---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "NASA PVT+"
developer_entity: "NASA"
bundle_id: "gov.nasa.arc.th.NASA-PVT"
app_store_id: "1146834402"
google_play_id: "gov.nasa"
category: "Health & Fitness"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: true
market_region: "US"
platforms: "iOS & Android"
app_last_updated: "2026-04-01"
report_date: "2026-04-03"
report_version: "1.5.7"
total_reviews: 118050
overall_rating: 4.32
sentiment: "Excited"
sentiment_score: 65
confidence: "high"
confidence_score: 0.85
data_age_days: 0
intelligence_version: 2
total_followers: 0
nemesis: "Readi"
competitor_count: 16
tags: ["health & fitness", "free", "excited sentiment", "mobile app", "app review", "app analysis", "researchers,", "scientists,", "organizations"]
canonical_url: "https://marlvel.ai/intel-report/health-fitness/nasa-pvt"
license: "CC-BY-NC 4.0"
---

# NASA PVT+ App Audit

> **TL;DR:** NASA PVT+ is a health & fitness app by NASA, rated 4.32/5 by 118,050 users, with Excited user sentiment (65/100), available on iOS & Android.
>
> **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence.

> **Key Insight:** NASA PVT+ maintains Excited user sentiment (4.32/5 from 118,050 reviews), with users consistently praising educational content.

## Metadata & Market Performance
- **Publisher:** NASA
- **Category:** Health & Fitness
- **Target Audience:** Researchers, scientists, and organizations in high-stakes, 24/7 operational fields (aviation, military, medical) requiring validated tools to study fatigue.
- **Platforms:** iOS & Android
- **Version Audited:** 1.5.7
- **Audit Date:** 2026-04-03
- **Signal Count:** 51 reviews analyzed
- **Confidence:** High (0.85/1.0)
- **App Store ID (iOS):** 1146834402
- **Bundle ID:** gov.nasa.arc.th.NASA-PVT
- **Google Play ID:** gov.nasa
- **Data Window:** Analysis based on signals collected up to 2026-04-03

## Strategic Synopsis
NASA PVT+ is a research-grade tool providing a validated Psychomotor Vigilance Test (PVT) to measure cognitive alertness and fatigue. It is specifically designed for high-stakes operational environments like aviation and military research. As a free, government-funded application, it serves as the scientific gold standard for fatigue studies, though it currently faces technical challenges regarding UI scaling and secondary feature stability.

## Feature Profile & User Intent
- **[Differentiator] Psychomotor Vigilance Test (PVT):** A validated, research-grade reaction-time test sensitive to sleep loss and circadian misalignment.
  * *User Intent:* Users want to quickly find relevant content or features.
- **[Differentiator] Aviation-Specific Study Framework:** Pre-set framework for tracking duty/off-duty cycles, fatigue countermeasures, and inflight rest.
  * *User Intent:* Users want visibility into their own performance and progress.
- **[Differentiator] Offline Data Collection:** Ability to conduct tests and collect data without a network connection.
  * *User Intent:* Users want uninterrupted access without internet dependency.
- **[Standard] Karolinska Sleepiness Scale (KSS):** Integrated self-reported sleepiness rating scale (1-9).

## Monetization Strategy
- **Model:** Free
- **Tiers:** Completely free for research use
- **Analysis:** The app is a non-profit, government-funded tool; there is no monetization, which builds high trust but may result in slower technical support compared to commercial rivals.

## 🟢 User Sentiment (High Confidence: 118,050 reviews)
- **Overall Rating:** 4.32/5
- **Platform Split:** iOS 4.8/5 (10 ratings) | Android 4.3/5 (118,040 ratings)
- **Overall Sentiment:** Excited

### Top Praises
- **Educational Content** | *Evidence:* "I have learnt many things in this app"

### Top Complaints (Impact Areas)
- **Mission Tracker Malfunctions** | *Evidence:* "Artemis II mission tracker very glitchy, unresponsive"
- **UI/UX and Scaling Issues** | *Evidence:* "sometimes thinks my phone resolution is enormous"

## SWOT Analysis

| **Strengths** | **Weaknesses** |
| :--- | :--- |
| • Scientific validation of the PVT protocol<br>• NASA brand authority and trust<br>• Specialized aviation study frameworks<br>• Completely free for all users | • UI scaling issues on Android devices<br>• Buggy secondary features (Artemis tracker)<br>• Slow update and patch cycles<br>• Lack of integration with consumer wearables |

| **Opportunities** | **Threats** |
| :--- | :--- |
| • Expansion into trucking and emergency service sectors<br>• Integration with HealthKit/Google Fit APIs<br>• Developing a simplified consumer version for alertness tracking<br>• Capturing market share from high-cost commercial fatigue tools | • Commercial rivals with superior UX and dashboards<br>• Market shift toward passive fatigue monitoring (HRV)<br>• Technical instability driving researchers to paid platforms<br>• Device fragmentation affecting Android performance |

## Competitive Landscape (AI-Analyzed)

> Competitive positioning identified by AI analysis of app features, category, and market signals.

