klang² vs Play4
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
klang²
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20 sound squares turn your ears upside down. Which bird sings? Which composer sounds? Can you put proverbs together and recognize foreign languages? Place your smartphone with the klang² app open in the middle of the table, place a sound square on the reader and listen carefully: Off you go with your acoustic game collection! ATTENTION: This app only works together with 20 sound squares, which are available via klang2.com.
Play4
Engage with interactive stories to combat sexist hate speech rooted in stereotypes and gender discrimination. Choose to play as Mary, Zack, or Betty and explore their unique narratives.
- Interactive storytelling
- Multiple character perspectives
- Combats sexist hate speech
- Educational content
- Stereotype and discrimination themes
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Play4 aims at fighting sexist hate speech coming from stereotypes and gender discrimination: take the role of Mary, Zack or Betty and discover their stories! Play4 was funded by the Erasmus program of the EU.
Screenshots
Verdict
The clearest difference is in-app purchases: Play4 at none against klang²'s 10. Play4 also leads on iOS requirement (11.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. klang² sells 10 one-off in-app purchases. Play4 asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.
| Parameter | klang² | Play4 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 89 MB | 99 MB |
| Age rating | 4+ | 9+ |
| Developer | Oberlin & Rennertz GmbH | SCS Centro Zaffiria |
In-app purchases
klang²
- Klang2 Pro Option 0Free
- Klang2 Pro Option 1$0.99
- Bundesländer und Hauptstädte$0.99
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- Klang2 Pro Option 2$1.99
- Klang2 Pro Option 3$3.99
- Volkslieder Premium$3.99
- Tierisch Menschlich$3.99
- Klang2 Pro Option 4$7.99
- Klang2 Pro Option 5$11.99
- Klang2 Pro Option 6$16.99
Play4
No in-app purchases
