OTR Diagnostics vs YeecoreViewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
YeecoreViewer
Connect to your dash cam to view recorded videos and photos. Stream content directly from the SD card or download files to your phone for easy sharing. Configure dash cam settings and review playback with GPS data.
- Stream dash cam videos online
- Download videos and photos
- Share media on social media
- Playback with GPS track
- Configure dash cam settings
Read full descriptionHide full description
YeecoreViewer is an App for the YEECORE dash cam, compatible for all YEECORE’s products. The main functions of the App: Play the videos. Play the videos online without downloading them from the SD card. Download the videos and photos to your phones and then share them on social media platforms. Playback the local videos with the GPS track information. Set up the dash cam. Submit your question about this App to us.
Screenshots
Verdict
The clearest difference is rating: OTR Diagnostics at 4.0 against YeecoreViewer's 1.9. OTR Diagnostics also leads on update cadence (fortnightly vs every 6 weeks) and review sentiment (55% vs 43%). YeecoreViewer's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (12.0 vs 17.6). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
OTR Diagnostics holds the better App Store score, 4.0 against 1.9. Both are backed by a comparable volume of ratings — 99 and 42 respectively. Written reviews point the same way: 55% of OTR Diagnostics's written reviews are positive against 43% of YeecoreViewer's.
OTR Diagnostics ships an update fortnightly, YeecoreViewer every 6 weeks. Both last shipped on October 15, 2026.
| Parameter | OTR Diagnostics | YeecoreViewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (99 ratings) — better | 1.9 (42 ratings) |
| Positive reviews | 55.2% of reviews — better | 42.9% of reviews |
| Number of ratings | 99 — better | 42 |
| Update frequency | Fortnightly — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 267 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | OTR Performance | Shenzhen Fude Innovation Technology Co., Ltd. |
Customer experience
OTR Diagnostics
YeecoreViewer
Bugs and 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 moreShow fewer
- 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
YeecoreViewer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OTR Diagnostics
No in-app purchases
YeecoreViewer
No in-app purchases









