SimfyAI Data vs OBD2 Ninja
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SimfyAI Data
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Discover the Value of Your Data and Take Control of the Analysis Process. Our app is a locally-hosted, private data analysis tool designed exclusively for iOS. It fully protects your privacyβyour data never passes through any third party, and we do not collect any of your information. Performing basic analyses with simple taps and inputs
OBD2 Ninja
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Check engine light on? Find out whether it's serious before you book a shop visit or drive another mile. OBD2 Ninja reads your car's codes and rates every one Fix Now, Fix Soon, or Monitor for your year, make and model. Then it tells you what to check first. $0.99 once. No subscription, no account, no ads. OBD2 Ninja carries Apple's "Data Not Collected" privacy label, and everything works offline. In a parking garage, on the shoulder, with no signal at all. IS IT SERIOUS? Every code gets an urgency rating, not just a definition: β’ Fix Now: stop driving or get it looked at today β’ Fix Soon: safe to drive, book it this week β’ Monitor: keep an eye on it Plus what usually causes it on your specific vehicle, and the cheapest thing to check first. READY FOR EMISSIONS? See all eight readiness monitors at a glance before you go to the test station. Know whether you'll pass, or how many more miles of driving you need, instead of paying to find out. READ AND CLEAR β’ Stored, pending and permanent codes β’ Freeze frame data captured when the fault tripped β’ Clear codes and reset the light after you fix it β’ Confirm the fix actually held LIVE DATA Watch coolant temp, fuel trims, O2 sensors, RPM, load and timing in real time. Pin down an intermittent fault the parts-store scanner can't see. WHAT YOU NEED Any ELM327 Bluetooth LE or Wi-Fi adapter, and a car built 1996 or later (2001+ petrol / 2004+ diesel in the EU). Tested and confirmed with: Carista, Vgate iCar Pro BLE, OBDLink MX+. Full list and setup guide at ninja-obd2.com. WHAT IT DOESN'T DO OBD2 Ninja reads the engine and emissions systems that every car is required to expose. That is what turns your check engine light on. It does not read ABS, airbag, transmission or body-module codes, and it can't do dealer-level coding. Those need manufacturer-specific tools. We'd rather tell you that now than after you've paid. PRIVACY No account. No sign-up. No analytics. Nothing leaves your phone. Apple's own privacy label on this page reads "Data Not Collected." Check it. SUPPORT A real person answers every email. support@ninja-obd2.com
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Verdict
The clearest difference is price: SimfyAI Data at Free against OBD2 Ninja's $0.99. OBD2 Ninja's advantage is update cadence (every 3 days vs monthly). On ads, in-app purchases, 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
SimfyAI Data is free to download; OBD2 Ninja costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SimfyAI Data ships an update monthly, OBD2 Ninja every 3 days. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.
| Parameter | SimfyAI Data | OBD2 Ninja |
|---|---|---|
| Price | Free β better | $0.99 |
| Update frequency | Monthly | Every 3 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 17.0 β better | 18.0 |
| Further details β not scored | ||
| Size | 2.2 GB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Yanxu Xie | Cory Green |
In-app purchases
SimfyAI Data
No in-app purchases
OBD2 Ninja
No in-app purchases
Questions
Is SimfyAI Data free?
Is OBD2 Ninja free?
Do SimfyAI Data or OBD2 Ninja have ads?
Which is updated more often, SimfyAI Data or OBD2 Ninja?
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