Comparison

e85Cal vs HighwayRadar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

e85Cal

This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.

Highlights
  • Calculate ethanol percentage goal
  • Enter gas tank size
  • Input standard pump gas ethanol %
  • Input ethanol pump gas ethanol %
  • Set target ethanol % mix
  • Enter current fuel level %
Features
Read full description

e85Cal help you calculate your ethanol percentage goal. It fast, simple, and easy to use. Just enter the following information: 1) How big is your gas tank? 2) What is the ethanol % in the standard pump gas? 3) What is the ethanol % in the ethanol pump gas? 4) What is your target ethanol % mix goal? 5) What is your current ethanol % min in your vehicle? 6) What is your current fuel level % in your vehicle? Results will display how many gallons or liters of standard and ethanol gas to pump in your vehicle based on your input.

About

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.

Highlights
  • 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
Features
Read full description

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

e85Cal2 screens
HighwayRadar4 screens

Verdict

The call

The clearest difference is in-app purchases: e85Cal at none against HighwayRadar's 4. e85Cal also leads on iOS requirement (12.1 vs 16.0). HighwayRadar's advantage is update cadence (every 9 days vs every 4 months) and ratings volume (129 vs 35). On price, rating, review sentiment and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HighwayRadar sells 4 in-app purchases, starting at $4.99 per month. e85Cal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for e85Cal against 4.6 for HighwayRadar. Both are backed by a comparable volume of ratings — 35 and 129 respectively. Written reviews are what separate them: 82% of e85Cal's written reviews are positive against 80% of HighwayRadar's.

UpkeepUpdate frequency

e85Cal ships an update every 4 months, HighwayRadar every 9 days. The most recent releases landed on July 23, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 5 level
e85Cal versus HighwayRadar: the parameters behind the verdict, then further details
Parametere85CalHighwayRadar
PriceFreeFree
Rating4.7 (35 ratings) — better4.6 (129 ratings)
Positive reviews81.8% of reviews — better80.5% of reviews
Number of ratings35129 — better
Update frequencyEvery 4 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.1 — better16.0
Further details — not scored
Size15 MB144 MB
Age rating4+4+
DeveloperMichael JoeBlue Ridge Software Development LLC

Customer experience

e85Cal

All ratings35 ratings
Positive91.4%
Neutral0.0%
Negative8.6%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

HighwayRadar

All ratings129 ratings
Positive89.9%
Neutral2.3%
Negative7.8%
Written reviews41 reviews
Positive80.5%
Neutral9.8%
Negative9.8%

In-app purchases

None

e85Cal

No in-app purchases

4 purchases

HighwayRadar

Subscriptions4
  • Monthly3 Days trial$4.991 Month
  • Family Discount7 Days trial$14.991 Year
  • Annual7 Days trial$14.991 Year
Show 1 more
  • Family7 Days trial$24.991 Year

Questions

Is e85Cal free?
e85Cal is free to download, with no in-app purchases.
Is HighwayRadar free?
HighwayRadar is free to download, with in-app purchases available.
Which has better reviews, e85Cal or HighwayRadar?
e85Cal is rated higher. e85Cal averages 4.7 out of 5 from 35 ratings, while HighwayRadar averages 4.6 from 129 ratings.
Do e85Cal or HighwayRadar have ads?
Neither e85Cal nor HighwayRadar shows ads.
Which is updated more often, e85Cal or HighwayRadar?
e85Cal ships an update every 4 months, and HighwayRadar every 9 days. Most recently, e85Cal was updated on July 23, 2026 and HighwayRadar on September 25, 2026.

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