# World Flags Viewer vs Lumi Math Planet

The clearest difference is in-app purchases: World Flags Viewer at none against Lumi Math Planet's 1. Lumi Math Planet's advantage is ads (none vs shown) and update cadence (every 3 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Lumi Math Planet sells 1 one-off in-app purchase. World Flags Viewer asks for nothing beyond the download.

World Flags Viewer ships an update fortnightly, Lumi Math Planet every 3 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | World Flags Viewer | Lumi Math Planet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/world-flags-viewer/id6760290283/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 5 MB | 56 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) | [Guan Feng Lai](https://appshunter.io/developer/1136144960) |

## What reviewers say

### World Flags Viewer

[App page](https://appshunter.io/ios/app/world-flags-viewer/id6760290283)

Display national flags in fullscreen for sporting events or explore them by region. Features include interactive cheer modes with confetti and text overlays, plus offline access to a vast library of high-resolution flags.

**Highlights:** Fullscreen flag display, Interactive cheer modes, Country and region browsing, Favorite flag saving, Instant country search, High-resolution images

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

**In-app purchases:** none


### Lumi Math Planet

[App page](https://appshunter.io/ios/app/lumi-math-planet-explorer/id6778269699)

**Features:** macOS Compatibility, Family Sharing, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the Full Galaxy | $4.99 | one-time |


## Frequently asked questions

### Is World Flags Viewer free?

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

### Is Lumi Math Planet free?

Lumi Math Planet is free to download, with in-app purchases available.

### Do World Flags Viewer or Lumi Math Planet have ads?

World Flags Viewer shows ads; Lumi Math Planet does not.

### Which is updated more often, World Flags Viewer or Lumi Math Planet?

World Flags Viewer ships an update fortnightly, and Lumi Math Planet every 3 days. Most recently, World Flags Viewer was updated on October 25, 2026 and Lumi Math Planet on October 25, 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.*