YAWOA vs ELMCheck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YAWOA
This diagnostic tool helps users understand their vehicle's performance and troubleshoot issues. It allows for scanning and clearing trouble codes, viewing real-time data, and checking smog readiness. Ideal for mechanics, enthusiasts, and everyday drivers seeking to diagnose and fix their car.
- Generate, print, and share repair reports
- Scan and clear trouble codes
- View Mode 6 monitoring results
- Smog readiness check
- Access freeze frame data
- Interactive data graphing and logging
- Wireless vehicle communication
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YAOWA® is a Premium Diagnostic OBD2 Scan Tool. It is used by professional mechanics, auto enthusiasts, and everyday vehicle owners who want to know more about how their vehicle is operating and how their vehicle can be fixed if the Check Engine Light comes on. Features: • Generate, print, and share Repair Reports (details below) • Scan For Trouble Codes • Clear Trouble Codes • Mode 6 (On-Board Monitoring Test Results) • Smog Readiness Check • Freeze Frame Data • Multi data (PID) interactive graphing and logging • No Wires! Communicates with your vehicle wirelessly • Metric and Imperial settings
ELMCheck
Verify the authenticity and functionality of your OBD-II scanner. This app runs comprehensive tests on ELM327 commands to report supported features, ensuring safe and reliable use with your vehicle.
- Authenticity testing for OBD-II scanners
- Comprehensive ELM327 command test suite
- Reports actual supported features
- Ensures safe scanner usage
- Basic tests are free
- Unlock full suite with in-app purchase
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Check the authenticity of your OBD-II scanner with ELMCheck. Most OBD-II scanners on the market use some variation of ELM327, but did you know that many scanners use clones of the original ELM327? It can be hard to tell, because these clones will work well enough for basic use but fail in unexpected scenarios. This is where ELMCheck comes in. ELMCheck offers a comprehensive set of test cases that cover the entire documented set of ELM327 commands. Regardless of which version your scanner says it is, ELMCheck can provide a comprehensive report of the features that are actually supported. Get the confidence you need to use your OBD-II scanner on your vehicle safely. ELMCheck is free to run basic tests. An in-app purchase will unlock the full test suite.
Screenshots
Verdict
The clearest difference is in-app purchases: YAWOA at none against ELMCheck's 1. YAWOA also leads on iOS requirement (10.0 vs 18.0). ELMCheck's advantage is update cadence (every 2 weeks vs every 2 months). On price, rating, ratings volume and ads 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. ELMCheck sells 1 one-off in-app purchase. YAWOA asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for YAWOA against 5.0 for ELMCheck. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
YAWOA ships an update every 2 months, ELMCheck every 2 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | YAWOA | ELMCheck |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 10.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 104 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | 亮 侯 | Fearless design, LLC |
Customer experience
YAWOA
ELMCheck
In-app purchases
YAWOA
No in-app purchases
ELMCheck
- Comprehensive testing$2.99
