Comparison

J1939OBD vs xHP Flashtool

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

Head to head
About

J1939OBD

Features
Read full description

A diagnostic app for industrial and commercial vehicle engines using the J1939 CAN protocol. The app supports the following functions: - Display the active error codes - Display the passive error codes - Delete the error codes - Display of engine measured values - Information about the status DPF - Information about the SCR system - Information about fuel consumption - Engine information - Terminal mode To connect to the engine you need an EML327 compatible Wifi OBD interface as of V1.4 and a connection cable from the diagnostic connector to OBD. Various manufacturers offer corresponding cables, as well as a well-known engine manufacturer from Cologne, who distributes a corresponding adapter cable via his dealer network. Visit my homepage for further informations. An EML327 Wifi interface is offered on known Internet platforms.

About

xHP Flashtool

This app offers a complete tuning solution for ZF automatic and DCT transmissions. It allows users to customize their transmission's behavior, from smooth and comfortable to race-ready performance, directly from their Apple devices. Unlock the full potential of your vehicle's transmission.

Highlights
  • ZF transmission tuning
  • Customizable shift behavior
  • OTS map selection
  • DCT transmission support
  • iOS/iPadOS/Mac M1 compatibility
  • Multiple adapter options
Features
Read full description

xHP Flashtool is the worldwide first and complete Tuning solution for your ZF6HP, ZF8HP Automatic or 7-Speed DCT transmission. xHP is the only tool that focuses fully on getting the best from your Auto-Transmission and is the worldwide leading solution for the best vehicles from Bavaria! xHP put's the power to fully customize your automatic transmission at your hands. Connect your Apple iPhone, IPad or Mac M1 to your car and customize by yourself or choose from pre-defined OTS maps. The ZF Autos are used throughout the whole range, from the 1-Series hatchbacks, to the mighty Alpina and M cars! While the hardware stays widely the same throughout all applications and is mainly divided in only 2 types (6HP19/21 and 6HP26/28 for 6-Speed, 8HP45/50/51 and 8HP70/75/76 for 8-Speed), the software inside the controller makes it possible to adapt the transmission, to every vehicle and mimic a wide range of driver styles. Smooth and comfy in the Luxury applications, the same transmission can be tweaked to deliver snap-on take-off behavior, surprisingly fast shift times and even race-style throttle blips on downshifts. Tweaking your transmission is not only about getting quicker, or holding more power. An automatic transmission is deeply involved into vehicle dynamics and contributes very much to the overall driving experience. From crawling in traffic, over city driving, to taking your vehicle to the drag strip or a race track, the TCU widely defines how your car feels. Like everyone drives different with a manual, the maps inside the TCU hide the secrets to tweak your automatic transmission to your personal likings and finally experience what was once promised in the glossy brochure: Sheer driving pleasure! For a seamless start, please read the manual on needed hardware and prerequisites: https://www.xhpflashtool.com To connect to your car, you have many options: xHP Wifi Adapter (blue), Wifi Thor Adapter, MHD Wifi Adapter (black and orange) or a standard OBD INPA USB or ENET cable! Please check our Connect-Diagram on our website to get further information and sources! https://www.xhpflashtool.com/connect_diagram/

Screenshots

J1939OBD4 screens
xHP Flashtool4 screens

Verdict

The call

The clearest difference is in-app purchases: xHP Flashtool at none against J1939OBD's 1. xHP Flashtool also leads on update cadence (weekly vs every 41 months). J1939OBD's advantage is iOS requirement (12.1 vs 15.0). On price, 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. J1939OBD sells 1 one-off in-app purchase. xHP Flashtool asks for nothing beyond the download.

UpkeepUpdate frequency

J1939OBD ships an update every 41 months, xHP Flashtool weekly. The most recent releases landed on September 18, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
J1939OBD versus xHP Flashtool: the parameters behind the verdict, then further details
ParameterJ1939OBDxHP Flashtool
PriceFreeFree
Rating—4.9 (2.7K ratings) — better
Positive reviews—93.5% of reviews
Number of ratings—2.7K — better
Update frequencyEvery 41 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.1 — better15.0
Further details — not scored
Size14 MB277 MB
Age rating4+4+
DeveloperS.KoepgexAutomotive GmbH

Bugs and requests

J1939OBD

Not enough reviews yet to summarise bugs or requests.

xHP Flashtool

Reported bugs

2 issues
  • App crashes during reflash process
  • Inability to sign out of account with wrong email

Requested features

3 requests
  • Expand compatibility to more vehicle models
  • Offer more affordable licensing options
  • Implement demo/trial mode for potential users

In-app purchases

1 purchases

J1939OBD

One-time1
  • Get full access for 1939OBD$3.99
None

xHP Flashtool

No in-app purchases

Questions

Is J1939OBD free?
J1939OBD is free to download, with in-app purchases available.
Is xHP Flashtool free?
xHP Flashtool is free to download, with no in-app purchases.
Do J1939OBD or xHP Flashtool have ads?
Neither J1939OBD nor xHP Flashtool shows ads.
Which is updated more often, J1939OBD or xHP Flashtool?
J1939OBD ships an update every 41 months, and xHP Flashtool weekly. Most recently, J1939OBD was updated on September 18, 2026 and xHP Flashtool on October 15, 2026.

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