# 40hz灯 vs 前端面试题库

The clearest difference is in-app purchases: 40hz灯 at none against 前端面试题库's 6. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 前端面试题库 sells 6 one-off in-app purchases. 40hz灯 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 11 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 40hz灯 | 前端面试题库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | Every 11 months |
| Size | 34 MB | 42 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zhongke Ningxin Co., Ltd.](https://appshunter.io/developer/1475589505) | [祥利 管](https://appshunter.io/developer/1553028619) |

## What reviewers say

### 40hz灯

[App page](https://appshunter.io/ios/app/40hz/id1594573895)

**Features:** macOS Compatibility

**In-app purchases:** none


### 前端面试题库

[App page](https://appshunter.io/ios/app/id6467690667)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7天体验卡 | $0.99 | one-time |
| 月卡 | $1.99 | one-time |
| 季卡 | $3.99 | one-time |
| 年卡 | $5.99 | one-time |
| 年卡 | $9.99 | one-time |
| 终生卡 | $14.99 | one-time |


## Frequently asked questions

### Is 40hz灯 free?

40hz灯 is free to download, with no in-app purchases.

### Is 前端面试题库 free?

前端面试题库 is free to download, with in-app purchases available.

### Do 40hz灯 or 前端面试题库 have ads?

Neither 40hz灯 nor 前端面试题库 shows ads.

### Which is updated more often, 40hz灯 or 前端面试题库?

40hz灯 ships an update every 11 months, and 前端面试题库 every 11 months. Most recently, 40hz灯 was updated on October 13, 2026 and 前端面试题库 on October 7, 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.*