# ECHO-GRIDs - Number Puzzle — Place digits, ripple the board

> Place digits, ripple the board (iPhone/iPad app by wapon Inc..)

- Source: https://appshunter.io/ios/app/echo-grids-number-puzzle/id6791798318 (this page in markdown: same URL + `.md`)
- Developer: [wapon Inc.](https://appshunter.io/developer/563984006)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 101 MB
- Languages: American English
- Released: 2026-07-23
- Data updated: 2026-08-15
- User reviews in markdown: https://appshunter.io/ios/app/echo-grids-number-puzzle/id6791798318/reviews.md

## What is ECHO?

Every digit you place echoes across the board.

ECHO GRID is a fresh kind of logic puzzle about reading the ripples.
Place digits 1-3 on a 5x5 board. Each digit sends an echo up, down, left and right, traveling as far as its own value and adding that value to every cell it passes through.
Match the target sum of every row and column to clear the stage!

SIMPLE TO LEARN, DEEP TO MASTER
- One rule: place digits. You'll get it in a minute
- A single digit affects several rows and columns at once - plan ahead
- Every puzzle has exactly one solution. Pure logic, no guessing

SPECIAL CELLS CHANGE EVERYTHING
- Walls block echoes
- Mirrors bend them 90 degrees
- Amplifiers add +1 to passing echoes
The same 5x5 board feels completely different with each combination.

PLENTY TO PLAY
- 100 stages, stepping up from basics to walls, mirrors, amplifiers and beyond
- No locks - jump straight to any stage you like
- A Daily Challenge shared by players worldwide, with streaks and lifetime stats

THINK AT YOUR OWN PACE
- Long-press any cell to see exactly which echoes reach it and from where
- Stuck? A hint corrects just one cell
- Calm neon visuals and soft, soothing sound

PERFECT FOR
- Fans of sudoku-style and logic puzzles
- Short brain workouts on your commute
- Quiet, focused play before bed - works offline

Available in English and Japanese.

Listen to the echoes. One digit changes the whole board.


## Version history (last 1 release)

### 1.0.0 — 2026-07-23

No release notes.

## More apps by wapon Inc.

- [FLIPS - Number Logic Puzzle](https://appshunter.io/ios/app/flips-number-logic-puzzle/id6787373890)
- [BoardGame ToolBox](https://appshunter.io/ios/app/boardgame-toolbox/id6788137483)

All apps by wapon Inc.: https://appshunter.io/developer/563984006

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*