Comparison

SoundEcho vs Letterfull

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

SoundEcho

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
Read full description

SoundEcho is a memory game with sounds that is easy to play and fully accessible with VoiceOver. SoundEcho is enjoyable for blind, low vision and sighted players alike. The gameplay is simple. Buttons showing a letter, number or smiley are spread across the screen. Tap a button to hear a sound. If two different buttons produce the same sound, they disappear. Find all matching sounds as quickly as possible with as few taps as you can. Choose from 4 sound categories: the classic animal and computer sounds, or the alternative traffic and musical instrument sounds. Each game contains 10, 15 or 20 sound pairs. SoundEcho integrates Game Center so you can compare scores, track achievements and play real-time matches with 2 to 4 players. SoundEcho was nominated for the 2023 Golden Apple Awards by the AppleVis website. Try SoundEcho for free today.

About

Letterfull

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
Currently charting
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Have you always wanted to play a game where you wish you could make up your own words but you can't? welcome to Letterfull! The game where you must manage to form words without filling the five by five game grid. The mechanic of the game is quite simple. The game board consists of five rows of five columns, which may contain letters that appear faster every level. With the letters that appear, you must form words by touching the letters with your finger. When you touch a letter, it will move to the bottom of the board, after the separator, i.e. the word you are trying to form. To submit the word and check if it is correct, (must have at least 3 letters and be in the dictionary of the chosen language -more on that later), you can tap the submit button (or double-tap with 2 fingers if you use VoiceOver). If you want to send all the letters back to the end of the game board, either because you made a mistake or because you saw another letter that can form a better word, you can tap the move all button or, if you use VoiceOver, do the back gesture (2 finger scrub). You can also tap one letter of the letters you have in your word to send it back to the end of the game board. The game is available in English, Spanish, Catalan and Italian, and changing the language does not involve any change in the game interface, only in the dictionary used to check if the words are correct. For people learning English, Catalan or another language available in the game, it can be very useful.

Screenshots

SoundEcho3 screens
Letterfull1 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard9 real differences · 2 level
SoundEcho versus Letterfull: the parameters behind the verdict, then further details
ParameterSoundEchoLetterfull
PriceFree — better$2.99
Rating4.3 (3 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 5 weeks — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
Best chart rank—#185 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size7 MB10 MB
Age rating12+4+
DeveloperKristof NijsOriol Gomez

Customer experience

SoundEcho

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Letterfull

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

1 purchases

SoundEcho

One-time1
  • Purchasing the app$4.49
None

Letterfull

No in-app purchases

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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