Save Willis. vs Merge Keep
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Save Willis.
Guide a diver to safety by strategically firing a cannon to push buttons and release him from water tanks. Solve physics-based puzzles before his oxygen runs out to progress through increasingly challenging levels.
- Physics-based puzzle gameplay
- Strategic cannon firing
- Timed challenges
- Progressive levels
- Diver rescue objective
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Willis is a diver that is trapped inside a water tank. The player has to free him before Willis’ oxygen runs out. The only way to free him is by pushing the red buttons placed inside the tank, and to do so the player must fire a cannon to cut the wires that hold these heavy wrecking balls. The wrecking balls are the only objects that are heavy enough to push those red buttons. Once all of the red buttons are pushed, Willis heads to the next water tank until he is finally free and safe.
Merge Keep
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Merge Keep is a unique fusion of puzzle gameplay and tower defense, where players merge units to form stronger shapes that battle against endless waves of enemies. The game tests players' strategic skills as they combine shapes, allocate resources wisely, and defend their grid from incoming threats.
Screenshots
Verdict
The clearest difference is update cadence: Merge Keep at every 2 days against Save Willis.'s weekly. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Save Willis. ships an update weekly, Merge Keep every 2 days. Both last shipped on October 4, 2026.
| Parameter | Save Willis. | Merge Keep |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 267 MB | 76 MB |
| Age rating | 9+ | 4+ |
| Developer | Robb Entertainment Interactive (REI) - robbent.com | Yigit Cirak |
In-app purchases
Save Willis.
No in-app purchases
Merge Keep
No in-app purchases









