Comparison

Letterfull vs Echo Chain

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

Head to head
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
Read full description

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.

About

Echo Chain

This is an accessible audio game that challenges your memory by having you listen to and repeat sequences. It offers multiple game modes, including multiplayer and single-player challenges, and allows for custom sound packs. The experience is premium, ad-free, and designed for both visually impaired and sighted players.

Highlights
  • Listen and repeat audio sequences
  • Multiplayer and single-player modes
  • Custom sound pack creation
  • Global leaderboards
  • Fully accessible for visually impaired players
  • Ad-free premium experience
Features
Read full description

Echo Chain is an accessible, and ad-free audio game designed to challenge your mind, sharpen your memory, and deliver a seamless, high-quality experience built for both visually impaired and sighted players. At its core, Echo Chain is simple: listen to a sequence of sounds, then swipe to repeat it. Each round, the sequence grows. But mastering it? That's where the real challenge begins. FIVE UNIQUE WAYS TO PLAY Whether you want pressure, practice, pure competition, or a journey, Echo Chain adapts to your style: Online Multiplayer Mode (4-Player) Face off with friends or players across the world. Take turns building the chain, only the sharpest mind wins. Arcade Mode A classic single-player endurance run. How long can you keep the chain alive as sequences grow tougher and longer? Blitz Mode Speed meets memory. Survive the countdown as the tempo ramps up and reflexes become everything. Practice Mode A calm, risk-free space to learn new sound packs, refine your timing, and train your brain at your own pace. Voyage Mode Leave the ordinary behind and journey through three living sound worlds, Forest, Ocean, and Desert. Each environment wraps you in its own ambiance, assigns its own distinct audio cues, and gradually raises the stakes as you push deeper. Complete one world and the next begins, harder and richer. The chain never stops growing. Neither does the world around you. DAILY PULSE Every day, a brand new challenge is generated for all players worldwide, same sequence, same rules, one attempt. Finish fast, finish clean, and earn bonus points for every second you save. A dedicated daily leaderboard resets every 24 hours, so there is always something fresh to chase and a new rank to claim. CREATE YOUR OWN SOUND PACKS Your game. Your sound. Import audio files directly from your device to craft custom sound packs for every swipe direction. Play Echo Chain with your own style, your own rhythm, and your own personality. All custom creations come with their own score tracking via player achievements. COMPETE WITH THE BEST Climb dedicated global leaderboards across Multiplayer, Arcade, Daily Pulse, and Total Score. A PREMIUM EXPERIENCE - NO ADS, NO INTERRUPTIONS Echo Chain is fully unlocked with a single purchase. No ads. No paywalls. No distractions. Just pure gameplay. BUILT FOR ACCESSIBILITY Designed from day one with visually impaired players in mind, Echo Chain is fully navigable through audio, intuitively structured for screen-reader use, compatible end-to-end with VoiceOver, and playable without visuals from menus to gameplay. Every mode, every feature, every sound pack - fully accessible. Echo Chain is more than a memory game. It is a personal challenge, a creative tool and a competitive battleground, all powered by sound. How long can you keep the chain going?

Screenshots

Letterfull1 screens
Echo Chain4 screens

Verdict

The call

Letterfull and Echo Chain both sit at 5.0 stars, but that hides the real split: 100% of Echo Chain's written reviews are positive against 50% of Letterfull's. Echo Chain also leads on update cadence (every 3 weeks vs every 6 months). Letterfull's advantage is in-app purchases (none vs 7) and chart position (#188 vs unranked). On rating, ratings volume, ads and monetization model 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

Letterfull costs $2.99 and Echo Chain $3.99 up front. Echo Chain sells 7 one-off in-app purchases. Letterfull asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Letterfull against 5.0 for Echo Chain. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 50% of Letterfull's written reviews are positive against 100% of Echo Chain's.

UpkeepUpdate frequency

Letterfull ships an update every 6 months, Echo Chain every 3 weeks. The most recent releases landed on September 17, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 6 level
Letterfull versus Echo Chain: the parameters behind the verdict, then further details
ParameterLetterfullEcho Chain
Price$2.99 — better$3.99
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 6 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
Best chart rank#188 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size10 MB196 MB
Age rating4+12+
DeveloperOriol GomezUnmbox Studios

Customer experience

Letterfull

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

Echo Chain

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Letterfull

No in-app purchases

7 purchases

Echo Chain

One-time7
  • Pixel Beats$0.99
  • Sonic Pulse$0.99
  • Cosmic Burst$0.99
Show 4 more
  • Cyber Flow$0.99
  • Power Strike$0.99
  • Photon Slash$1.99
  • Tranquil Wave$1.99

Questions

Is Letterfull free?
Letterfull costs $2.99, with no in-app purchases.
Is Echo Chain free?
Echo Chain costs $3.99, and also offers in-app purchases.
Which has better reviews, Letterfull or Echo Chain?
Letterfull and Echo Chain are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Letterfull or Echo Chain have ads?
Neither Letterfull nor Echo Chain shows ads.
Which is updated more often, Letterfull or Echo Chain?
Letterfull ships an update every 6 months, and Echo Chain every 3 weeks. Most recently, Letterfull was updated on September 17, 2026 and Echo Chain on September 27, 2026.

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