Protractor vs Trailer Check Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor
Measure angles precisely using your phone's screen, gyroscope, or camera. Offers smart presets, real-time feedback with high accuracy, and calibration features to adapt to various situations.
- 3-in-1 measurement modes
- Smart angle presets with alerts
- Hyper-responsive feedback (≤0.5° accuracy)
- Auto dynamic compensation calibration
- Anti-shake technology for motion scenes
- Screen lock for measurements
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Ditch bulky tools! Measure angles precisely anywhere with just your phone. *** Features *** ► Full-Scene Precision Measurement * 3-in-1 Modes: Screen Protractor / Gyroscope Protractor/ Camera Protractor, adapt to different scenarios. * Smart Angle Preset: Input target angles for instant deviation alerts. * Hyper-Responsive Feedback: Real-time tracking with ≤0.5° accuracy. ► Triple-Calibration Assurance * Auto Dynamic Compensation: Device-position-aware baseline calibration * Anti-Shake Tech: 80% accuracy boost in motion scenes (Gyroscope Mode) * Screen lock: Freeze measurements instantly to prevent accidental touches. ► Contact Us * Email: ceo@noadit.com
Trailer Check Pro
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TrailerCheck Pro is a high-fidelity diagnostic application designed to interface seamlessly with TrailerCheck Pro hardware via Bluetooth Low Energy (BLE). Built for mechanics, fleet operators, and DIY enthusiasts, it provides professional-grade diagnostics, monitoring, and control for trailer lighting and power systems. Key Features: Real-Time Telemetry: Monitor output voltage, load current, device temperature, and battery health with high precision. Lighting Controls: Interactive, wireless control over Brake, Tail, Clearance, Turn Signals, Hazards, and Auxiliary power. Intelligent Visualization: Real-time trailer model visualization showing active light states and animations as you test. Battery Diagnostics: Advanced monitoring with support for various battery types (Milwaukee M18, DeWalt 20V, Bosch 18V). Over-the-Air Updates: Perform wireless firmware updates on your TrailerCheck Pro hardware directly from the app. NFC Quick-Launch: Instantly launch the app and connect by tapping your phone to the hardware case. Note: This app requires the physical TrailerCheck Pro hardware to function.
Screenshots
Verdict
The clearest difference is in-app purchases: Trailer Check Pro at none against Protractor's 6. Trailer Check Pro also leads on iOS requirement (15.1 vs 17.0). On price, ads 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
Both are free to download. Protractor sells 6 in-app purchases, starting at $4.99 per month. Trailer Check Pro asks for nothing beyond the download.
| Parameter | Protractor | Trailer Check Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (6 ratings) — better | — |
| Positive reviews | 63.6% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 5 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 7 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Noadit, Inc. | Greg Maendel |
In-app purchases
Protractor
- VIP3 Days trial$4.991 Month
- Bubble Tea$0.99
- Sponsor$4.99
- Coffee$4.99
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- Sponsor$19.99
- Sponsor$99.99
Trailer Check Pro
No in-app purchases
Questions
Is Protractor free?
Is Trailer Check Pro free?
Do Protractor or Trailer Check Pro have ads?
Other comparisons
