# BioFlash vs 少年卫星跟踪台

The clearest difference is ads: BioFlash at none against 少年卫星跟踪台's shown. 少年卫星跟踪台's advantage is update cadence (every 4 days vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. BioFlash sells 1 in-app purchase, starting at $2.99 per year and 少年卫星跟踪台 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

BioFlash ships an update every 7 months, 少年卫星跟踪台 every 4 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BioFlash | 少年卫星跟踪台 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 4 days** |
| Size | 44 MB | 10 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Gentiana Etemi](https://appshunter.io/developer/1883027493) | [峰 于](https://appshunter.io/developer/6772845425) |

## What reviewers say

### BioFlash

[App page](https://appshunter.io/ios/app/bioflash-glossary/id6760253478)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BioFlash Premium | $2.99 | per year |


### 少年卫星跟踪台

[App page](https://appshunter.io/ios/app/id6796221077)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free Base | Free | one-time |
| Pro Device Control | $9.90 | one-time |


## Frequently asked questions

### Is BioFlash free?

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

### Is 少年卫星跟踪台 free?

少年卫星跟踪台 is free to download, with in-app purchases available.

### Do BioFlash or 少年卫星跟踪台 have ads?

少年卫星跟踪台 shows ads; BioFlash does not.

### Which is updated more often, BioFlash or 少年卫星跟踪台?

BioFlash ships an update every 7 months, and 少年卫星跟踪台 every 4 days. Most recently, BioFlash was updated on November 5, 2026 and 少年卫星跟踪台 on October 31, 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.*