# Mem vs Astro Invaders

The clearest difference is ratings volume: Mem at 7 against Astro Invaders's 1. On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Mem sells 1 one-off in-app purchase and Astro Invaders sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Mem against 5.0 for Astro Invaders. That said, the two scores are not equally well evidenced: Mem has 7 ratings behind it against 1, so its average is the more settled of the two.

Mem ships an update every 5 days, Astro Invaders weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Mem | Astro Invaders |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/mem-mur-re/id1660318432/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astro-invaders/id6751432275/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 109 MB | 110 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [Christepher Pryer](https://appshunter.io/developer/1660318434) | [Sang Yoon Lee](https://appshunter.io/developer/1639696646) |

## What reviewers say

### Mem

[App page](https://appshunter.io/ios/app/mem-mur-re/id1660318432)

This is a casual memory matching game for all ages that helps improve focus and memory. It features various shape themes and customizable difficulty levels to keep your brain sharp in a fun way.

**Highlights:** Memory pair matching, Shape recognition themes, Multiple game modes (Casual, Lockout, Challenge), Adjustable timer for difficulty, Focus and concentration enhancement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Astro Invaders

[App page](https://appshunter.io/ios/app/astro-invaders/id6751432275)

Experience an intense arcade space battle with simple controls. Upgrade your ship to rapidly grow stronger and defeat challenging bosses. Uncover a lasting story through 21 boss encounters.

**Highlights:** Simple movement and shooting controls, Intense space battles, Ship upgrades for rapid growth, 21 boss battles, Uncover a lasting story, Casual action and rail shooter mechanics

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Ad Skip | $0.99 | one-time |
| 10000 Bit Pack | $0.99 | one-time |
| Super Bit Pack | $1.99 | one-time |
| Mega Bit Pack | $2.99 | one-time |
| 50000 Bit Pack | $2.99 | one-time |
| 150000 Bit Pack | $4.99 | one-time |


## Frequently asked questions

### Is Mem free?

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

### Is Astro Invaders free?

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

### Which has better reviews, Mem or Astro Invaders?

Astro Invaders is rated higher. Mem averages 4.9 out of 5 from 7 ratings, while Astro Invaders averages 5.0 from 1 ratings.

### Do Mem or Astro Invaders have ads?

Both Mem and Astro Invaders show ads.

### Which is updated more often, Mem or Astro Invaders?

Mem ships an update every 5 days, and Astro Invaders weekly. Most recently, Mem was updated on November 3, 2026 and Astro Invaders on October 30, 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.*