 4.0/5 Rating | N/A Sentiment
- [*Dario Health*](https://marlvel.ai/intel-report/medical/dario-health) (LabStyle Innovation Ltd) — 4.8/5 Rating | Negative Sentiment
- [*Access - by McGraw Hill*](https://marlvel.ai/intel-report/medical/access-by-mcgraw-hill) (McGraw-Hill) — 3.9/5 Rating | N/A Sentiment
- [*Meu SUS Digital*](https://marlvel.ai/intel-report/medical/meu-sus-digital) (Servicos e Informacoes do Brasil) — 3.7/5 Rating | N/A Sentiment
- [*CRNA Nurse Anesthesia Review*](https://marlvel.ai/intel-report/medical/crna-nurse-anesthesia-review) (Higher Learning Technologies) — 4.7/5 Rating | N/A Sentiment
- [*Recognise Neck*](https://marlvel.ai/intel-report/medical/com-noigroup-recognise-neckv2) (noigroup) — 3.7/5 Rating | N/A Sentiment

## 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 and evidence quoting.
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:** 2
- **Data Sources:** user reviews, 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:** 21 days since last refresh

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