# eeV（イーブイ） vs 咖博士

The clearest difference is iOS requirement: 咖博士 at 11.0 against eeV（イーブイ）'s 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

eeV（イーブイ） ships an update every 2 months, 咖博士 every 3 months. The most recent releases landed on September 6, 2026 and July 27, 2026 respectively.

## The numbers

| Metric | eeV（イーブイ） | 咖博士 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 44 MB | 49 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [REXEV Inc.](https://appshunter.io/developer/1509926736) | [Suzhou ChisalSoft Technology Co., Ltd.](https://appshunter.io/developer/786990357) |

## What reviewers say

### eeV（イーブイ）

[App page](https://appshunter.io/ios/app/eev/id1586258700)

**Features:** macOS Compatibility

**In-app purchases:** none


### 咖博士

[App page](https://appshunter.io/ios/app/id6444034192)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is eeV（イーブイ） free?

eeV（イーブイ） is free to download, with no in-app purchases.

### Is 咖博士 free?

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

### Do eeV（イーブイ） or 咖博士 have ads?

Neither eeV（イーブイ） nor 咖博士 shows ads.

### Which is updated more often, eeV（イーブイ） or 咖博士?

eeV（イーブイ） ships an update every 2 months, and 咖博士 every 3 months. Most recently, eeV（イーブイ） was updated on September 6, 2026 and 咖博士 on July 27, 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.*