Comparison

Save Willis. vs Merge Keep

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Physics-based puzzle gameplay
  • Strategic cannon firing
  • Timed challenges
  • Progressive levels
  • Diver rescue objective
Features
Read full description

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.

About

Merge Keep

Features
Read full description

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

Save Willis.4 screens
Merge Keep4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Save Willis. ships an update weekly, Merge Keep every 2 days. Both last shipped on October 4, 2026.

Scorecard1 real difference · 9 level
Save Willis. versus Merge Keep: the parameters behind the verdict, then further details
ParameterSave Willis.Merge Keep
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyWeeklyEvery 2 days — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size267 MB76 MB
Age rating9+4+
DeveloperRobb Entertainment Interactive (REI) - robbent.comYigit Cirak

In-app purchases

None

Save Willis.

No in-app purchases

None

Merge Keep

No in-app purchases

Questions

Is Save Willis. free?
Save Willis. is free to download, with no in-app purchases.
Is Merge Keep free?
Merge Keep is free to download, with no in-app purchases.
Do Save Willis. or Merge Keep have ads?
Both Save Willis. and Merge Keep show ads.
Which is updated more often, Save Willis. or Merge Keep?
Save Willis. ships an update weekly, and Merge Keep every 2 days. Most recently, Save Willis. was updated on October 4, 2026 and Merge Keep on October 4, 2026.

Other comparisons