# BrainOpen vs 萤火虫

The clearest difference is update cadence: 萤火虫 at every 5 weeks against BrainOpen's every 18 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. BrainOpen sells 1 in-app purchase, starting at $3.99 per month and 萤火虫 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

BrainOpen ships an update every 18 months, 萤火虫 every 5 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BrainOpen | 萤火虫 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id6753701628/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 weeks** |
| Size | 113 MB | 8 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [鞯 赵](https://appshunter.io/developer/1567856103) | [媛媛 许](https://appshunter.io/developer/1809702896) |

## What reviewers say

### BrainOpen

[App page](https://appshunter.io/ios/app/brainopen/id1624322578)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Monthly Card-Unlimited Chat | $3.99 | per month |


### 萤火虫

[App page](https://appshunter.io/ios/app/id6753701628)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30天会员 | $3.99 | one-time |


## Frequently asked questions

### Is BrainOpen free?

BrainOpen is free to download, with in-app purchases available.

### Is 萤火虫 free?

萤火虫 is free to download, with in-app purchases available.

### Do BrainOpen or 萤火虫 have ads?

Neither BrainOpen nor 萤火虫 shows ads.

### Which is updated more often, BrainOpen or 萤火虫?

BrainOpen ships an update every 18 months, and 萤火虫 every 5 weeks. Most recently, BrainOpen was updated on October 25, 2026 and 萤火虫 on October 24, 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.*