# Collider.io vs Stack Fill

The clearest difference is in-app purchases: Stack Fill at none against Collider.io's 7. Stack Fill also leads on update cadence (every 3 days vs every 2 months). Collider.io's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Collider.io sells 7 one-off in-app purchases. Stack Fill asks for nothing beyond the download.

Collider.io ships an update every 2 months, Stack Fill every 3 days. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Collider.io | Stack Fill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/colliderio/id1435148731/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 193 MB | 104 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Sandor Tasnadi](https://appshunter.io/developer/1102198629) | [Huseyin Bener Bozkurt](https://appshunter.io/developer/1503888821) |

## What reviewers say

### Collider.io

[App page](https://appshunter.io/ios/app/colliderio/id1435148731)

Engage in thrilling 3D .io battles where survival is key. Collect items to enhance your power and become the last player standing in this competitive arena.

**Highlights:** 3D .io gameplay, Item collection, Power-up system, Last man standing survival, Competitive arena

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10Ball | $0.99 | one-time |
| 11Ball | $1.99 | one-time |
| 12ball | $2.99 | one-time |
| 13ball | $3.99 | one-time |
| 14ball | $4.99 | one-time |
| NoAds | $4.99 | one-time |
| 15Ball | $5.99 | one-time |


### Stack Fill

[App page](https://appshunter.io/ios/app/stack-fill/id6741890183)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Collider.io free?

Collider.io is free to download, with in-app purchases available.

### Is Stack Fill free?

Stack Fill is free to download, with no in-app purchases.

### Do Collider.io or Stack Fill have ads?

Stack Fill shows ads; Collider.io does not.

### Which is updated more often, Collider.io or Stack Fill?

Collider.io ships an update every 2 months, and Stack Fill every 3 days. Most recently, Collider.io was updated on November 2, 2026 and Stack Fill on October 28, 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.*