# Mega World vs ObservMemo

The clearest difference is price: Mega World at Free against ObservMemo's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Mega World is free to download; ObservMemo costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mega World ships an update fortnightly, ObservMemo every 3 weeks. The most recent releases landed on September 20, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Mega World | ObservMemo |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 124 MB | 178 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EasyAR](https://appshunter.io/developer/669026673) | [Liu ZhiRong](https://appshunter.io/developer/483400125) |

## What reviewers say

### Mega World

[App page](https://appshunter.io/ios/app/mega-world/id1613894248)

**Features:** macOS Compatibility

**In-app purchases:** none


### ObservMemo

[App page](https://appshunter.io/ios/app/observmemo/id6751184366)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mega World free?

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

### Is ObservMemo free?

ObservMemo costs $1.99, with no in-app purchases.

### Do Mega World or ObservMemo have ads?

Neither Mega World nor ObservMemo shows ads.

### Which is updated more often, Mega World or ObservMemo?

Mega World ships an update fortnightly, and ObservMemo every 3 weeks. Most recently, Mega World was updated on September 20, 2026 and ObservMemo on September 7, 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.*