Comparison

Radius vs OTR Diagnostics

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

Head to head
About

Radius

Visualize distances and areas on a map with customizable radius circles. Easily track multiple locations, plan delivery zones, or check what's within reach. Offers precise location finding and personalized visualization tools.

Highlights
  • Create radius circles on any map
  • Visualize distance in various units
  • Track multiple named and color-coded locations
  • Find any location by pin, address, or coordinates
  • Customizable radius names and colors
  • Save unlimited radii
  • Automatic current location radius
Features
Read full description

Radius: Distance From Me See exactly what's within reach. Create beautiful radius circles on any map and visualize distance like never before. Whether you're checking what's within walking distance of home, planning delivery zones, or tracking multiple important locations — Radius makes it effortless. SIMPLE & POWERFUL Set your distance, choose your units (miles, kilometers, meters, feet, or nautical miles), and instantly see your radius displayed on the map. It's that easy. TRACK MULTIPLE LOCATIONS Create and manage multiple radii for all the places that matter. Your home, office, favorite spots — organize your world with named, color-coded radius circles you can switch between instantly. FIND ANY LOCATION Drop a pin anywhere on the map, search by address, or enter precise coordinates. Perfect for planning, research, or when you need pinpoint accuracy. PREMIUM FEATURES Unlock the full experience: • Custom names for each radius ("Home Office", "School Zone", "Gym") • Vibrant color palette to personalize every circle • Save unlimited radii that persist across sessions • Current location radius that updates automatically as you move From casual distance checks to maritime navigation and professional location planning — Radius gives you the tools to visualize your world.

About

OTR Diagnostics

This diagnostic tool helps heavy-duty truck owners understand and resolve fault codes, perform crucial maintenance tasks like regens, and monitor live engine data. It aims to reduce downtime and avoid costly dealer visits by empowering users with detailed insights and control over their vehicle's systems.

Highlights
  • Reset active and inactive fault codes
  • Perform forced DPF/SCR regens
  • Understand fault codes in plain language
  • Monitor live engine data
  • Track fault code history
  • Bi-directional commands for repairs
Features
Read full description

OTR Diagnostics — Trusted by 10,000+ Truck Owners Dealing with regen problems, nonstop alerts, fault codes, and unexpected derates on your heavy duty truck? You are not alone. More than 10,000 truck owners and fleets trust OTR Diagnostics to take control, cut downtime, and avoid expensive dealer visits. Powered by OTR Assist + OTR LINK 2 This is more than a scan tool. OTR Assist is your AI partner, breaking down fault codes in plain language and helping you troubleshoot and decide if you can keep driving or need service now. Paired with OTR LINK 2, our proprietary Bluetooth adapter, you get faster connection speeds, more accurate fault code data, and more live data parameters than ever before. It is 5X better than previous hardware. Ask us how to get a FREE upgrade today. Commands That Keep You Moving With bi-directional commands built right into OTR Diagnostics, you are no longer stuck waiting on a shop to do what you can handle yourself. Reset active and inactive fault codes Reset the entire aftertreatment system Reset derates that slow you down Reset soot levels after a DPF service Run forced DPF or SCR regens right from the cab These commands put you back in control, saving you time, money, and downtime. Fault Code Insights Go beyond a flashing dash light. OTR Diagnostics helps you understand fault codes with the same level of detail as dealer software, but in plain language you can actually use. Decode your dash lights Uncover the root causes of issues Track how often a problem occurs Know which repairs or parts are needed Live Data Monitoring Want to know if your regen is working? Want to monitor exhaust temps, soot levels, or DEF? OTR Diagnostics lets you see your truck’s vitals in real time so you can spot issues before they stop you. Common live data parameters include: DPF fluid level DPF soot level EGR valve position Aftertreatment exhaust temps Boost pressure Accelerator pedal position Engine fuel delivery pressure Available live data may vary depending on the engine model your device is connected to. Explore Your History Recurring problems? OTR Diagnostics logs every fault code and command so you can see when issues happened, when they were cleared, and how long regens lasted. Proven. Tested. Backed by Support We run OTR Diagnostics, OTR Assist, and OTR LINK 2 on our own fleet of test trucks including late model Paccar MX engines to make sure everything works before it reaches you. That is why more than 10,000 drivers already trust OTR Diagnostics. Made in Michigan. Built for You We engineer, assemble, and ship right from our shop in Macomb, MI. If you are nearby, stop in and see us. Coverage We support a wide range of heavy duty engines: Cummins: CM871, CM2150, CM2250, CM2350 (2008–2024) Detroit Diesel: DD60, MBE, DD13, DD15, DD16 (2008–2024) Paccar: MX11, MX13 (2011–2024), PX7, PX9 (2008–2024) Volvo: D11, D13, D13TC, D16 (2014–2024) Mack: MP7, MP8, MP8HE, MP10 (2014–2024) For the full list of compatible models, call or text us at 586-799-4375. Need Help or Have Questions? Call or text us anytime at 586-799-4375 or email support@otrperformance.com.

