# echoPi: Haptic Fidget Slider — Clicker Toy, Music & Rhythm

> Clicker Toy, Music & Rhythm (iPhone/iPad app by 扬 张.)

- Source: https://appshunter.io/ios/app/echopi-haptic-fidget-slider/id6819508493 (this page in markdown: same URL + `.md`)
- Developer: [扬 张](https://appshunter.io/developer/1882992263)
- Category: Entertainment, Music
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 89 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-10-06
- Data updated: 2026-10-29

## What is echoPi?

echoPi is a programmable EDC fidget slider and pocket instrument: real clicks you can tune, and a sound for every click. This free app lets you try it on your iPhone today: slide it on screen, tune the feel and the sound, and play a tune. The echoPi hardware is in development; the app works on its own.

TRY THE FEEL
Drag the slider on screen. Every click, buzz and sound plays the way you set it. Your phone can only approximate it. The real feel is on echoPi.

TUNE THE FEEL
Seven stops. Make each one a click or a smooth glide, and give it its own vibration: set how strong and how long. Start from a preset and change what you like.

TUNE THE SOUND
Pick a sound for every click, play a melody one push at a time, or turn the seven stops into seven keys.

PLAY ALONG
Push along with the notes and go for Perfect.

YOURS, ON YOUR PHONE
Works offline. No account, no sign-up. Your creations stay on your phone.

HARDWARE PROGRESS
echoPi is in development. The home screen shows where the hardware is, stage by stage. Specs are design targets and may change before launch.

## Is echoPi safe?

Not enough ratings yet to assess echoPi.

## Is echoPi legit?

echoPi: Haptic Fidget Slider has limited verification signals. The AppsHunter Legitimacy Score for echoPi is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.4.0 — 2026-10-27

- Every push feels better: the click sounds faster, and the haptics build up as you push faster.
- Each push brings color back to a world behind the slider. Light one up fully and the next world begins.
- Play along now has Relax mode (no game over) and Challenge mode.

### 1.3.0 — 2026-10-25

- Looks right on iPhone Duo unfolded and on larger screens.
- Custom mode: set the sound and buzz of every stop. Pushing on and pushing back can differ.
- Save the feel you tuned, give it a name, and change its colors.
- Play along: a quick how-to before your first song, a beginner shield until your first clear, Today's song, and a day streak.
- Sweep notes: swipe all the way to the end for the big click.
- After a clear, go straight to the next song.
- Privacy: you can now use echoPi without sending anonymous usage counts, and change it anytime in Me.
- The default click plays fuller at the default volume.
- Get launch news by email, right in the app.

### 1.1.0 — 2026-10-12

• Play along, rebuilt: 28 songs, including full piano pieces, on seven lanes. Each song plays in its own world.
• Try the feel on a full screen, from Home or Devices.
• The multiverse from echopi.ai is now on Home.
• English by default. Switch to Chinese in Me.
• The app now sends anonymous usage counts. Nothing in them identifies you.

### 1.0.0 — 2026-10-06

No release notes.

## More apps by 扬 张

- [EchoType回声派](https://appshunter.io/ios/app/echotype/id6779454488)

All apps by 扬 张: https://appshunter.io/developer/1882992263

## Related topics

[haptic fidget](https://appshunter.io/ios/topics/haptic-fidget)

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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 2026-10-29.*