# Batteryphix vs BK400

The clearest difference is update cadence: BK400 at weekly against Batteryphix's every 3 months. Batteryphix's advantage is iOS requirement (12.0 vs 15.0). 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.

Batteryphix ships an update every 3 months, BK400 weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Batteryphix | BK400 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 106 MB | 21 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Autophix Tech Co., Ltd](https://appshunter.io/developer/650288249) | [祖策 谢](https://appshunter.io/developer/983519195) |

## What reviewers say

### Batteryphix

[App page](https://appshunter.io/ios/app/batteryphix/id6738903118)

**Features:** macOS Compatibility

**In-app purchases:** none


### BK400

[App page](https://appshunter.io/ios/app/bk400/id6760681499)

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

**In-app purchases:** none


## Frequently asked questions

### Is Batteryphix free?

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

### Is BK400 free?

BK400 is free to download, with no in-app purchases.

### Do Batteryphix or BK400 have ads?

Neither Batteryphix nor BK400 shows ads.

### Which is updated more often, Batteryphix or BK400?

Batteryphix ships an update every 3 months, and BK400 weekly. Most recently, Batteryphix was updated on October 28, 2026 and BK400 on October 25, 2026.

---

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