# NASA PVT+ vs Lugna

The clearest difference is rating: NASA PVT+ at 4.8 against Lugna's 2.0. NASA PVT+ also leads on review sentiment (25% vs 0%) and ratings volume (10 vs 1). Lugna's advantage is update cadence (weekly vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NASA PVT+ holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: NASA PVT+ has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 25% of NASA PVT+'s written reviews are positive against 0% of Lugna's.

NASA PVT+ ships an update every 3 months, Lugna weekly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | NASA PVT+ | Lugna |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (10 ratings)](https://appshunter.io/ios/app/nasa-pvt-plus/id1146834402/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/lugna/id1538556393/reviews) |
| Number of ratings | **10** | 1 |
| Positive reviews | **25.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | Free |
| Size | 31 MB | 16 MB |
| Requires iOS | **13.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [Rayhan Faluda](https://appshunter.io/developer/1518560920) |

## What reviewers say

### NASA PVT+

[App page](https://appshunter.io/ios/app/nasa-pvt-plus/id1146834402)

This app provides a validated tool for conducting psychomotor vigilance tests, crucial for sleep, alertness, and performance research. It offers multiple study frameworks, including simple tests, basic multi-day studies, and specialized aviation research protocols.

**Highlights:** Psychomotor Vigilance Test (PVT), Karolinska Sleepiness Scale (KSS), Sleep Diary, Simple PVT mode, Basic Study framework, Aviation Study framework

**Features:** Vision Pro support

**In-app purchases:** none


### Lugna

[App page](https://appshunter.io/ios/app/lugna/id1538556393)

This guided journaling app helps you express thoughts and feelings through typing, speaking, or writing with a stylus. It provides insights into your well-being over time and offers daily reminders to encourage consistent journaling. Enhanced privacy is available with PIN and biometric app lock.

**Highlights:** Guided journaling with prompts, Speech-to-text and stylus input, Mood tracking and statistics, Customizable journaling reminders, PIN and biometric app lock

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NASA PVT+ free?

NASA PVT+ is free to download, with no in-app purchases.

### Is Lugna free?

Lugna is free to download, with no in-app purchases.

### Which has better reviews, NASA PVT+ or Lugna?

NASA PVT+ is rated higher. NASA PVT+ averages 4.8 out of 5 from 10 ratings, while Lugna averages 2.0 from 1 ratings.

### Do NASA PVT+ or Lugna have ads?

Neither NASA PVT+ nor Lugna shows ads.

### Which is updated more often, NASA PVT+ or Lugna?

NASA PVT+ ships an update every 3 months, and Lugna weekly. Most recently, NASA PVT+ was updated on November 2, 2026 and Lugna on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*