# Planet Gravity vs Zombie Sudoku

The clearest difference is review sentiment: Zombie Sudoku at 100% against Planet Gravity's 25%. Zombie Sudoku also leads on update cadence (every 5 months vs every 14 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Planet Gravity ships an update every 14 months, Zombie Sudoku every 5 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Planet Gravity | Zombie Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zombie-sudoku/id6447004558/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 5 MB | 14 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [Jason Baxter](https://appshunter.io/developer/1539854551) |

## What reviewers say

### Planet Gravity

[App page](https://appshunter.io/ios/app/planet-gravity/id995682820)

Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.

**Highlights:** Select different planets for unique gravity, Observe pendulum collisions, Physics-based simulation, Educational planet facts, Interactive entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


### Zombie Sudoku

[App page](https://appshunter.io/ios/app/zombie-sudoku/id6447004558)

A unique twist on the classic Sudoku puzzle, this game replaces numbers with zombies. It challenges players to use visual thinking and logic to solve puzzles, offering multiple difficulty levels and hints.

**Highlights:** Zombie-themed Sudoku puzzles, Visual thinking challenges, Multiple difficulty levels, Hint system available, Timed gameplay, Single-player competition

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

Planet Gravity is free to download, with no in-app purchases.

### Is Zombie Sudoku free?

Zombie Sudoku is free to download, with no in-app purchases.

### Do Planet Gravity or Zombie Sudoku have ads?

Neither Planet Gravity nor Zombie Sudoku shows ads.

### Which is updated more often, Planet Gravity or Zombie Sudoku?

Planet Gravity ships an update every 14 months, and Zombie Sudoku every 5 months. Most recently, Planet Gravity was updated on November 1, 2026 and Zombie Sudoku on November 3, 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.*