# SARKWO vs Perfect Echo

The clearest difference is in-app purchases: Perfect Echo at none against SARKWO's 4. SARKWO's advantage is update cadence (every 6 weeks vs every 35 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SARKWO sells 4 one-off in-app purchases. Perfect Echo asks for nothing beyond the download.

SARKWO ships an update every 6 weeks, Perfect Echo every 35 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SARKWO | Perfect Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (305 ratings)](https://appshunter.io/ios/app/sarkwo/id1462867280/reviews)** | — |
| Number of ratings | **305** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 weeks** | Every 35 months |
| Monetization | Free with in-app purchases | — |
| Size | 88 MB | 41 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kishor Berde](https://appshunter.io/developer/1146168572) | [Marco Andreotti](https://appshunter.io/developer/1514019597) |

## What reviewers say

### SARKWO

[App page](https://appshunter.io/ios/app/sarkwo/id1462867280)

Engage in an addictive puzzle game where you slide marbles to reach their goals. Master the unique mechanic of all marbles sliding together across 80 handcrafted levels. Enjoy a strategic challenge with creative puzzle designs and no time pressure.

**Highlights:** 80 handcrafted puzzles, All marbles slide together mechanic, Creative puzzle mechanics, Unique theme per puzzle, No timers or move counters, Original music and sound effects

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game: Pay Choice 1 | $0.99 | one-time |
| Unlock Full Game: Pay Choice 2 | $1.99 | one-time |
| Unlock Full Game: Pay Choice 3 | $2.99 | one-time |
| Unlock Full Game: Pay Choice 4 | $4.99 | one-time |

**What reviewers like**

- 👍 Addictive gameplay
- 🧠 Mind-twisting puzzles
- 😌 Relaxing and stress-free
- 💡 Original idea
- 👍 Simple but enjoyable

**What reviewers complain about**

- 😔 No congratulations at the end
- 🤔 Some levels require brute force
- 🤔 Music/sound toggle finicky
- 🤔 Buttons can be finicky
- 🤔 Lack of explanation for some elements

**Reported bugs**

- 🐛 Last level bugged (red dot disappears)
- 🐛 Some levels don't have enough colored points
- 🐛 Music/sounds won't stay toggled off

**Requested features**

- Skip level or walkthrough
- Overview of levels
- Level count display
- More levels


### Perfect Echo

[App page](https://appshunter.io/ios/app/perfect-echo/id1544980146)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SARKWO free?

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

### Is Perfect Echo free?

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

### Do SARKWO or Perfect Echo have ads?

Both SARKWO and Perfect Echo show ads.

### Which is updated more often, SARKWO or Perfect Echo?

SARKWO ships an update every 6 weeks, and Perfect Echo every 35 months. Most recently, SARKWO was updated on October 24, 2026 and Perfect Echo on October 14, 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.*