# Shells Puzzle Game vs Robot Go

The clearest difference is update cadence: Robot Go at fortnightly against Shells Puzzle Game's every 4 months. Robot Go also leads on iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Shells Puzzle Game sells 1 one-off in-app purchase and Robot Go sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Shells Puzzle Game ships an update every 4 months, Robot Go fortnightly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Shells Puzzle Game | Robot Go |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 204 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Claudio Souza Mattos](https://appshunter.io/developer/1774316937) | [Nox Interactive Technology Limited](https://appshunter.io/developer/1516145422) |

## What reviewers say

### Shells Puzzle Game

[App page](https://appshunter.io/ios/app/shells-puzzle-game/id6475581633)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Robot Go

[App page](https://appshunter.io/ios/app/robot-go-zombies-war/id6476841939)

Lead a squad of five unique combat robots against a zombie apocalypse in this strategic RPG. Upgrade your robots, collect powerful gear, and defend your town in a thrilling tower defense experience.

**Highlights:** Form a 5-robot squad, One-click robot upgrades, Gacha system for robot unlocks, Idle gameplay with offline rewards, Automation mode for hack and slash

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Elite Battle Order | $4.99 | one-time |
| Collection Battle Order | $14.99 | one-time |
| Chapter 23 Gift Pack | $29.99 | one-time |
| Chapter 22 Gift Pack | $29.99 | one-time |
| Chapter 26 Gift Pack | $29.99 | one-time |
| Chapter 25 Gift Pack | $29.99 | one-time |
| Chapter 27 Gift Pack | $29.99 | one-time |
| Chapter 28 Gift Pack | $29.99 | one-time |
| Chapter 29 Gift Pack | $29.99 | one-time |
| Chapter 30 Gift Pack | $29.99 | one-time |


## Frequently asked questions

### Is Shells Puzzle Game free?

Shells Puzzle Game is free to download, with in-app purchases available.

### Is Robot Go free?

Robot Go is free to download, with in-app purchases available.

### Do Shells Puzzle Game or Robot Go have ads?

Both Shells Puzzle Game and Robot Go show ads.

### Which is updated more often, Shells Puzzle Game or Robot Go?

Shells Puzzle Game ships an update every 4 months, and Robot Go fortnightly. Most recently, Shells Puzzle Game was updated on October 27, 2026 and Robot Go on October 24, 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.*