# FlagMasterPlus vs Knowster

The clearest difference is iOS requirement: Knowster at 15.1 against FlagMasterPlus's 17.0. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. FlagMasterPlus sells 1 one-off in-app purchase and Knowster sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for FlagMasterPlus against 5.0 for Knowster. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | FlagMasterPlus | Knowster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/flagmasterplus/id6760335357/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/knowster-world-quiz-duel/id6761371636/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 29 MB | 55 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hayri Odabas](https://appshunter.io/developer/1883951024) | [Mahdi Aouas](https://appshunter.io/developer/1889177257) |

## What reviewers say

### FlagMasterPlus

[App page](https://appshunter.io/ios/app/flagmasterplus/id6760335357)

Test your geography knowledge by identifying country flags from around the world. Compete against the clock, earn combos, and challenge other players in real-time PvP matches. Unlock achievements and climb global leaderboards.

**Highlights:** 194 country flags to identify, 5 difficulty levels, Race against time with combos, Hint system, 1v1 real-time online matches, Global leaderboards, Daily challenges and achievements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theme Pack | $0.99 | one-time |


### Knowster

[App page](https://appshunter.io/ios/app/knowster-world-quiz-duel/id6761371636)

Engage in live, real-time quiz duels against players worldwide, representing your country. Test your knowledge across various categories in multiple languages and compete in team battles or challenge friends.

**Highlights:** Live, real-time quiz duels, Play for your country on leaderboards, 18,000+ questions in 10 languages, Challenge friends and family, 5v5 Clan Wars, ELO matchmaking and tournaments, Daily challenges and rewards

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Coins | $0.99 | one-time |
| 1500 Coins | $2.49 | one-time |
| Premium 1 Month | $4.99 | one-time |
| 4000 Coins | $4.99 | one-time |
| 10000 Coins | $9.99 | one-time |
| Premium 3 Months | $11.99 | one-time |
| Premium 1 Year | $39.99 | one-time |


## Frequently asked questions

### Is FlagMasterPlus free?

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

### Is Knowster free?

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

### Which has better reviews, FlagMasterPlus or Knowster?

FlagMasterPlus and Knowster are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do FlagMasterPlus or Knowster have ads?

Neither FlagMasterPlus nor Knowster shows ads.

### Which is updated more often, FlagMasterPlus or Knowster?

FlagMasterPlus ships an update every 5 days, and Knowster every 5 days. Most recently, FlagMasterPlus was updated on October 15, 2026 and Knowster on October 12, 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.*