# One Block vs Perfect Echo

The clearest difference is in-app purchases: Perfect Echo at none against One Block's 10. Perfect Echo also leads on iOS requirement (12.0 vs 16.0). One Block's advantage is update cadence (every 9 days vs every 35 months). On price, ads and device support there is nothing between them.

Both are free to download. One Block sells 10 one-off in-app purchases. Perfect Echo asks for nothing beyond the download.

One Block ships an update every 9 days, Perfect Echo every 35 months. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | One Block | Perfect Echo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 35 months |
| Monetization | Free with in-app purchases | — |
| Size | 131 MB | 41 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Martynas Gavelis](https://appshunter.io/developer/1532618503) | [Marco Andreotti](https://appshunter.io/developer/1514019597) |

## What reviewers say

### One Block

[App page](https://appshunter.io/ios/app/one-block-puzzle-adventure/id1532618501)

Test your problem-solving skills by sliding and merging blocks until only one remains. This logic puzzle offers a relaxing, stress-free experience with no time limits, featuring handcrafted levels and an accessible design for all players.

**Highlights:** Strategic block merging, No time limits, Handcrafted levels, Colorblind accessible design, Relaxing ambient audio, Achievement tracking

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Levels Package 4 | $1.99 | one-time |
| Handful of Coins | $1.99 | one-time |
| Unlimited Lives | $1.99 | one-time |
| Remove Ads Bundle | $2.99 | one-time |
| Remove Ads | $3.99 | one-time |
| Pile of Coins | $3.99 | one-time |
| Remove Ads | $5.99 | one-time |
| Remove Ads | $7.99 | one-time |
| Bucket of Coins | $7.99 | one-time |


### Perfect Echo

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is One Block free?

One Block 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 One Block or Perfect Echo have ads?

Both One Block and Perfect Echo show ads.

### Which is updated more often, One Block or Perfect Echo?

One Block ships an update every 9 days, and Perfect Echo every 35 months. Most recently, One Block was updated on October 7, 2026 and Perfect Echo on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*