Mermaid Testing vs Build An Island!
Mermaid Testing currently leads with 3,058 concurrent players against 1,481, a 2.1× advantage. On all-time peak the record belongs to Mermaid Testing at 3,842 concurrent players, versus 2,116. Momentum favours Mermaid Testing: +16.7% week over week versus -6.1% for Build An Island!. Lifetime, Mermaid Testing has more visits (681.4M vs 186.9M). Full side-by-side history for Mermaid Testing and Build An Island! is charted above.
Mermaid Testing 🥭
3,058
playing now
3,842 24h peak · 681.4M visits
VS
Build An Island! 🏝️
1,481
playing now
1,694 24h peak · 186.9M visits
Player count history
Mermaid TestingBuild An Island!
Head to head
| Metric | Mermaid Testing | Build An Island! | Difference |
|---|---|---|---|
| Playing now | 3,058 | 1,481 | 1,577 (2.1×) |
| 24h peak | 3,842 | 1,694 | 2,148 (2.3×) |
| 24h average | 2,921 | 1,414 | 1,507 (2.1×) |
| 7-day peak | 3,842 | 1,992 | 1,850 (1.9×) |
| 7-day average | 2,099 | 1,452 | 647 |
| 30-day peak | 3,842 | 1,992 | 1,850 (1.9×) |
| All-time peak | 3,842 | 2,116 | 1,726 (1.8×) |
| 24h change | ▲ 24.0% | ▲ 8.9% | — |
| 7d change | ▲ 16.7% | ▼ 6.1% | — |
| Total visits | 681.4M | 186.9M | 494.6M (3.6×) |
| Visits (24h) | 412.6K | 89.5K | 323.2K (4.6×) |
| Visits (7d) | 2.3M | 737.5K | 1.5M (3.1×) |
| Favorites | 535K | 3.5M | 3M (6.6×) |
| Rating | 77.7% | 95.8% | — |
| Global rank (players) | #618 | #1,122 | of 8,283 |
| Trending score | 134.2 | -8.1 | — |
| Created | Oct 21, 2020 | Apr 15, 2025 | — |
| Genre | Roleplay & Avatar Sim | Simulation | — |
Other comparisons
Both games are sampled on the same schedule and plotted on a shared time axis, so the comparison is like for like. Peaks, averages and growth come from RoVitals's own recorded history — 12 days for Mermaid Testing, 12 for Build An Island!.