# 233621 — Spark Passion

> Companion app for 233621 acoustic earphones to manage settings and firmware. (iPhone/iPad app by Shenzhen Grandsun Electronic Co.,Ltd.)

- Source: https://appshunter.io/ios/app/233621/id1548404060 (this page in markdown: same URL + `.md`)
- Developer: [Shenzhen Grandsun Electronic Co.,Ltd](https://appshunter.io/developer/1043379862)
- Category: Lifestyle, Music
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.1 · 140 MB
- Languages: English, Chinese
- Released: 2021-01-22
- Data updated: 2026-06-12
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/233621/id1548404060/reviews.md

## What is 233621?

233621 app is an intelligent extension of 233621 acoustic earphone. Connect your smartphone through Bluetooth, you can quickly set the function of the headset, and support OTA firmware upgrade to improve the headset, continuously improve your listening experience, and release the full potential of your 233621 Bluetooth product. In the future, we will continue to update the app to provide you with more functions and services

## Key features

- Bluetooth connectivity
- Headset function settings
- OTA firmware upgrades
- Enhanced listening experience
- Unlock product potential


## Frequently asked questions about 233621

### What is 233621 used for?

233621 is an intelligent extension for 233621 acoustic earphones. It allows you to connect your smartphone via Bluetooth to quickly set headset functions and perform OTA firmware upgrades.

### Does 233621 require a purchase?

No, 233621 is available for free. It does not have any in-app purchases or advertisements, making it a completely free experience.

### What devices are compatible with 233621?

The 233621 app is designed for iPhone and iPod devices. It requires a Bluetooth connection to function with compatible 233621 acoustic earphones.

### How often is 233621 updated?

The app was last updated on June 10, 2025, with version 2.7.1. The developer plans to continue updating the app to provide more functions and services in the future.

### What is the age rating for 233621?

233621 has an age rating of 4+. This indicates it is suitable for children and general audiences.

### Can 233621 improve my listening experience?

Yes, 233621 supports OTA firmware upgrades that can improve your headset's performance and continuously enhance your listening experience.

### Does 233621 have ads?

No, 233621 does not contain advertisements. The app is free to use without any ad interruptions.

## Version history (last 5 releases)

### 2.7.1 — 2025-06-10

Bug fixes.
Font update.

### 2.7.0 — 2023-02-28

Update UI

### 2.6.0 — 2022-10-11

Fix the bug of sense

### 2.5.9 — 2022-05-25

The new version of hush supports touch customization.

### 2.5.8 — 2022-04-08

HUSH multi touch custom optimization；

## Apps similar to 233621

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [WooberlyHandyman](https://appshunter.io/ios/app/wooberlyhandyman/id1614239340) | — | Free | Lifestyle |
| [EV Everywhere](https://appshunter.io/ios/app/ev-everywhere/id6469681849) | — | Free | Lifestyle |
| [Reality Sandwich App](https://appshunter.io/ios/app/reality-sandwich-app/id6680180365) | — | Free | Lifestyle |
| [Lemory: Gratitude Journal](https://appshunter.io/ios/app/lemory-gratitude-journal/id6746450747) | 5.0 (4) | $0.49 | Lifestyle |
| [Light Lite](https://appshunter.io/ios/app/light-lite/id6444394011) | — | Free | Lifestyle |
| [GAMBO: 17s/68s Manifesting](https://appshunter.io/ios/app/gambo-17s68s-manifesting/id6468561440) | — | Free | Lifestyle |

## More apps by Shenzhen Grandsun Electronic Co.,Ltd

- [ANC Earphone](https://appshunter.io/ios/app/anc-earphone/id1181715781)
- [耳卫士 - 关爱听力健康](https://appshunter.io/ios/app/id1567888318)
- [煲机助手 - 煲出好音质](https://appshunter.io/ios/app/id6449456720)

All apps by Shenzhen Grandsun Electronic Co.,Ltd: https://appshunter.io/developer/1043379862

## Related topics

[233621](https://appshunter.io/ios/topics/233621)

---

*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 2026-06-12.*