# NASA PVT+ vs Ballpark

The clearest difference is in-app purchases: NASA PVT+ at none against Ballpark's 1. NASA PVT+ also leads on device support (3 vs 1) and iOS requirement (13.6 vs 17.2). On price and ads there is nothing between them.

Both are free to download. Ballpark sells 1 in-app purchase, starting at $1.99 per month. NASA PVT+ asks for nothing beyond the download.

## The numbers

| Metric | NASA PVT+ | Ballpark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (10 ratings)](https://appshunter.io/ios/app/nasa-pvt-plus/id1146834402/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 31 MB | 2 MB |
| Requires iOS | **13.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [NICK BURRI](https://appshunter.io/developer/6792507441) |

## 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


### Ballpark

[App page](https://appshunter.io/ios/app/ballpark-macro-tracker/id6792507439)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ballpark AI | $1.99 | per month |


## Frequently asked questions

### Is NASA PVT+ free?

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

### Is Ballpark free?

Ballpark is free to download, with in-app purchases available.

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

Neither NASA PVT+ nor Ballpark shows ads.

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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.*