# EnviroSpellathon vs FlagBuilder

The clearest difference is update cadence: FlagBuilder at every 10 days against EnviroSpellathon's every 6 weeks. EnviroSpellathon's advantage is iOS requirement (12.0 vs 15.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

EnviroSpellathon ships an update every 6 weeks, FlagBuilder every 10 days. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | EnviroSpellathon | FlagBuilder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (9 ratings)](https://appshunter.io/ios/app/flagbuilder-flag-puzzle/id6443924386/reviews)** |
| Number of ratings | — | **9** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | — | Free |
| Size | 112 MB | 32 MB |
| Requires iOS | **12.0** | 15.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EAD](https://appshunter.io/developer/796827636) | [Shape Labs AB](https://appshunter.io/developer/1535699607) |

## What reviewers say

### EnviroSpellathon

[App page](https://appshunter.io/ios/app/envirospellathon/id1179331407)

**In-app purchases:** none


### FlagBuilder

[App page](https://appshunter.io/ios/app/flagbuilder-flag-puzzle/id6443924386)

Test your knowledge of world flags by recreating them layer by layer. Select continents to focus your challenges and learn about countries presented in a random order. Correctly assemble each flag to win.

**Highlights:** Select continents for custom games, Recreate flags layer by layer, Randomized country order, Lifeline system for incorrect guesses, Progress tracking through correct answers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EnviroSpellathon free?

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

### Is FlagBuilder free?

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

### Do EnviroSpellathon or FlagBuilder have ads?

Neither EnviroSpellathon nor FlagBuilder shows ads.

### Which is updated more often, EnviroSpellathon or FlagBuilder?

EnviroSpellathon ships an update every 6 weeks, and FlagBuilder every 10 days. Most recently, EnviroSpellathon was updated on October 15, 2026 and FlagBuilder on October 16, 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.*