CarDiag vs ForgePilot Diagnostics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CarDiag
Diagnose vehicle issues, turn off the check engine light, and manage maintenance digitally. This app provides insights into car problems, repair tips, and cost estimations, empowering users to handle car diagnostics independently.
- Automatic OBD2 diagnostics
- Manual fault identification
- Reset check engine light
- Digital maintenance book
- DIY repair tutorials
- Repair cost estimation
Read full descriptionHide full description
CarDiag : A trusted mechanic in your pocket Diagnose your car, find breakdowns and turn off the check engine light ! CarDiag : Your Easy Car Diagnostic - OBD2 Thanks to its connected device and its free and intuitive mobile application, CarDiag allows motorists to diagnose their vehicle easily, independently and at a lower cost (breakdowns, wear of components and pollution). The "CarDiag" application supports motorists from "A" to "Z" in the diagnostic, maintenance and repair of their vehicle independently and cheaply : since the doubt of a problem, the identification of the fault, a diagnostic in simple and easy-to-understand terms and a pollution score, Do-it-yourself auto repairs, tips to buy parts as well as a cost estimation at the nearest mechanic. It also provide a digital maintenance book. Features : - Automatic Diagnostic : Equipped with an OBD2 bluetooth device (easy to get and available for less than 10$), CarDiag provides a complete list of your car problems in simple and easy-to-understand terms. - Manual Diagnostic : Cardiag provides assistance for a direct diagnostic by the user (visual defects, noise, smells, etc.) - Reset the Check Engine Light (MIL) : The check engine light comes on to indicate a malfunction in the engine or the pollution control system. CarDiag allows you to reset this malfunction indicator lamp. - Maintenance Book : digitize and store all repairs made by the user or a professional with attached invoices. - Tutorials for Do-it-yourself Auto Repair, and tips to buy Car Parts - Car repair cost estimation at the nearest mechanic - Routine vehicle maintenance : Perform a regular vehicle check-up, pre-vehicle inspection or before buying a car We have all done the same observation when we take our vehicle to a garage : the mechanic diagnoses possible breakdowns using a dedicated diagnostic tool. This simple diagnostic is billed around 50 dollars, in addition of potential repairs which it is difficult to evaluate the real cost and the necessity. However, sometimes a simple reset of the on-board computer can solve many "electronic problems", a feature available in the "CarDiag" application. Prerequisites: to use the Cardiag application, you should : * Have an OBD-II compatible car : OBD-II is compatible with all US vehicle models since 1996, European since 2001 (diesel since 2003), Japanize since 2006. * Have a CarDiag device (OBD2) : easy to get and available on our website/Amazon... Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ForgePilot Diagnostics
Read full descriptionHide full description
Built by a technician who's actually turned wrenches for 20 years, ForgePilot is the AI diagnostic co-pilot you wish you had at the bay. Pull a code. Scan a VIN. Ask Forgy what's likely. Get a real answer — grounded in OEM procedures, your shop's history, and the kind of diagnostic logic that takes a decade to learn. WHAT YOU GET - Forgy — an AI co-pilot trained for automotive diagnostics. Ask it about any DTC, any vehicle, any symptom. Get a focused diagnostic path, not a wall of generic text. - MOTOR-licensed procedures, torque specs, and DTC flowcharts — straight from the source, viewed in-app, never bounced to a browser. - Live OBD2 streaming via Bluetooth — pair your existing scanner (OBDLink MX+, Autel, Launch, others) and stream PIDs, freeze frame data, and live sensor readings in real time. - VIN scanner with camera + barcode + AI fallback — get the right vehicle profile in seconds. - Multi-format scanner screenshot support — snap a photo of any scan tool's screen, paste it into Forgy chat, get an analysis. - Vehicle history that persists — every car your shop touches builds a record. Pull it up next time. BUILT FOR SHOPS, NOT CONSUMERS ForgePilot isn't an OBD2 toy or a parts-buying app. It's a professional diagnostic tool for working technicians at independent shops. If you've ever wished your scanner had a brain — this is it. YOUR DATA IS YOURS We never sell your shop data. We never sell your customer info. We never train AI on your individual repair orders without permission. Read the full privacy policy at crimsonforge.pro/privacy — it's written in plain English. QUESTIONS? Reach us at admin@crimsonforge.pro. Designed in Colorado by Crimson Forge, Inc.
Screenshots
Verdict
The clearest difference is ads: ForgePilot Diagnostics at none against CarDiag's shown. ForgePilot Diagnostics also leads on update cadence (fortnightly vs every 5 weeks). On price, in-app purchases, device support and iOS requirement 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.
CarDiag ships an update every 5 weeks, ForgePilot Diagnostics fortnightly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | CarDiag | ForgePilot Diagnostics |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 14 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | HI GROUP | Crimson Forge Inc |
In-app purchases
CarDiag
No in-app purchases
ForgePilot Diagnostics
No in-app purchases
Questions
Is CarDiag free?
Is ForgePilot Diagnostics free?
Do CarDiag or ForgePilot Diagnostics have ads?
Which is updated more often, CarDiag or ForgePilot Diagnostics?
Other comparisons