### Nemesis (Closest Rival)
- **Readi** by Fatigue Science: The primary commercial rival providing scientifically validated fatigue prediction and reaction-based alertness tracking for military and industrial sectors.
- **FleetAlert** by Pulsar Informatics: Directly competes in the aviation sub-genre, providing fatigue risk management tools and alertness testing specifically for pilots and flight crews.
- **AlertMeter** by Predictive Safety SRP: A direct competitor for fitness-for-duty testing that uses reaction-based cognitive tasks to identify fatigue-related impairment.
- **Sleep 2 Peak** by Sleep-Wake Technologies: A validated reaction-time tool specifically designed to measure the impact of sleep deprivation on cognitive performance, mirroring the PVT protocol.

### Contenders (Strong Competitors)
| App | Developer | Why They Compete |
| :--- | :--- | :--- |
| Fatigue Meter | Pulsar Informatics | A specialized tool for aviation professionals to calculate fatigue risk scores based on duty schedules and sleep patterns. |
| Rise: Sleep & Energy Tracker | Rise Science | Uses circadian rhythm modeling and sleep debt tracking to predict peak alertness windows, targeting the same performance-conscious user base. |
| Cognitive Performance Test | Vitasign | Provides a suite of reaction and vigilance tests used in clinical and research settings to assess cognitive speed and accuracy. |
| Enlighten - Alertness Tracking | Enlighten | Focuses on tracking alertness levels through quick cognitive assessments to manage workplace safety and fatigue. |

### Same Space (Related Apps)
- **Timeshifter - Jet Lag Plan** by Timeshifter Inc.: Essential for the aviation and research ecosystem, focusing on circadian alignment and fatigue mitigation for long-haul travel.
- **Ethica** by Ethica Data: A research-grade data collection platform used for longitudinal health studies and ecological momentary assessments.
- **MetricWire** by MetricWire: A leading platform for researchers to collect behavioral and cognitive data via mobile devices, similar to NASA's study framework.
- **LogTen Pro Pilot Logbook** by Coradine Aviation Systems: The standard pilot logbook that often integrates with fatigue management tools to track duty hours and rest requirements.
- **Sleep Cycle** by Sleep Cycle AB: While more consumer-focused, it is the dominant player in sleep diary and quality tracking within the Health & Fitness category.

### New Kids on the Block (Emerging Competitors)
- **Welltory: Heart Rate Monitor** by Welltory Inc: Uses HRV-based readiness scores as a modern, passive alternative to active reaction-time testing for assessing fatigue.
- **Fit for Duty** by Fit For Duty LLC: A rising tool in the industrial safety space focusing on pre-shift cognitive assessment and fatigue monitoring.
- **Peak - Brain Training** by PopReach Corporation: Though gamified, its focus on mental agility and reaction speed metrics attracts users interested in cognitive performance monitoring.

## Pros & Cons

**Pros:**
- Educational Content

**Cons:**
- Mission Tracker Malfunctions
- UI/UX and Scaling Issues

## Bottom Line
NASA PVT+ is a well-received health & fitness app that is completely free.
With a 4.32/5 rating from 118,050 reviews, it consistently earns user praise.

**Best for:** Researchers, scientists, and organizations in high-stakes, 24/7 operational fields (aviation, military, medical) requiring validated tools to study fatigue.

## Frequently Asked Questions

**Q: Is NASA PVT+ free?**
A: Yes, NASA PVT+ is completely free to download and use.

**Q: What do users think of NASA PVT+?**
A: User sentiment is positive with a 4.32/5 average. Users praise: Educational Content. Common complaints: Mission Tracker Malfunctions, UI/UX and Scaling Issues.

**Q: What are NASA PVT+'s main features?**
A: Key features include Psychomotor Vigilance Test (PVT), Aviation-Specific Study Framework, Offline Data Collection, Karolinska Sleepiness Scale (KSS).

**Q: Who is NASA PVT+ for?**
A: Researchers, scientists, and organizations in high-stakes, 24/7 operational fields (aviation, military, medical) requiring validated tools to study fatigue.

**Q: Is NASA PVT+ available on iOS and Android?**
A: NASA PVT+ is available on iOS & Android.

**Q: Is NASA PVT+ worth it in 2026?**
A: NASA PVT+ is a well-received health & fitness app that is completely free. With a 4.32/5 rating from 118,050 reviews, it consistently earns user praise. Best for: Researchers, scientists, and organizations in high-stakes, 24/7 operational fields (aviation, military, medical) requiring validated tools to study fatigue..

**Q: What are the main competitors of NASA PVT+?**
A: The main competitors of NASA PVT+ include Readi, FleetAlert, AlertMeter, Sleep 2 Peak, Fatigue Meter, among others. Readi is the closest direct competitor — the primary commercial rival providing scientifically validated fatigue prediction and reaction-based alertness tracking for military and industrial sectors..

