# NASA PVT+ vs Sproutkin

The clearest difference is update cadence: Sproutkin at every 6 days against NASA PVT+'s every 3 months. Sproutkin also leads on rating (5.0 vs 4.8). NASA PVT+'s advantage is ratings volume (10 vs 1) and iOS requirement (13.6 vs 18.0). 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.

Sproutkin holds the better App Store score, 5.0 against 4.8. 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.

NASA PVT+ ships an update every 3 months, Sproutkin every 6 days. The most recent releases landed on October 27, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | NASA PVT+ | Sproutkin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (10 ratings)](https://appshunter.io/ios/app/nasa-pvt-plus/id1146834402/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sproutkin/id6790715184/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free | Free |
| Size | 31 MB | 4 MB |
| Requires iOS | **13.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NASA](https://appshunter.io/developer/355542146) | [Addison Chung](https://appshunter.io/developer/6790715186) |

## 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


### Sproutkin

[App page](https://appshunter.io/ios/app/sproutkin/id6790715184)

This app helps new parents track baby activities like feeding, sleep, and diaper changes with a simple, private interface. It allows co-parents to merge logs without cloud accounts and provides insights into sleep patterns and consumable supplies.

**Highlights:** Log feeds, sleep, diapers, vitamins, baths, walks, tummy time, Customizable activity tracking, Co-parent log merging without cloud accounts, Detailed feed tracking with side memory, Sleep analytics: total sleep, estimated bedtime, night stretches, Consumables tracking for supplies, Customizable reminders

**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 Sproutkin free?

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

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

Sproutkin is rated higher. NASA PVT+ averages 4.8 out of 5 from 10 ratings, while Sproutkin averages 5.0 from 1 ratings.

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

Neither NASA PVT+ nor Sproutkin shows ads.

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

NASA PVT+ ships an update every 3 months, and Sproutkin every 6 days. Most recently, NASA PVT+ was updated on October 27, 2026 and Sproutkin on October 18, 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.*