Comparison

DFirstCoder vs Q

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

Head to head
About

DFirstCoder

This app provides comprehensive vehicle diagnostics and customization for car owners. It offers one-click app features for easy operation, Bluetooth connectivity, and the ability to read/clear trouble codes, perform smog checks, and view live data. It supports a wide range of vehicle models.

Highlights
  • One-click apps for easy operation
  • Comprehensive diagnostic features
  • Bluetooth wireless connectivity
  • Read and clear trouble codes
  • Smog check functionality
  • Live data display
  • Supports VAG, BMW, Mercedes-Benz models
Features
Read full description

DFirstCoder is an equipped with one-click apps feature professional OBDII Scanner App, designed for vehicle users who want to go beyond straightforward diagnostics. It includes comprehensive diagnostic features and customize numerous features of your vehicles with one-click, friendly to use even for beginners. Features: 1.2 in 1 OBDII coder. In addition to comprehensive diagnostic, one-click apps eliminate the need for tedious operation steps, making them easy to understand and operate, even for beginners. 2.Hot update. Updating the features or fixing bugs immediately without needing to update the app, it can respond to users needs and resolve functionality issue quickly. 3.Bluetooth connectivity, DFirstCoder's device supports wireless connection to your phone or tablet , and communicate with your vehicles rapidly. 4.Read & Clear codes, read the trouble codes of your vehicle and clear it. 5.Smog check. 6.MIL status. 7.Live data. 8.Freeze frame. 9.Mode 6 10.Covering a wide range of models, VAG Group, BMW Group, Mercedes-Benz, etc. are available. About DFirstCoder Information ———————————————————————————————————————————————————————————————————————————————————— DFirstCoder is an app to adapt DFirst device, owner of Shenzhen QIXIN Technology Co., LTD. It’s equipped with one-click apps and comprehensive diagnostic features. The app is free to download for user, and some of functions are free to use (e.g. clear temporary trouble codes,date-time synchronization and host reboot etc.). For more details, welcome to follow us, Website:www.dfirstcoder.com Facebook:https://www.facebook.com/qixinglobal Email: support@dfirstcoder.com Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Q

Features
Read full description

Q-Man puts the TDC-100's cue register list on an iPhone or iPad. Connect over your local network through a serial-to-network bridge, download the register set, edit in and out points, clip names, gangs and speeds, then upload the result back to the device. Files are read and written in the same .td2 and .tds formats the desktop app uses, so captures move between machines unchanged. • Full 15-column register table on iPad, list and detail view on iPhone • Timecode keypad built for the job, not the system keyboard • Bulk edits — renumber, clear gangs, shift timecodes — with undo • Automatic bridge discovery, or enter the address yourself • Menu settings download and upload • Built-in demo data, so you can see the app without hardware attached • Diagnostics log and one-tap support bundle A licence is required to connect to a TDC-100. Opening files, editing and the demo work without one.

Screenshots

DFirstCoder3 screens
Q4 screens

Verdict

The call

The clearest difference is in-app purchases: Q at none against DFirstCoder's 8. Q also leads on update cadence (every 2 days vs every 3 weeks). DFirstCoder's advantage is iOS requirement (13.0 vs 17.4). 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. DFirstCoder sells 8 in-app purchases, starting at $108.99 per year. Q asks for nothing beyond the download.

UpkeepUpdate frequency

DFirstCoder ships an update every 3 weeks, Q every 2 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
DFirstCoder versus Q: the parameters behind the verdict, then further details
ParameterDFirstCoderQ
PriceFreeFree
Rating4.8 (5 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.4
Further details — not scored
Size95 MB6 MB
Age rating17+4+
DeveloperShenzhen QiXin Technology Co., Ltd.Liuzzi-Fedun Studios, LLC

In-app purchases

8 purchases

DFirstCoder

Subscriptions2
  • Pro Plan Subscription$108.991 Year
  • Pro Plan Subscription (Family)$158.991 Year
One-time6
  • 350 QD$4.99
  • 700 QD$9.95
  • 1400 QD$19.49
Show 3 more
  • 3500 QD$49.99
  • 7000 QD$96.99
  • 10500 QD$145.99
None

Q

No in-app purchases

Questions

Is DFirstCoder free?
DFirstCoder is free to download, with in-app purchases available.
Is Q free?
Q is free to download, with no in-app purchases.
Do DFirstCoder or Q have ads?
Neither DFirstCoder nor Q shows ads.
Which is updated more often, DFirstCoder or Q?
DFirstCoder ships an update every 3 weeks, and Q every 2 days. Most recently, DFirstCoder was updated on October 7, 2026 and Q on October 2, 2026.

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