Comparison

OBDII Trouble Codes vs Simfly Companion

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

Head to head
About

OBDII Trouble Codes

Access a comprehensive offline database of over 18,500 diagnostic trouble codes for cars. Simply enter a fault code to get detailed descriptions without needing an internet connection or car model selection.

Highlights
  • Offline OBD2/EOBD code database
  • Over 18,500 error descriptions
  • No internet connection required
  • Simple fault code entry
  • Supports generic and manufacturer-specific codes
  • Copy and paste error descriptions
Features
Read full description

This app is the most complete offline OBD2 (EOBD) diagnostic trouble code definitions database. It contains more than 18500 error descriptions. It is the most full database in market. Very simple to use! You don't even have to select your car model. Just enter your fault code and app will show you all supported descriptions. No Internet connection needed, no longer spend hours to search for single code description, looking at check engine light. If you have usb, bluetooth or WiFi OBDII code reader (ELM327, PLX Kiwi or any other) you need this app for code description because most of code scanners does not contain full DTC (diagnostic trouble code) database and displays only meaningfull numbers. Be prepared for any troubles wherever you are! You can select and copy error description with simple long press on text, and then paste it in SMS, e-mail or wherever you want! If your car supports OBD II or EOBD, then you can already use almost 5000 generic OBDII codes. These codes are from PowerTrain series (P0XXX, P2XXX, P34XX), Body Series (B0XXX), Chassis series (C0XXX), Network series (U0XXX, U2XXX, U3XXX). Also there is a list of more than 13500 additional manufacturer specific codes. Supported manufacturers with specific codes: Acura Alfa Romeo BMW Chrysler / Dodge / Jeep Citroen / Peugeot Daewoo Fiat Ford Geo GM (Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac) Honda Hyundai Infinity Isuzu Jaguar Kia Lamborghini Land Rover Lexus Lincoln Mazda Mercedes Mercury Mini Mitsubishi Nissan Oldsmobile Opel / Vauxhall Plymouth Porsche Renault (DF codes) Saab Saturn Scion Subaru Suzuki Toyota Volskwagen Audi Group Volvo Note that it is impossible to create complete OBD DTC database. Manufacturers adding new codes and changing old ones. So if you cannot find your code or if you think that some code not correct anymore, please write us!

About

Simfly Companion

Features
Read full description

SF Companion is an unofficial third-party companion app for the Simfly flight simulation network (simfly.io). Track everything that matters to your Simfly account: flights, fleet, airports, licenses, and earnings, all from your iPhone and iPad. FLIGHTS See your active and recent flights in real time. Monitor your current mission’s progress, elapsed time, route, altitude, and ground speed. Keep an eye on friends’ flights and live traffic on your owned aircraft and airports. FLEET Browse your full aircraft inventory with mission status, current location, and callsign. Filter by type, category, or status to find exactly what you’re looking for. AIRPORTS Get a complete overview of your owned airports with live traffic and category filters. Tap any airport to see incoming and outgoing flights at a glance. LICENSES Track your license progress and status across all your accounts in one unified view. EARNINGS Break down your PAX earnings by category: licenses, owned aircraft, owned airports, airport visits, bonuses, and rentals. Switch between current week, last week, and last month ranges instantly. GOALS Set asset purchase goals and see a days-to-afford estimate based on your recent earnings. Stay focused on what you’re saving toward. STATS View your pilot stats fetched directly from your Simfly account. MULTI-ACCOUNT SUPPORT Add and manage multiple Simfly accounts. Switch between them seamlessly across all views. SHAKE FOR PAX SNAPSHOT Shake your device at any time to get an instant PAX snapshot across all your accounts. No need to navigate anywhere. SF Companion is an independent project and is not affiliated with or maintained by Simfly. All flight and account data is fetched from Simfly’s public network.

Screenshots

OBDII Trouble Codes3 screens
Simfly Companion4 screens

Verdict

The call

The clearest difference is price: Simfly Companion at Free against OBDII Trouble Codes's $3.99. Simfly Companion also leads on update cadence (every 3 weeks vs every 25 months). OBDII Trouble Codes's advantage is iOS requirement (13.0 vs 17.0). On 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

Simfly Companion is free to download; OBDII Trouble Codes costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

OBDII Trouble Codes ships an update every 25 months, Simfly Companion every 3 weeks. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.

Scorecard3 real differences · 5 level
OBDII Trouble Codes versus Simfly Companion: the parameters behind the verdict, then further details
ParameterOBDII Trouble CodesSimfly Companion
Price$3.99Free — better
Positive reviews21.4% of reviews—
Update frequencyEvery 25 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size54 MB48 MB
Age rating4+4+
DeveloperOleg ChumakovMatheo Fiebiger

In-app purchases

None

OBDII Trouble Codes

No in-app purchases

None

Simfly Companion

No in-app purchases

Questions

Is OBDII Trouble Codes free?
OBDII Trouble Codes costs $3.99, with no in-app purchases.
Is Simfly Companion free?
Simfly Companion is free to download, with no in-app purchases.
Do OBDII Trouble Codes or Simfly Companion have ads?
Neither OBDII Trouble Codes nor Simfly Companion shows ads.
Which is updated more often, OBDII Trouble Codes or Simfly Companion?
OBDII Trouble Codes ships an update every 25 months, and Simfly Companion every 3 weeks. Most recently, OBDII Trouble Codes was updated on November 1, 2026 and Simfly Companion on October 22, 2026.

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