# Who's in Space? vs ReefCtrl

The clearest difference is rating: Who's in Space? at 3.0 against ReefCtrl's 1.5. ReefCtrl's advantage is update cadence (every 9 days vs every 4 months). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Who's in Space? holds the better App Store score, 3.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Who's in Space? ships an update every 4 months, ReefCtrl every 9 days. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Who's in Space? | ReefCtrl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/whos-in-space/id916499517/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/reefctrl/id6769832090/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 0 MB | 3 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cameron Bernhardt](https://appshunter.io/developer/916499516) | [Jayanth Vignesh Ramachandran](https://appshunter.io/developer/1896691974) |

## What reviewers say

### Who's in Space?

[App page](https://appshunter.io/ios/app/whos-in-space/id916499517)

Discover the current number of astronauts in orbit and their locations. Tap on an astronaut's name to access more detailed information about their mission.

**Highlights:** Real-time astronaut count, Astronaut location tracking, Detailed astronaut information, Data from Open Notify Astros API, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### ReefCtrl

[App page](https://appshunter.io/ios/app/reefctrl/id6769832090)

Manage your reef aquarium with this intelligent platform. Monitor equipment, track water chemistry, and receive smart alerts. It integrates with Neptune Apex controllers and offers AI-powered assistance for hobbyists.

**Highlights:** Neptune Apex integration, Smart alerts and notifications, Water chemistry tracking, Dosing management, AI reef assistant, Equipment and livestock management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Who's in Space? free?

Who's in Space? is free to download, with no in-app purchases.

### Is ReefCtrl free?

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

### Which has better reviews, Who's in Space? or ReefCtrl?

Who's in Space? is rated higher. Who's in Space? averages 3.0 out of 5 from 2 ratings, while ReefCtrl averages 1.5 from 2 ratings.

### Do Who's in Space? or ReefCtrl have ads?

Neither Who's in Space? nor ReefCtrl shows ads.

### Which is updated more often, Who's in Space? or ReefCtrl?

Who's in Space? ships an update every 4 months, and ReefCtrl every 9 days. Most recently, Who's in Space? was updated on October 26, 2026 and ReefCtrl on October 21, 2026.

---

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