# SoundEcho vs Letterfull

The clearest difference is review sentiment: SoundEcho at 100% against Letterfull's 50%. SoundEcho also leads on price (Free vs $2.99) and update cadence (every 5 weeks vs every 6 months). Letterfull's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 1). On ads and device support there is nothing between them.

SoundEcho is free to download; Letterfull costs $2.99 up front. SoundEcho sells 1 one-off in-app purchase. Letterfull asks for nothing beyond the download.

Letterfull holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews complicate that: 100% of SoundEcho's written reviews are positive against 50% of Letterfull's, so the app with the better star average is not the one people write more warmly about.

SoundEcho ships an update every 5 weeks, Letterfull every 6 months. The most recent releases landed on September 25, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SoundEcho | Letterfull |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/soundecho/id1639116371/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/letterfull/id1639843494/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#181** |
| Size | 7 MB | 10 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Kristof Nijs](https://appshunter.io/developer/1608072573) | [Oriol Gomez](https://appshunter.io/developer/1528856183) |

## What reviewers say

### SoundEcho

[App page](https://appshunter.io/ios/app/soundecho/id1639116371)

A fun and accessible memory game using sound cues. Players match pairs of buttons that produce the same sound to clear the board. Supports multiple sound themes and player counts, with Game Center integration.

**Highlights:** Sound-based memory matching, VoiceOver accessibility, Animal and computer sound themes, Multiple difficulty levels (10, 15, 20 sounds), 2-4 player real-time multiplayer, Game Center integration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchasing the app | $4.49 | one-time |


### Letterfull

[App page](https://appshunter.io/ios/app/letterfull/id1639843494)

**Currently charting:** #181 Top Paid · Word (US App Store)

A word puzzle game where you form words by touching letters on a grid. Avoid filling the board as letters appear faster with each level. Supports multiple languages and offers accessibility options.

**Highlights:** Form words by touching letters, Avoid filling the game grid, Letters appear faster each level, Supports English, Spanish, Catalan, Italian, Accessibility options for VoiceOver, Minimum 3-letter words required

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SoundEcho free?

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

### Is Letterfull free?

Letterfull costs $2.99, with no in-app purchases.

### Which has better reviews, SoundEcho or Letterfull?

Letterfull is rated higher. SoundEcho averages 4.3 out of 5 from 3 ratings, while Letterfull averages 5.0 from 1 ratings.

### Do SoundEcho or Letterfull have ads?

Neither SoundEcho nor Letterfull shows ads.

### Which is updated more often, SoundEcho or Letterfull?

SoundEcho ships an update every 5 weeks, and Letterfull every 6 months. Most recently, SoundEcho was updated on September 25, 2026 and Letterfull on October 5, 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.*