# Asteroid Close Approach vs Learn MERN Stack

The clearest difference is update cadence: Asteroid Close Approach at every 4 weeks against Learn MERN Stack's every 4 months. Asteroid Close Approach also leads on price ($1.99 vs $3.99) and iOS requirement (14.0 vs 17). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Asteroid Close Approach costs $1.99 and Learn MERN Stack $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Asteroid Close Approach ships an update every 4 weeks, Learn MERN Stack every 4 months. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Asteroid Close Approach | Learn MERN Stack |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/learn-mern-stack-react-and-node/id1631792180/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 4 months |
| Monetization | Paid | Paid |
| Size | 34 MB | 181 MB |
| Requires iOS | **14.0** | 17 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Arpacore B.V.](https://appshunter.io/developer/1441928570) | [Shahbaz Khan](https://appshunter.io/developer/1479963383) |

## What reviewers say

### Asteroid Close Approach

[App page](https://appshunter.io/ios/app/asteroid-close-approach/id1562569488)

Get real-time updates on near-Earth asteroid close approaches, including dates, distances, and impact energies. Access NASA's Sentry database for collision predictions and use a built-in calculator to estimate asteroid mass and energy.

**Highlights:** Real-time asteroid data on Apple Watch, Comprehensive approach details, Access to NASA's Sentry database, Asteroid mass and energy calculator, Collision monitoring for the next century

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### Learn MERN Stack

[App page](https://appshunter.io/ios/app/learn-mern-stack-react-and-node/id1631792180)

Master full-stack web development using the MERN stack. Learn MongoDB, Express.js, React, and Node.js through structured lessons, interactive projects, and AI-powered coding assistance. Progress from beginner to building production-ready applications.

**Highlights:** MERN stack curriculum, JavaScript fundamentals, Node.js and Express.js, MongoDB and Mongoose, React components and hooks, AI-powered coding tutor, Interactive projects and quizzes

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

**In-app purchases:** none


## Frequently asked questions

### Is Asteroid Close Approach free?

Asteroid Close Approach costs $1.99, with no in-app purchases.

### Is Learn MERN Stack free?

Learn MERN Stack costs $3.99, with no in-app purchases.

### Do Asteroid Close Approach or Learn MERN Stack have ads?

Neither Asteroid Close Approach nor Learn MERN Stack shows ads.

### Which is updated more often, Asteroid Close Approach or Learn MERN Stack?

Asteroid Close Approach ships an update every 4 weeks, and Learn MERN Stack every 4 months. Most recently, Asteroid Close Approach was updated on October 9, 2026 and Learn MERN Stack on October 5, 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.*