# Flashcards World vs Say BOOM!

The clearest difference is price: Say BOOM! at Free against Flashcards World's $0.99. Say BOOM! also leads on update cadence (fortnightly vs every 24 months). Flashcards World's advantage is in-app purchases (none vs 6). On ads, device support and iOS requirement there is nothing between them.

Say BOOM! is free to download; Flashcards World costs $0.99 up front. Say BOOM! sells 6 one-off in-app purchases. Flashcards World asks for nothing beyond the download.

Flashcards World ships an update every 24 months, Say BOOM! fortnightly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Flashcards World | Say BOOM! |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/say-boom/id6757092258/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 22 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rima Anggraeni](https://appshunter.io/developer/1741239846) | [Things4Kids LLC](https://appshunter.io/developer/1862266661) |

## What reviewers say

### Flashcards World

[App page](https://appshunter.io/ios/app/flashcards-world/id6736733467)

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

**In-app purchases:** none


### Say BOOM!

[App page](https://appshunter.io/ios/app/say-boom/id6757092258)

This app introduces children to musical instruments through interactive learning. Kids can swipe through instrument photos, hear their names spoken, listen to real sounds, and record themselves to practice pronunciation. It offers a fun and educational way to build vocabulary and appreciation for music.

**Highlights:** Interactive instrument discovery, Clear pronunciation of instrument names, Real instrument sound samples, Speech recording and comparison, Over 80 instruments to explore, Offline functionality

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brass | $0.99 | one-time |
| Woodwinds | $0.99 | one-time |
| Percussion | $0.99 | one-time |
| Strings | $0.99 | one-time |
| World & Folk | $0.99 | one-time |
| All Instruments Bundle | $3.99 | one-time |


## Frequently asked questions

### Is Flashcards World free?

Flashcards World costs $0.99, with no in-app purchases.

### Is Say BOOM! free?

Say BOOM! is free to download, with in-app purchases available.

### Do Flashcards World or Say BOOM! have ads?

Neither Flashcards World nor Say BOOM! shows ads.

### Which is updated more often, Flashcards World or Say BOOM!?

Flashcards World ships an update every 24 months, and Say BOOM! fortnightly. Most recently, Flashcards World was updated on October 25, 2026 and Say BOOM! on October 30, 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.*