# MemAide vs SkyORB ∞ Astronomy

The clearest difference is review sentiment: MemAide at 100% against SkyORB ∞ Astronomy's 0%. MemAide also leads on price (Free vs $2.99) and rating (5.0 vs 4.0). SkyORB ∞ Astronomy's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

MemAide is free to download; SkyORB ∞ Astronomy costs $2.99 up front. MemAide sells 2 one-off in-app purchases. SkyORB ∞ Astronomy asks for nothing beyond the download.

MemAide holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 100% of MemAide's written reviews are positive against 0% of SkyORB ∞ Astronomy's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | MemAide | SkyORB ∞ Astronomy |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/memaide/id1288409728/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/skyorb-astronomy/id1625985880/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 111 MB | 303 MB |
| Requires iOS | **12.1** | 15.6 |
| Devices | iPhone, iPad, iPod, Apple Watch | **iPhone, iPad, iPod, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [shaojun lin](https://appshunter.io/developer/1263579053) | [Stephane Denis](https://appshunter.io/developer/295455703) |

## What reviewers say

### MemAide

[App page](https://appshunter.io/ios/app/memaide/id1288409728)

This app helps you convert short-term memories into long-term knowledge through a managed daily study system. It's ideal for vocabulary building for exams or general knowledge accumulation, offering offline functionality and robust data security.

**Highlights:** Scheduled daily reviews, Text-to-speech enhancement, Input/output for data exchange, Quiz functionality, Photo and drawing integration, Offline data storage, Encrypted data protection

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GRE 5000 for MemAide Pro | $2.99 | one-time |
| MemAide Premium | $5.99 | one-time |


### SkyORB ∞ Astronomy

[App page](https://appshunter.io/ios/app/skyorb-astronomy/id1625985880)

Explore the universe with an interactive 3D star map, real-time celestial positions, and a 14-day schedule of astronomical events. Identify stars and planets using augmented reality and access detailed information about celestial bodies.

**Highlights:** Interactive 3D star map, Real-time celestial positions, Augmented Reality (AR) identification, 14-day astronomical event schedule, Detailed planet and celestial body information, Time shift feature for celestial events

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MemAide free?

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

### Is SkyORB ∞ Astronomy free?

SkyORB ∞ Astronomy costs $2.99, with no in-app purchases.

### Which has better reviews, MemAide or SkyORB ∞ Astronomy?

MemAide is rated higher. MemAide averages 5.0 out of 5 from 4 ratings, while SkyORB ∞ Astronomy averages 4.0 from 1 ratings.

### Do MemAide or SkyORB ∞ Astronomy have ads?

Neither MemAide nor SkyORB ∞ Astronomy shows ads.

### Which is updated more often, MemAide or SkyORB ∞ Astronomy?

MemAide ships an update every 2 months, and SkyORB ∞ Astronomy every 2 months. Most recently, MemAide was updated on October 20, 2026 and SkyORB ∞ Astronomy on October 24, 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.*