# BioChem Sprint 9 vs ChainPad Junior

The clearest difference is update cadence: BioChem Sprint 9 at every 2 days against ChainPad Junior's weekly. On price, ads, in-app purchases and device support there is nothing between them.

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

BioChem Sprint 9 ships an update every 2 days, ChainPad Junior weekly. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BioChem Sprint 9 | ChainPad Junior |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Size | 20 MB | 29 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nguyen Khanh Vy](https://appshunter.io/developer/1868173737) | [Hai Pham Ngoc](https://appshunter.io/developer/1874836430) |

## What reviewers say

### BioChem Sprint 9

[App page](https://appshunter.io/ios/app/biochem-sprint-9/id6757666372)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChainPad Junior

[App page](https://appshunter.io/ios/app/chainpad-junior/id6758757445)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BioChem Sprint 9 free?

BioChem Sprint 9 is free to download, with no in-app purchases.

### Is ChainPad Junior free?

ChainPad Junior is free to download, with no in-app purchases.

### Do BioChem Sprint 9 or ChainPad Junior have ads?

Neither BioChem Sprint 9 nor ChainPad Junior shows ads.

### Which is updated more often, BioChem Sprint 9 or ChainPad Junior?

BioChem Sprint 9 ships an update every 2 days, and ChainPad Junior weekly. Most recently, BioChem Sprint 9 was updated on October 31, 2026 and ChainPad Junior on October 28, 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.*