# KEV vs Biifore

The clearest difference is update cadence: Biifore at every 3 weeks against KEV's every 6 months. KEV's advantage is iOS requirement (15.6 vs 18.6). 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.

KEV ships an update every 6 months, Biifore every 3 weeks. The most recent releases landed on September 13, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | KEV | Biifore |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/biifore/id6448490498/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 7 MB | 78 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Klinelex Co., Ltd.](https://appshunter.io/developer/1241172081) | [HEI Corp.](https://appshunter.io/developer/1684877971) |

## What reviewers say

### KEV

[App page](https://appshunter.io/ios/app/kev/id6444331318)

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

**In-app purchases:** none


### Biifore

[App page](https://appshunter.io/ios/app/biifore/id6448490498)

Monitor your electric vehicle's battery health proactively. Get a quick and accurate assessment of battery deterioration without needing to visit a service center. Regular use ensures more precise diagnostics for a greener and safer tomorrow.

**Highlights:** Proactive EV battery care, Fast, simple, accurate assessment, No service center visit required, Diagnoses within 1 minute after charging, Monitors current and future battery states, Uses patented HEI technology

**In-app purchases:** none


## Frequently asked questions

### Is KEV free?

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

### Is Biifore free?

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

### Do KEV or Biifore have ads?

Neither KEV nor Biifore shows ads.

### Which is updated more often, KEV or Biifore?

KEV ships an update every 6 months, and Biifore every 3 weeks. Most recently, KEV was updated on September 13, 2026 and Biifore on August 15, 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.*