Rock.io™ vs Perfect Sum
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Rock.io™
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.
- Smash objects to grow
- Defeat other players
- Rock grows with destruction
- Destroy larger objects
- Satisfying gameplay
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The simplest, most satisfying game ever! To defeat other players at the decisive battle, smash as many things as you can! The rock grows as it destroys something, and it can destroy larger things. Smash other players, and break them into pieces!
Perfect Sum
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.
- Strategic shape placement
- Numbered board puzzles
- Unlockable buildings
- Increasing difficulty levels
- Rewarding animations
- Stunning visuals
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Welcome to Perfect Sum, a mesmerizing mobile game that combines the beauty of animation with the excitement of strategic gameplay! Place shapes on a numbered board to achieve the perfect sum, navigating through levels that range from deceptively simple to devilishly difficult. With every shape placed, you're not just solving a puzzle; you're painting a masterpiece of numbers and strategy. As you elevate your high score, you unlock a world of wonders, with new buildings revealing themselves, adding layers of depth to the gameplay and a sense of achievement that keeps you coming back for more. With stunning visuals, fluid animations, each moment in the game is designed to be a feast for the senses. From the satisfying click of placing a shape to the vibrant explosion of achieving the perfect sum, the game ensures every action feels rewarding.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Rock.io™ | Perfect Sum |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (15 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 2 |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.2 — better | 12.0 |
| Further details — not scored | ||
| Size | 194 MB | 139 MB |
| Age rating | 9+ | 4+ |
| Developer | Geisha Tokyo Inc. | Benjamin Richy |
Customer experience
Rock.io™
Perfect Sum
In-app purchases
Rock.io™
No in-app purchases
Perfect Sum
No in-app purchases
