Comparison

VibraPad vs 试题库

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VibraPad

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
Read full description

VibraPad is an educational App to teach the basics of vibration analysis for rotating machinery monitoring, diagnostics and maintenance. It contains a library of machines including motor, pump, fan, blower, gearbox, belt derive, and bearings. The user can easily construct a system by connecting the components from the library, define the specification for each part of the system, and see the fundamental frequencies of the system in details and also on the vibration signal spectrum. The App can acquire the vibration signal through an extra hardware that can be purchased separately. However, without the extra hardware, the user can still acquire the sound signal of the machine through the mic of the iPad and the signal will be shown in the time- and frequency-domain. The harmonics of the machine frequencies can be also shown on the frequency signal. Features: - A library of machine components: motor, pump, fan, blower, gearbox, bearings, and belt drive -easy touch and drag-based assembly of the system using the library components - acquiring the sound signal of the machine through the iPad built-in Mic - Capability of the external accelerometer data acquiring if purchased with the extra hardware (contact Motionics for more info) - Live monitoring of the acquired (sound or vibration) signal in time and frequency - Zoom option for the signal in time and frequency domains - Fundamental frequency calculator for all machine components in the library - Report generation for all the machine components with fundamental frequencies - Report E-mail option - Automatic higher peak finder for the frequency signal ******** Note *********** The App requires external hardware to operate, please contact us for more information

About

试题库

Read full description

试题库APP是一款将海量优质学习资源与实用学习功能有机融合的学习软件。考试库涵盖英语类、计算机类、考研类、公务员类、财经类、司法类、医学类、工程类、专升本类、自考类、职业资格类、实用职业技能类等热门考试科目,提供名师精讲教学视频、历年真题/模拟题等优质学习资源。试题库还提供课程学练、模拟自测专项练习、学习进展、错题记录、错题组卷、智能考试等学习功能,为您日常学习与复习备考提供一站式服务。

Screenshots

试题库4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
VibraPad versus 试题库: the parameters behind the verdict, then further details
ParameterVibraPad试题库
Price$119.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPadiPhone
Requires iOS9.0 — better17
Further details — not scored
Size12 MB18 MB
Age rating4+17+
DeveloperMotionics, LLC中科软股教育科技(北京)股份有限公司

In-app purchases

None

VibraPad

No in-app purchases

None

试题库

No in-app purchases

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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