YMOBD vs PDFix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YMOBD
This tool connects to your car's OBD adapter via Bluetooth to collect real-time engine data, read fault codes, and provide solutions. It also records driving data, analyzes performance, and offers a HUD display for a safer and more enjoyable driving experience.
- Real-time engine data collection
- Vehicle fault code reading and solutions
- Driving data recording and analysis
- Vehicle performance testing (acceleration, braking)
- HUD display function
- Day and night modes
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YMOBD is a practical too. It has the characteristics of simple operation and accurate data, and is suitable for long-term use by car owners and users. Keep your car away from hidden dangers and make driving fun! Connect and communicate with the OBD adapter via Bluetooth: It can collect car engine data in real time, such as engine speed, ignition time, then correction, water temperature, fuel consumption, etc., with two modes of day and night, with HUD display function. It can read vehicle fault codes and provide professional solutions for detected vehicle fault codes. The driving process of the vehicle can be recorded every time. Analyze and summarize data such as mileage, average fuel consumption, driving time, and driving speed. It can test the acceleration, braking, and other performance of the vehicle, and provide analysis reports.
PDFix
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PDFix turns your iPhone into a full-featured document scanner. Point the camera — the app finds page edges, fixes perspective and removes shadows automatically. Sign, recognize and share the finished PDF in a couple of taps. SCAN ANYTHING • Contracts, invoices, receipts, notes — into a crisp PDF in seconds • Automatic edge detection and perspective correction • Filters for perfect readability: B&W, contrast, color SIGN DOCUMENTS • Draw your signature once — reuse it in any document • Place and resize the signature anywhere on the page RECOGNIZE TEXT (OCR) • Extract text from scans and photos • Copy the result or share it instantly EDIT PAGES • Crop and rotate • Draw and annotate right on the scan • Eraser for removing anything unwanted ORGANIZE & SHARE • Folders for your documents • Scan history • Share PDFs in one tap — to messengers, email or cloud BONUS • Built-in QR code scanner PDFix Pro unlocks everything without limits. The subscription (weekly, monthly or annual) is billed to your Apple ID, renews automatically and can be cancelled anytime in App Store settings at least 24 hours before the current period ends. Privacy Policy: https://pdfix.ydev.top/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
YMOBD and PDFix are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. YMOBD sells 4 one-off in-app purchases and PDFix sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | YMOBD | PDFix |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (86 ratings) — better | — |
| Positive reviews | 34.3% of reviews | — |
| Number of ratings | 86 — better | — |
| Update frequency | Every 5 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 49 MB | 113 MB |
| Age rating | 4+ | 4+ |
| Developer | shenzhen yuming | yDev.su |
Bugs and requests
YMOBD
Reported bugs
15 issues- App crashes on iPhone 17 Pro
- Purchased add-on requires payment again
- Contact section not working
- App crashes every time on iPhone 17 Pro
- Does not connect at all
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- OBD2 reader not read by software
- No transmission temperature reading
- Bluetooth keeps disconnecting
- App says OBD is connected but doesn't show info
- Updated firmware, now won't connect
- App stopped working after update
- Rarely connects, disconnects when trying to get info
- Email not arriving for account creation
- Captcha not working/sending code
- Does not work on iOS 18
Requested features
10 requests- Dark Mode support
- Landscape mode support
- Store data for comparison over time
- Summary of vehicle diagnostics without connection
- Run in background feature
Show 5 moreShow fewer
- Weekly report of diagnostics
- Allow viewing diagnostic data in offline mode
- Remove need for model, make, year input for quick scans
- More frequent updates and optimizations
- Add landscape function in dashboard
PDFix
Not enough reviews yet to summarise bugs or requests.
In-app purchases
YMOBD
- 车辆年检模拟$0.99
- YMOBD-business expansion$1.99
- YMOBD-Battery monitoring$2.99
Show 1 moreShow fewer
- Super Car Sound$5.99
PDFix
- PDFix Pro Weekly3 Days trial$4.997 Days
- PDFix Pro Quarterly3 Days trial$14.993 Months
- PDFix Pro Yearly3 Days trial$29.991 Year









