Comparison

CATService vs Spindle Dynamics Studio

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

Head to head
About

CATService

Features
Read full description

This app requires external measurement hardware to operate. This app is a custom-made app for Caterpillar to conduct engine vibration test and crankshaft deflection test. The vibration test function connects iPad to the Data Acquisition Box and collects in real time the Overall RMS Vibration (Acceleration, Velocity and Displacement). Real time vibration spectrum is also displayed. The crankshaft deflection test function works with Motionics wireless measurement read (WiMER). When the sensor is attached and connected, users can wirelessly capture sensor readings at 5 testing positions on crankshaft via Bluetooth Low Energy. Crank web vertical and horizontal deflections are automatically calculated once 5 readings are collected. Testing report is generated after each test. It also enables importing and merging PDF reports created by other Apps. User can easily get access to saved reports via a report manager. FEATURES: Vibration Test: - Real-Time Overall RMS values - Vibration Signal Spectrum/Waveform - Vibration in Velocity (ips or mm/s) or Acceleration (G's) - User can select from different industrial severity standards - User can define customized alarm and danger values - Signal Averaging option Crankshaft Deflection Test: - Wireless sensor connectivity - Test information editing - Sensor measuring crankshaft rotating angle and indicator showing test positions - Crankshaft end play test included - Auto calculating vertical and horizontal deflections Report Generation: - Test report generation including engine information, measurement values, data plots, note, signature, location information - Email PDF report and wireless printing - Report manager available - Import and merge reports from other Apps

About

Spindle Dynamics Studio

Features
Read full description

The app is designed to perform Acceptance Testing for Industrial Spindles. Key Features: - Vibration Meter - Vibration Analysis Tools (Time-Waveform & Spectrum) - Spindle Vibration Acceptance Test - Spindle Thermal Testing - Spindle Single-Plane and Dual-Plane Balancing - Multisensor vibration test - Connects to commercial available wireless bluetooth sensors (no need to connect any cable to the iPad) - Data and Reports can be stored on the device or in the cloud for further analysis

Verdict

The call

The clearest difference is price: Spindle Dynamics Studio at Free against CATService's $450.00. Spindle Dynamics Studio also leads on update cadence (every 2 months vs every 15 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Spindle Dynamics Studio is free to download; CATService costs $450.00 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CATService ships an update every 15 months, Spindle Dynamics Studio every 2 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

Scorecard2 real differences ยท 4 level
CATService versus Spindle Dynamics Studio: the parameters behind the verdict, then further details
ParameterCATServiceSpindle Dynamics Studio
Price$450.00Free โ€” better
Update frequencyEvery 15 monthsEvery 2 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPadiPad
Requires iOS13.013.0
Further details โ€” not scored
Size13 MB107 MB
Age rating4+4+
DeveloperMotionics LLCSens-OS

In-app purchases

None

CATService

No in-app purchases

None

Spindle Dynamics Studio

No in-app purchases

Questions

Is CATService free?
CATService costs $450.00, with no in-app purchases.
Is Spindle Dynamics Studio free?
Spindle Dynamics Studio is free to download, with no in-app purchases.
Do CATService or Spindle Dynamics Studio have ads?
Neither CATService nor Spindle Dynamics Studio shows ads.
Which is updated more often, CATService or Spindle Dynamics Studio?
CATService ships an update every 15 months, and Spindle Dynamics Studio every 2 months. Most recently, CATService was updated on October 6, 2026 and Spindle Dynamics Studio on October 4, 2026.

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