# VibraPad vs 试题库

The clearest difference is price: 试题库 at Free against VibraPad's $119.99. VibraPad's advantage is iOS requirement (9.0 vs 17). On update cadence, ads, in-app purchases and device support there is nothing between them.

试题库 is free to download; VibraPad costs $119.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VibraPad ships an update every 4 months, 试题库 every 3 months. The most recent releases landed on June 5, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | VibraPad | 试题库 |
| --- | --- | --- |
| Price | $119.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/vibrapad/id452182524/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 12 MB | 18 MB |
| Requires iOS | **9.0** | 17 |
| Devices | iPad | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Motionics, LLC](https://appshunter.io/developer/424498959) | [中科软股教育科技(北京)股份有限公司](https://appshunter.io/developer/1395665821) |

## What reviewers say

### VibraPad

[App page](https://appshunter.io/ios/app/vibrapad/id452182524)

Learn the fundamentals of vibration analysis for machinery monitoring and diagnostics. Build virtual systems from a library of components, analyze sound signals via your device's microphone, and generate detailed reports. Optional external hardware enhances vibration data acquisition.

**Highlights:** Machine component library, Drag-and-drop system assembly, Sound signal acquisition via mic, External accelerometer data support, Live signal monitoring (time/frequency), Fundamental frequency calculator, Report generation and email

**Features:** macOS Compatibility

**In-app purchases:** none


### 试题库

[App page](https://appshunter.io/ios/app/id1478850740)

**In-app purchases:** none


## Frequently asked questions

### Is VibraPad free?

VibraPad costs $119.99, with no in-app purchases.

### Is 试题库 free?

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

### Do VibraPad or 试题库 have ads?

Neither VibraPad nor 试题库 shows ads.

### Which is updated more often, VibraPad or 试题库?

VibraPad ships an update every 4 months, and 试题库 every 3 months. Most recently, VibraPad was updated on June 5, 2026 and 试题库 on October 26, 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.*