Sensor vs Boat Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sensor
Access and utilize all your device's sensors with this comprehensive tool. Explore GPS, gyroscope, acceleration, magnetometer, altimeter, and attitude data for various applications and research.
- Access GPS for precise location
- Utilize gyroscope for orientation
- Measure acceleration and movement
- Detect magnetic fields with magnetometer
- Access altimeter and pressure data
- Monitor device attitude (roll, pitch, yaw)
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Unlock the full potential of your iPhone and iPad with Sensor-App, the ultimate tool for accessing and utilizing all of your device's sensors. Whether you're an enthusiast, a developer, or simply curious about your device's capabilities, Sensor-App offers a comprehensive suite of tools at your fingertips. Explore a plethora of sensors including: - **GPS**: Navigate with precision and track your device’s exact location. - **Gyroscope**: Experience precise orientation and rotation insights for enhanced application performance. - **Acceleration Sensor**: Measure the speed and direction of movement, perfect for fitness and motion-based applications. - **Magnetometer**: Detect magnetic field strength and direction, useful for navigation and augmented reality. - **Altimeter/Pressure Sensor**: Access real-time altitude and pressure data, ideal for outdoor adventures. - **Attitude**: Understand device posture with detailed readings of roll, pitch, and yaw. Designed with both power users and beginners in mind, Sensor-App provides intuitive access to your device’s advanced hardware features. Take control of your sensor data and transform how you interact with the world around you. Whether for personal exploration, scientific research, or application development, Sensor-App is your gateway to a more insightful mobile experience.
Boat Calculator
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Boat & Marine Engine Toolkit is a professional calculator suite for boat owners, marine engineers, naval architects, ship captains, and offshore platform crews. Run every calculation fully offline — at the dock, at anchor, or miles from the nearest cell tower. No ads, no accounts, no subscription. From sizing ground tackle for a blow to checking prop shaft torque before sea trials, the toolkit puts trusted marine engineering formulas in your pocket and keeps them there. WHAT'S INCLUDED: Fuel Burn & Range, Bollard Spacing, and the CG-719S reference are free. The other six calculators and five reference tables open with the one-time unlock below. Navigation & Anchoring - Hull Speed Calculator — compute theoretical hull speed and speed/length (S/L) ratio from waterline length for sailboats, trawlers, and displacement craft. - Anchor Rode Scope — plan rode length from water depth, bow height, and tide for safe overnight holding. - Concrete Anchor — allowable tension and shear for dock and pier fittings bolted into concrete, from anchor type, bolt diameter, embed depth, concrete f'c, and edge distance (ACI 318-19 Ch. 17). Propulsion & Drivetrain - Prop Shaft Torque — calculate shaft torque from engine horsepower and shaft RPM for gearbox and coupling sizing. - Hydraulic Cylinder Force — push and pull force from bore, rod diameter, and system pressure for steering, hatch, and deck gear. - Fuel Burn & Range — project burn rate in GPH, cruising range in nautical miles, and fuel cost per hour from engine power, engine load, tank capacity, and cruise speed in knots. Safety & Compliance - Bilge Pump Sizer — size pump capacity against hull volume with ABYC-aware guidance for peace of mind. - Bollard Spacing — lay out vehicle-barrier bollards to ASTM F2656 K4/K8/K12: bollard count, maximum on-center spacing, and impact energy and force from vehicle weight, speed, and protected width. Reference Tables - Beaufort wind scale, anchor type comparison, ABYC bilge pump standards, shaft material properties, hydraulic cylinder sizes, and CG-719S return reasons — the numbers you actually reach for on deck. WHO IS IT FOR: - Boat owners planning passages, provisioning, and ground tackle - Marine engineers sizing drivetrains, hydraulics, and auxiliaries - Naval architects sanity-checking hull displacement and S/L figures - Ship captains and mates running quick bridge calculations - Offshore platform crews and workboat operators on deck - Marine surveyors documenting condition and compliance notes WHY MARINE PROS LOVE IT: - 100% offline — every calculator runs on-device, so you never lose a tool when you lose signal offshore. - No ads and no tracking — clean, focused screens built for use at sea. - No subscription — pay once, own it, use it on every trip. - Instant results — type values, get answers, move on to the next job on the checklist. - Professional formulas — ABYC-aware guidance, standard naval architecture equations, and clear unit handling (knots, feet, inches, psi, bar, gallons, HP). ONE-TIME UNLOCK: Unlock All Calculators is a single $12.99 USD in-app purchase. It is a one-time, non-consumable unlock — not a subscription. One payment opens every Pro calculator and every reference table, forever, on your Apple ID. Prop pitch planning, shaft torque, bilge pump sizing, hydraulic cylinder force, Beaufort references — all in. Stow it in your pocket, keep it on the bridge, or pin it to the engine room iPad. Boat & Marine Engine Toolkit is built to be the quick, quiet answer to the everyday marine engine and offshore questions that keep boats running and crews safe.
Screenshots
Verdict
The clearest difference is in-app purchases: Sensor at none against Boat Calculator's 1. Boat Calculator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price 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. Boat Calculator sells 1 one-off in-app purchase. Sensor asks for nothing beyond the download.
Sensor ships an update every 2 months, Boat Calculator every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Sensor | Boat Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 27.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 48 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Volker Schmitt | Shanghai Sheyuan Network Technology Co., Ltd. |
In-app purchases
Sensor
No in-app purchases
Boat Calculator
- Unlock All Calculators$12.99









