# Rock.io™ vs Perfect Sum

The clearest difference is review sentiment: Perfect Sum at 100% against Rock.io™'s 33%. Perfect Sum also leads on rating (5.0 vs 3.3) and update cadence (every 3 days vs every 2 weeks). Rock.io™'s advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

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

Perfect Sum holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Rock.io™ has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 33% of Rock.io™'s written reviews are positive against 100% of Perfect Sum's.

Rock.io™ ships an update every 2 weeks, Perfect Sum every 3 days. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Rock.io™ | Perfect Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (15 ratings)](https://appshunter.io/ios/app/rockio/id1412000443/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/perfect-sum/id6477300117/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 194 MB | 139 MB |
| Requires iOS | **8.2** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Geisha Tokyo Inc.](https://appshunter.io/developer/304321146) | [Benjamin Richy](https://appshunter.io/developer/1636888789) |

## What reviewers say

### Rock.io™

[App page](https://appshunter.io/ios/app/rockio/id1412000443)

Engage in a satisfying battle by smashing objects to grow your rock. Destroy opponents and break them into pieces to become the ultimate victor. The larger your rock gets, the more powerful it becomes.

**Highlights:** Smash objects to grow, Defeat other players, Rock grows with destruction, Destroy larger objects, Satisfying gameplay

**In-app purchases:** none


### Perfect Sum

[App page](https://appshunter.io/ios/app/perfect-sum/id6477300117)

A captivating puzzle game where you strategically place shapes on a numbered board to reach a perfect sum. Unlock new buildings and enjoy stunning visuals and rewarding animations as you progress through increasingly challenging levels.

**Highlights:** Strategic shape placement, Numbered board puzzles, Unlockable buildings, Increasing difficulty levels, Rewarding animations, Stunning visuals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rock.io™ free?

Rock.io™ is free to download, with no in-app purchases.

### Is Perfect Sum free?

Perfect Sum is free to download, with no in-app purchases.

### Which has better reviews, Rock.io™ or Perfect Sum?

Perfect Sum is rated higher. Rock.io™ averages 3.3 out of 5 from 15 ratings, while Perfect Sum averages 5.0 from 2 ratings.

### Do Rock.io™ or Perfect Sum have ads?

Perfect Sum shows ads; Rock.io™ does not.

### Which is updated more often, Rock.io™ or Perfect Sum?

Rock.io™ ships an update every 2 weeks, and Perfect Sum every 3 days. Most recently, Rock.io™ was updated on November 2, 2026 and Perfect Sum on November 4, 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.*