**Q: What are the best alternatives to NASA PVT+?**
A: Top alternatives to NASA PVT+ include Readi, FleetAlert, AlertMeter, Sleep 2 Peak. Each targets a similar audience in the health & fitness space.

## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Overall Rating | 4.32/5 |
| Total Reviews | 118,050 |
| Sentiment | Excited (65/100) |
| Confidence | High |
| Pricing Model | Free |
| Platforms | iOS & Android |
| Key Features | 4 analyzed |

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **NASA PVT+** (this app) | 4.32/5 | Excited | NASA |
| [Strava: Run, Bike, Walk](https://marlvel.ai/intel-report/health-fitness/strava-run-bike-walk) | 4.7/5 | Mixed | Strava, Inc. |
| [Taller AI: Height Maximizer](https://marlvel.ai/intel-report/health-fitness/taller-ai-height-maximizer) | 4.7/5 | Excited | Leadimize |
| [TallerTeen - Grow Taller Now](https://marlvel.ai/intel-report/health-fitness/tallerteen-grow-taller-now) | 4.6/5 | Excited | Viral App Developement LLC |
| [GoTall - Height Predictor](https://marlvel.ai/intel-report/health-fitness/gotall-height-predictor) | 4.6/5 | Excited | Super Viral Studio |
| [Avatran Soul](https://marlvel.ai/intel-report/health-fitness/avatran-soul) | N/A/5 | N/A | Avatran GmbH |

## Company Profile
- **Developer:** NASA
- **Website:** [https://hsi.arc.nasa.gov/groups/fatigue/projects/pvt.php](https://hsi.arc.nasa.gov/groups/fatigue/projects/pvt.php)

## Data Sources & Links
- **App Store:** [View on Apple Store](https://apps.apple.com/us/app/nasa-pvt/id1146834402?uo=4)
- **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=gov.nasa&hl=en&gl=us)
- **Dev Site:** [Official Website](https://hsi.arc.nasa.gov/groups/fatigue/projects/pvt.php)
- **Sources:** Developer website content, About us / company information, App store metadata, User reviews.

## Related Intel Reports
- [*Strava: Run, Bike, Walk*](https://marlvel.ai/intel-report/health-fitness/strava-run-bike-walk) (Strava, Inc.) — 4.7/5 Rating | Mixed Sentiment
- [*Taller AI: Height Maximizer*](https://marlvel.ai/intel-report/health-fitness/taller-ai-height-maximizer) (Leadimize) — 4.7/5 Rating | Positive Sentiment
- [*TallerTeen - Grow Taller Now*](https://marlvel.ai/intel-report/health-fitness/tallerteen-grow-taller-now) (Viral App Developement LLC) — 4.6/5 Rating | Positive Sentiment
- [*GoTall - Height Predictor*](https://marlvel.ai/intel-report/health-fitness/gotall-height-predictor) (Super Viral Studio) — 4.6/5 Rating | Positive Sentiment
- [*Avatran Soul*](https://marlvel.ai/intel-report/health-fitness/avatran-soul) (Avatran GmbH) — N/A Rating | N/A Sentiment
- [*evolum - Meditation & Yoga*](https://marlvel.ai/intel-report/health-fitness/evolum-meditation-yoga) (Evolum) — 4.7/5 Rating | Positive Sentiment
- [*Bubblic: Connect with people.*](https://marlvel.ai/intel-report/health-fitness/bubblic-connect-with-people) (Bubblic Inc.) — 4.7/5 Rating | Excellent Sentiment
- [*Mind - Méditations guidées*](https://marlvel.ai/intel-report/health-fitness/mind-m-ditations-guid-es) (MIND AND CIE) — 4.6/5 Rating | Mixed Sentiment
- [*Runmeter Running & Walking GPS*](https://marlvel.ai/intel-report/health-fitness/runmeter-running-walking-gps) (Abvio Inc.) — 4.7/5 Rating | Positive Sentiment
- [*Walkmeter Walking & Hiking GPS*](https://marlvel.ai/intel-report/health-fitness/walkmeter-walking-hiking-gps) (Abvio Inc.) — 4.5/5 Rating | Mixed Sentiment

## Methodology

This report was generated by Marlvel.ai's 3-stage AI intelligence pipeline:

1. **Feature & Positioning Extraction** — Analyzes app metadata, developer website content, and version history to identify key features, target audience, and competitive positioning.
2. **Sentiment Analysis** — Processes user reviews (minimum 5 reviews required) to extract praise themes, complaint themes, and overall sentiment with evidence quotes.
3. **Intelligence Synthesis** — Combines stages 1 & 2 with App Store rankings to produce SWOT analysis, executive summary, and actionable insights.

- **Confidence Score:** 0.85/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 51
- **Data Sources:** user reviews, developer website, company about page, 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:** 0 days since last refresh

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