Comparison

Magnus App 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

Magnus App

Remotely monitor your tank levels with this application. Connect to your Magnus monitor to view real-time data and gain peace of mind about your tank's status.

Highlights
  • Remote tank level monitoring
  • Connect to Magnus monitor
  • Real-time data viewing
  • Peace of mind for tank management
Features
Read full description

Magnus App allows you to connect with your own Magnus monitor and remotely view the level of your tank. It takes care of your tank and gives you that peace of mind that you always wanted.

About

OTR Diagnostics

This app helps heavy-duty truck owners diagnose and resolve common issues like fault codes, regen problems, and derates. It provides plain-language explanations of error codes, allows for bi-directional commands to fix issues, and monitors live truck data to prevent downtime.

Highlights
  • AI-powered fault code explanation
  • Bi-directional commands for repairs
  • Reset active/inactive fault codes
  • Run forced DPF/SCR regens
  • Live data monitoring
  • Fault code history tracking
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

Magnus App4 screens
OTR Diagnostics4 screens

Verdict

The call

The clearest difference is update cadence: OTR Diagnostics at fortnightly against Magnus App's every 3 months. OTR Diagnostics also leads on review sentiment (55% vs 39%). Magnus App's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (15.1 vs 17.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Magnus App ships an update every 3 months, OTR Diagnostics fortnightly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Magnus App versus OTR Diagnostics: the parameters behind the verdict, then further details
ParameterMagnus AppOTR Diagnostics
PriceFreeFree
Rating—4.0 (99 ratings) — better
Positive reviews38.9% of reviews55.2% of reviews — better
Number of ratings—99 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.6
Further details — not scored
Size44 MB267 MB
Age rating4+4+
DeveloperEirscope LimitedOTR Performance

Customer experience

Magnus App

Written reviews18 reviews
Positive38.9%
Neutral5.6%
Negative55.6%

OTR Diagnostics

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

Bugs and requests

Magnus App

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

None

Magnus App

No in-app purchases

None

OTR Diagnostics

No in-app purchases

Questions

Is Magnus App free?
Magnus App is free to download, with no in-app purchases.
Is OTR Diagnostics free?
OTR Diagnostics is free to download, with no in-app purchases.
Do Magnus App or OTR Diagnostics have ads?
Neither Magnus App nor OTR Diagnostics shows ads.
Which is updated more often, Magnus App or OTR Diagnostics?
Magnus App ships an update every 3 months, and OTR Diagnostics fortnightly. Most recently, Magnus App was updated on October 12, 2026 and OTR Diagnostics on October 24, 2026.

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