Buoyancy Calc vs HighwayRadar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Buoyancy Calc
Calculate the optimal weight for scuba diving based on environmental factors. Input your weight, water type, tank, and exposure suit to get a suggested weight for neutral buoyancy.
- Calculate suggested diving weight
- Adjust for water type
- Adjust for tank type
- Adjust for exposure suit
- Supports pounds and kilograms
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Quickly find out the suggested weight you should add when scuba diving in different environments. Based on PADI's Peak Performance Buoyancy basic weighting guideline*. Enter your weight in pounds or kilograms, and additionally set the type of water, tank, and exposure suit to dial in a suggested amount of weight to help keep you neutrally buoyant. *Note that this app and the developer are not officially a representative of PADI. This app will give the user a good estimate of the weight needed for the environment selected, but there are always adjustments needed to achieve peak performance, based on gender, physique, exposure suit age, accessories, etc.
HighwayRadar
This app provides real-time alerts for speed traps, cameras, and aircraft enforcement using crowd-sourced data and a comprehensive database. It also intelligently controls compatible radar detectors, offering customizable alert modes and audio notifications to enhance your driving awareness.
- Crowd-sourced police and camera alerts
- Worldwide speed and redlight camera database
- Aircraft speed enforcement alerts
- Heat maps and risk score for speed traps
- Intelligent radar detector control
- Customizable alert modes and audio notifications
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Drive with confidence. HighwayRadar gives you a heads-up about speed traps, enforcement, and cameras ahead so you can keep your eyes on the road and avoid surprises. Now with Apple CarPlay. Whether you're commuting, road-tripping, or just running errands, HighwayRadar helps you stay aware of what's coming up on your route with no expertise required. Open the app, start driving, and get clear, timely alerts. Get the peace of mind of knowing what's ahead without taking your attention off the road. WHAT YOU GET • Real-time police alerts shared by a community of drivers, often with the posted speed limit right at the alert location • A worldwide database of speed and red-light cameras, plus a US database of license-plate (ALPR) cameras, updated regularly • Aircraft speed-enforcement alerts that use smart logic to spot patrols trying to stay hidden • Heat maps that reveal where speed traps tend to happen even when no one is reporting right now • A Risk Score tailored to your exact location, time, and day, so you know when to stay extra alert • Local enforcement details where available: radar bands, common tactics, and vehicle descriptions SIMPLE, BUT AS CUSTOMIZABLE AS YOU WANT You don't have to touch a single setting to benefit. But when you're ready to fine-tune, HighwayRadar puts you in control: • Choose how far ahead you want to be warned, or let smart, speed-aware distances handle it for you • Decide which alerts matter: only what's on your street, anything ahead of you, or everything nearby • Turn specific camera types on or off • Filter out older reports and focus on fresh ones • Hear alerts through CarPlay, Bluetooth, or your phone speaker • Flash the screen for a quick visual heads-up when a new alert arrives BUILT FOR CARPLAY AND YOUR CAR • Full CarPlay support with maps, alerts, and easy reporting • A clean speed display showing the current limit alongside your own speed • Automatic zoom as you approach an alert, so you see the detail that matters • Traffic overlay, adjustable map angle and zoom, and a location icon you can personalize • Customizable light and dark themes that can follow your system or the local sunrise and sunset WORKS WITH YOUR RADAR DETECTOR (OPTIONAL) Already own a detector or laser system? HighwayRadar can connect to it and become your all-in-one alert hub, showing radar band, direction, and signal strength, muting weak or unwanted signals automatically, and creating GPS lockouts so the false alarms you pass every day stop bothering you (even if your detector doesn't have this functionality). Supported hardware includes Uniden R8/R4/R9 (and "w" models), Valentine V1 Gen2, Radenso DS1, and AL Priority. You can even hear spoken readouts of the detected band and direction, a favorite of motorcycle riders and anyone who'd rather keep their eyes up. WHY DRIVERS CHOOSE HIGHWAY RADAR • Awareness that goes beyond live reports, thanks to heat maps and Risk Score • Cameras, aircraft, police alerts, and radar, all in one place • Thoughtful controls that stay out of your way until you want them • Battery-friendly Power Save mode that winds the app down when you're parked GREAT FOR EVERY KIND OF DRIVE • Ideal for daily commutes and long road trips alike • Keeps frequent travelers aware of cameras and enforcement in unfamiliar cities • Inspired by and perfect for cross-country driving events where you're on the road all day • Takes the guesswork out of what's around the next bend Head out knowing what's ahead. Try HighwayRadar and see the difference a little awareness makes on every drive. Subscription required. Works in miles or kilometers. Signal-direction recognition is available on Uniden R8/R8w, R9/R9w, and Valentine V1 Gen2. See the EULA here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: HighwayRadar at 4.6 against Buoyancy Calc's 3.1. HighwayRadar also leads on review sentiment (79% vs 40%) and update cadence (every 9 days vs every 3 months). Buoyancy Calc's advantage is in-app purchases (none vs 4). On price, ads, device support and iOS requirement 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. HighwayRadar sells 4 in-app purchases, starting at $4.99 per month. Buoyancy Calc asks for nothing beyond the download.
HighwayRadar holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: HighwayRadar has 151 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 40% of Buoyancy Calc's written reviews are positive against 79% of HighwayRadar's.
Buoyancy Calc ships an update every 3 months, HighwayRadar every 9 days. Both last shipped on November 3, 2026.
| Parameter | Buoyancy Calc | HighwayRadar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (25 ratings) | 4.6 (151 ratings) — better |
| Positive reviews | 40.0% of reviews | 78.7% of reviews — better |
| Number of ratings | 25 | 151 — better |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 160 MB |
| Age rating | 4+ | 4+ |
| Developer | Eric Hamiter | Blue Ridge Software Development LLC |
Customer experience
Buoyancy Calc
HighwayRadar
In-app purchases
Buoyancy Calc
No in-app purchases
HighwayRadar
- Monthly3 Days trial$4.991 Month
- Family Discount7 Days trial$14.991 Year
- Annual7 Days trial$14.991 Year
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- Family7 Days trial$24.991 Year
Questions
Is Buoyancy Calc free?
Is HighwayRadar free?
Which has better reviews, Buoyancy Calc or HighwayRadar?
Do Buoyancy Calc or HighwayRadar have ads?
Which is updated more often, Buoyancy Calc or HighwayRadar?
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