# Robo Flags. vs WorldHeritage Study

The clearest difference is in-app purchases: Robo Flags. at none against WorldHeritage Study's 1. Robo Flags. also leads on update cadence (every 4 months vs every 48 months). WorldHeritage Study's advantage is iOS requirement (8.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. WorldHeritage Study sells 1 one-off in-app purchase. Robo Flags. asks for nothing beyond the download.

Robo Flags. ships an update every 4 months, WorldHeritage Study every 48 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Robo Flags. | WorldHeritage Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 months** | Every 48 months |
| Size | 59 MB | 517 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [SOFTHEAVEN](https://appshunter.io/developer/588713602) |

## What reviewers say

### Robo Flags.

[App page](https://appshunter.io/ios/app/robo-flags/id675525282)

**Features:** Vision Pro support

**In-app purchases:** none


### WorldHeritage Study

[App page](https://appshunter.io/ios/app/worldheritage-study/id1190468022)

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is Robo Flags. free?

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

### Is WorldHeritage Study free?

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

### Do Robo Flags. or WorldHeritage Study have ads?

Both Robo Flags. and WorldHeritage Study show ads.

### Which is updated more often, Robo Flags. or WorldHeritage Study?

Robo Flags. ships an update every 4 months, and WorldHeritage Study every 48 months. Most recently, Robo Flags. was updated on October 2, 2026 and WorldHeritage Study on October 6, 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.*