# 琴豆调音 vs FLOW 4V

The clearest difference is ads: FLOW 4V at none against 琴豆调音's shown. FLOW 4V also leads on update cadence (every 2 months vs every 9 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

琴豆调音 ships an update every 9 months, FLOW 4V every 2 months. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 琴豆调音 | FLOW 4V |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 9 MB | 23 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [昭 张](https://appshunter.io/developer/1269107959) | [Empower Tribe Innovations DE GmbH](https://appshunter.io/developer/1447618711) |

## What reviewers say

### 琴豆调音

[App page](https://appshunter.io/ios/app/id6739384965)

**Features:** macOS Compatibility

**In-app purchases:** none


### FLOW 4V

[App page](https://appshunter.io/ios/app/flow-4v/id6761411546)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 琴豆调音 free?

琴豆调音 is free to download, with no in-app purchases.

### Is FLOW 4V free?

FLOW 4V is free to download, with no in-app purchases.

### Do 琴豆调音 or FLOW 4V have ads?

琴豆调音 shows ads; FLOW 4V does not.

### Which is updated more often, 琴豆调音 or FLOW 4V?

琴豆调音 ships an update every 9 months, and FLOW 4V every 2 months. Most recently, 琴豆调音 was updated on October 8, 2026 and FLOW 4V on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*