Comparison

OBDify Car Diagnostic vs DTC

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

Head to head
About

OBDify Car Diagnostic

Features
Read full description

OBDify is a professional diagnostic and programming application for FCA / Mopar vehicles β€” Jeep, Dodge, RAM and Chrysler. Connect a compatible Bluetooth OBD-II adapter (e.g. ELM327, vLinker MS or OBDLink MX+) for dealer-level access to module information, fault codes, live data, actuator tests and 175+ guided procedures. The app communicates directly with supported control modules and offers clear, structured tools for reading faults, monitoring live data, testing components, editing configurations and following guided service procedures. With its intuitive interface, OBDify is suitable for both drivers and workshops who need fast, reliable access to FCA diagnostics β€” no laptop, no dealer visit. ---------- PLANS FREE - Read configuration parameters - Read error codes (DTCs) - Shareable diagnostic reports PREMIUM β€” subscription, unlimited vehicles - Everything in Free - Read & clear error codes - Live data monitoring - Actuator tests - Works on every car you plug into VEHICLE UNLOCK β€” one-time purchase, one vehicle, no subscription - Everything in Premium, for one vehicle - Edit configuration parameters - Guided service procedures - Configuration backup & restore Choose Premium for core diagnostics across unlimited cars, or unlock the complete app for a single vehicle with a one-time payment β€” no subscription required. ---------- SUPPORTED VEHICLES OBDify works with OBD-II compatible vehicles, with extended functionality for: Jeep, Dodge, RAM, Chrysler, Alfa Romeo, Fiat, Lancia, Maserati and other FCA-based platforms. For support: contact@obdify.net ---------- SUBSCRIPTION INFORMATION - OBDify Premium is an auto-renewable subscription, available in Monthly and Annual plans - A free trial is available with each plan - The exact price and trial length are shown in the app, in your local currency, before you confirm - Subscription automatically renews unless cancelled at least 24 hours before the end of the current period - Manage or cancel anytime in your device Account Settings - Vehicle Unlock is a one-time purchase, not a subscription Privacy Policy: https://obdify.net/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Vehicle Use Terms: https://obdify.net/terms/

About

DTC

Features
Read full description

DTC-TOOL turns your iPhone into a pocket scanner for heavy-duty trucks. Designed for owner-operators, truck drivers and small fleets needing roadside self-checks and workshop-grade fault reading β€” no bulky bench scanner required. β€’ Read DTCs – active/historical fault codes with plain-language fixes (Cummins, Detroit, Volvo, Mack, Freightliner, Isuzu, HINO & more, auto-detects J1939/J1708 protocols) β€’ Clear DTCs – clear stale fault codes after a repair and get back on the road β€’ Live PID stream – voltage, oil pressure, coolant temp, RPM, load, DPF soot load in real time β€’ DPF care – parked regeneration & soot load reset guidance (ECU-permitted only) β€’ VIN reading & ECU parameter viewing – read-only by default; write operations are only permitted when allowed by the vehicle ECU β€’ Offline session logs – past scans saved locally to track vehicle trends between service visits How it works: Plug a Bluetooth OBD adapter into your truck, launch the app, and it auto-pairs. No manual protocol configuration required. No OBD adapter on hand? Tap the Help Center​ tab β†’ Demo mode​ to instantly load a sample J1939 truck: active/historical DTCs, live PID chart, DPF soot status, and clear-DTC flow. No Bluetooth dongle or vehicle required. Note: DTC-TOOL is a diagnostic viewer/guide tool. It does not stream cloud telematics and cannot replace OEM software. Support: [http://www.dtc-tool.com]

Screenshots

OBDify Car Diagnostic4 screens
DTC4 screens

Verdict

The call

The clearest difference is in-app purchases: DTC at none against OBDify Car Diagnostic's 6. DTC also leads on ads (none vs shown). OBDify Car Diagnostic's advantage is update cadence (fortnightly vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. OBDify Car Diagnostic sells 6 in-app purchases, starting at $4.99 per month. DTC asks for nothing beyond the download.

UpkeepUpdate frequency

OBDify Car Diagnostic ships an update fortnightly, DTC every 5 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
OBDify Car Diagnostic versus DTC: the parameters behind the verdict, then further details
ParameterOBDify Car DiagnosticDTC
PriceFreeFree
Update frequencyFortnightly β€” betterEvery 5 weeks
AdsYesNo β€” better
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details β€” not scored
Size64 MB46 MB
Age rating4+4+
DeveloperOBDifyShenzhen Huansheng Intelligent Co., Ltd

In-app purchases

6 purchases

OBDify Car Diagnostic

Subscriptions2
  • OBDify Premium (Monthly)7 Days trial$4.991 Month
  • OBDify Premium (Annual)14 Days trial$47.991 Year
One-time4
  • Unlock 1 VIN$19.99
  • Unlock 3 VINs$49.99
  • Unlock 10 VINs$119.99
Show 1 more
  • Unlock 25 VINs$199.99
None

DTC

No in-app purchases

Questions

Is OBDify Car Diagnostic free?
OBDify Car Diagnostic is free to download, with in-app purchases available.
Is DTC free?
DTC is free to download, with no in-app purchases.
Do OBDify Car Diagnostic or DTC have ads?
OBDify Car Diagnostic shows ads; DTC does not.
Which is updated more often, OBDify Car Diagnostic or DTC?
OBDify Car Diagnostic ships an update fortnightly, and DTC every 5 weeks. Most recently, OBDify Car Diagnostic was updated on October 28, 2026 and DTC on October 31, 2026.

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