Screenshots

Radius4 screens
OTR Diagnostics4 screens

Verdict

The call

The clearest difference is rating: OTR Diagnostics at 4.0 against Radius's 3.2. OTR Diagnostics also leads on in-app purchases (none vs 2) and update cadence (weekly vs every 3 months). On price, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Radius sells 2 one-off in-app purchases. OTR Diagnostics asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OTR Diagnostics holds the better App Store score, 4.0 against 3.2. Both are backed by a comparable volume of ratings — 26 and 99 respectively. Written reviews complicate that: 58% of Radius's written reviews are positive against 55% of OTR Diagnostics's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Radius ships an update every 3 months, OTR Diagnostics weekly. Both last shipped on November 3, 2026.

Scorecard5 real differences · 5 level
Radius versus OTR Diagnostics: the parameters behind the verdict, then further details
ParameterRadiusOTR Diagnostics
PriceFreeFree
Rating3.2 (26 ratings)4.0 (99 ratings) — better
Positive reviews58.3% of reviews — better55.2% of reviews
Number of ratings2699 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.6 — better
Further details — not scored
Size16 MB268 MB
Age rating4+4+
DeveloperHistorycentral.comOTR Performance

Customer experience

Radius

All ratings26 ratings
Positive53.8%
Neutral3.8%
Negative42.3%
Written reviews36 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

OTR Diagnostics

All ratings99 ratings
Positive70.7%
Neutral7.1%
Negative22.2%
Written reviews58 reviews
Positive55.2%
Neutral10.3%
Negative34.5%

Bugs and requests

Radius

Not enough reviews yet to summarise bugs or requests.

OTR Diagnostics

Reported bugs

10 issues
  • App constantly disconnects from device
  • Generic code option disappeared
  • Forced regen is no longer consistent
  • AI assistant not working
  • App asks to do things not available in app
Show 5 more
  • Bluetooth connection rejects
  • App doesn't work without data connection
  • Forced regen not activating after updates
  • Login authentication errors
  • Cannot start regen process on newer models

Requested features

5 requests
  • Remember email address for login
  • Allow offline functionality without data connection
  • Add option to change speed
  • More detailed diagnostic information
  • Allow basic subscription to work on multiple VINs

In-app purchases

2 purchases

Radius

One-time2
  • Radius Premium$3.99
  • Radius Premium & Coffee$7.99
None

OTR Diagnostics

No in-app purchases

Questions

Is Radius free?
Radius is free to download, with in-app purchases available.
Is OTR Diagnostics free?
OTR Diagnostics is free to download, with no in-app purchases.
Which has better reviews, Radius or OTR Diagnostics?
OTR Diagnostics is rated higher. Radius averages 3.2 out of 5 from 26 ratings, while OTR Diagnostics averages 4.0 from 99 ratings.
Do Radius or OTR Diagnostics have ads?
Neither Radius nor OTR Diagnostics shows ads.
Which is updated more often, Radius or OTR Diagnostics?
Radius ships an update every 3 months, and OTR Diagnostics weekly. Most recently, Radius was updated on November 3, 2026 and OTR Diagnostics on November 3, 2026.

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