Webcam Widgets vs Boat Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Webcam Widgets
Display live images from the web directly on your Home Screen. Track weather, charts, or any live image feed with customizable widgets. Share images easily with friends.
- Customizable Home Screen widgets
- Live image updates from web URLs
- Track weather, charts, and webcams
- Share images from widgets
- Supports JPEG, JPG, and PNG URLs
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ImageTracker lets you add image widgets to your Home Screen with live images from the web which update with realtime information. You can use it to track a weather cameras, various charts and figures, or anything live image you can think of! ImageTracker is the spiritual successor of SlothCam, the original webcam app for Dashboard, MacOS, and iOS, and it offers similar features to SlothCam, but in a modern Home Screen Widget format. With this app you can create widgets using any live image from the web (jpeg, jpg, png URLs). Whether it’s a satellite image of the Earth, a real-time weather forecast, space weather charts showing aurora data, or a live webcam feed, this app allows you to create dynamic widgets with live content from the web. To install a Home Screen Widget, tap and hold on your Home Screen until the icons jiggle and press + to add a widget. Once you add the widget, you can tap it while in Home Screen edit mode and add a custom URL to the widget. Features: •Customizable Widgets: Place any image URL into a Home Screen widget on your iPhone or iPad or Mac. •Live Updates: Widgets refresh periodically to display the latest data, ensuring your information is always current. •Versatile Use Cases: Ideal for displaying weather maps, NASA satellite images, live webcams, space weather charts, aurora borealis data, and more. Any image published to the web can be used! •Easily share images from widgets with friends. ImageTracker is free to use. Purchasing the app removes the in-app ad banner and the nag message that appears on the widget, and allows you to customize widgets with title text for each webcam image. Privacy Policy: https://catspaw-systems.com/PrivacyPolicies/ImageTrackerPrivacy.html
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 update cadence: Webcam Widgets at every 9 days against Boat Calculator's every 3 weeks. On price, 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
Both are free to download. Webcam Widgets sells 2 one-off in-app purchases and Boat Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Webcam Widgets ships an update every 9 days, Boat Calculator every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Webcam Widgets | Boat Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (10 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 64 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Catspaw Systems LLC | Shanghai Sheyuan Network Technology Co., Ltd. |
In-app purchases
Webcam Widgets
- ImageTracker Pro$6.99
- Image History$14.99
Boat Calculator
- Unlock All Calculators$12.99









