# Water Power! vs Engine Pistons ASMR

The clearest difference is ratings volume: Water Power! at 26K against Engine Pistons ASMR's 1.9K. Engine Pistons ASMR's advantage is update cadence (weekly vs fortnightly). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Water Power! sells 21 in-app purchases, starting at $4.99 per month and Engine Pistons ASMR sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Water Power! against 4.6 for Engine Pistons ASMR. That said, the two scores are not equally well evidenced: Water Power! has 26K ratings behind it against 1.9K, so its average is the more settled of the two. Written reviews are what separate them: 21% of Water Power!'s written reviews are positive against 15% of Engine Pistons ASMR's.

Water Power! ships an update fortnightly, Engine Pistons ASMR weekly. Both last shipped on October 27, 2026.

## The numbers

| Metric | Water Power! | Engine Pistons ASMR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (26K ratings)](https://appshunter.io/ios/app/water-power/id1659387585/reviews)** | [4.6 (1.9K ratings)](https://appshunter.io/ios/app/engine-pistons-asmr/id1660464064/reviews) |
| Number of ratings | **26K** | 1.9K |
| Positive reviews | **21.5% of reviews** | 14.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 453 MB | 517 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Voodoo](https://appshunter.io/developer/714804730) | [Rollic Games](https://appshunter.io/developer/1452111779) |

## What reviewers say

### Water Power!

[App page](https://appshunter.io/ios/app/water-power/id1659387585)

Build and manage your own hydro empire by generating power with various water-based structures. Explore new worlds, upgrade your facilities with hired engineers, and automate production to grow your city from a village to a futuristic metropolis. Participate in events and claim rewards to boost your progress in this idle simulation game.

**Highlights:** Generate power with water wheels, dams, and stations, Explore diverse worlds, Hire prestige engineers for upgrades, Research new tech and automate production, Participate in regular events, Grow a hydro city

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

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Pass | $4.99 | per month |
| Boosters pack | $1.99 | one-time |
| Small Pack Of Coins | $1.99 | one-time |
| Special Bonuses | $1.99 | one-time |
| Boxes | $1.99 | one-time |
| No Ads | $2.99 | one-time |
| No Ads | $3.99 | one-time |
| Special Bonuses and No Ads | $3.99 | one-time |
| No Ads + Boosters pack | $4.99 | one-time |
| Medium Pack Of Coins | $5.99 | one-time |
| Boosters pack | $5.99 | one-time |
| Pack of Crystals | $5.99 | one-time |
| Special Bonuses and No Ads | $5.99 | one-time |
| No Ads + 5 x5 Time Boosters | $5.99 | one-time |
| Special Bonuses | $6.99 | one-time |
| Quadruple offline income | $7.99 | one-time |
| Special Bonuses and No Ads | $7.99 | one-time |
| Special Bonuses and No Ads | $8.99 | one-time |
| Large Pack Of Coins | $14.99 | one-time |
| Ultra Pack Of Coins | $24.99 | one-time |
| Mega Pack of Coins | $49.99 | one-time |

**What reviewers like**

- 🚀 Fun and addictive game
- 👍 Simple and easy to play
- 🚀 Good progression in early stages

**What reviewers complain about**

- 🐛 Impossible to progress past Canada
- 💰 Unrealistic pricing to unlock new areas
- 🔋 Slow offline earnings
- 📺 Too many ads
- 🐛 Bugs and glitches

**Reported bugs**

- Game progress resets after updates
- Ads that cannot be closed
- Inconsistent money generation

**Requested features**

- Reduce the cost to unlock Canada
- Improve offline earnings
- Reduce the number of ads


### Engine Pistons ASMR

[App page](https://appshunter.io/ios/app/engine-pistons-asmr/id1660464064)

Merge engine pistons to earn money and upgrade your car. Experience the satisfying ASMR of engine sounds while competing in races. Unlock diamond, gold, silver, and bronze pistons for maximum speed and profit.

**Highlights:** Merge engine pistons, Earn in-game money, Upgrade car and pistons, ASMR engine sounds, Race to win, Unlock piston tiers

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads 1 | $2.99 | one-time |
| No Ads 2 | $3.99 | one-time |
| No Ads 3 | $4.99 | one-time |

**What reviewers like**

- 👍 Good game concept
- 😍 Satisfying engine piston animation
- 🚀 Quick progression

**What reviewers complain about**

- 🔍 Too many ads and pop-ups
- 🔥 Overheating issues
- 🐛 Glitches and crashes
- 🔋 High battery consumption

**Reported bugs**

- Cars getting stuck or invisible
- Inability to progress past certain levels
- Inconsistent engine sound and animation

**Requested features**

- Remove ads or add paid ad-free option
- Improve performance and stability
- Add more gameplay depth and content


## Frequently asked questions

### Is Water Power! free?

Water Power! is free to download, with in-app purchases available.

### Is Engine Pistons ASMR free?

Engine Pistons ASMR is free to download, with in-app purchases available.

### Which has better reviews, Water Power! or Engine Pistons ASMR?

Water Power! is rated higher. Water Power! averages 4.6 out of 5 from 26K ratings, while Engine Pistons ASMR averages 4.6 from 1.9K ratings.

### Do Water Power! or Engine Pistons ASMR have ads?

Both Water Power! and Engine Pistons ASMR show ads.

### Which is updated more often, Water Power! or Engine Pistons ASMR?

Water Power! ships an update fortnightly, and Engine Pistons ASMR weekly. Most recently, Water Power! was updated on October 27, 2026 and Engine Pistons ASMR on October 27, 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.*