CATService vs Spindle Dynamics Studio
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
CATService
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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
Spindle Dynamics Studio
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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 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
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.
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.
| Parameter | CATService | Spindle Dynamics Studio |
|---|---|---|
| Price | $450.00 | Free โ better |
| Update frequency | Every 15 months | Every 2 months โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPad |
| Requires iOS | 13.0 | 13.0 |
| Further details โ not scored | ||
| Size | 13 MB | 107 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | Sens-OS |
In-app purchases
CATService
No in-app purchases
Spindle Dynamics Studio
No in-app purchases
Questions
Is CATService free?
Is Spindle Dynamics Studio free?
Do CATService or Spindle Dynamics Studio have ads?
Which is updated more often, CATService or Spindle Dynamics Studio?
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