# CosmoCalc vs Engagefully

The clearest difference is review sentiment: CosmoCalc at 100% against Engagefully's 13%. CosmoCalc also leads on rating (5.0 vs 3.1) and monetization model (free vs ad-supported). Engagefully's advantage is update cadence (every 3 weeks vs every 6 months) and ratings volume (37 vs 4). On price, ads, in-app purchases and device support there is nothing between them.

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

CosmoCalc holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Engagefully has 37 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of CosmoCalc's written reviews are positive against 13% of Engagefully's.

CosmoCalc ships an update every 6 months, Engagefully every 3 weeks. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CosmoCalc | Engagefully |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cosmocalc/id334569654/reviews)** | [3.1 (37 ratings)](https://appshunter.io/ios/app/engagefully/id1259447436/reviews) |
| Number of ratings | 4 | **37** |
| Positive reviews | **100.0% of reviews** | 12.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 1 MB | 83 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eli Rykoff](https://appshunter.io/developer/318275933) | [Results Direct](https://appshunter.io/developer/351907420) |

## What reviewers say

### CosmoCalc

[App page](https://appshunter.io/ios/app/cosmocalc/id334569654)

This app calculates astronomical distances and scales based on user-selected cosmological parameters. It offers a simple interface for astronomers, students, and enthusiasts to quickly determine various cosmic measurements.

**Highlights:** Select cosmological parameters (H0, Ωm, ΩΛ), Choose from common reference cosmologies, Calculate luminosity distance, Determine angular diameter distance, Calculate lookback time, Find age of the Universe, Compute comoving volume and critical density

**Features:** macOS Compatibility

**In-app purchases:** none


### Engagefully

[App page](https://appshunter.io/ios/app/engagefully/id1259447436)

This app enhances event experiences by providing year-round engagement, personalized content, and networking opportunities. It allows users to manage schedules, connect with colleagues, and access event resources, while administrators can customize branding and integrate with other systems.

**Highlights:** Personalized content delivery, Networking and messaging, Event schedule management, Session and speaker search, Attendee directory, Exhibitor information, Customizable branding

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CosmoCalc free?

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

### Is Engagefully free?

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

### Which has better reviews, CosmoCalc or Engagefully?

CosmoCalc is rated higher. CosmoCalc averages 5.0 out of 5 from 4 ratings, while Engagefully averages 3.1 from 37 ratings.

### Do CosmoCalc or Engagefully have ads?

Neither CosmoCalc nor Engagefully shows ads.

### Which is updated more often, CosmoCalc or Engagefully?

CosmoCalc ships an update every 6 months, and Engagefully every 3 weeks. Most recently, CosmoCalc was updated on October 6, 2026 and Engagefully on October 8, 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.*