OBD Compass vs ShellMan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OBD Compass
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The Bluetooth OBDII scan tool is loaded with essential features such as full OBDII functionality. Key Features: 1. Vehicle health check, read vehicle faults. 2. Various visual data such as numerical values, waveforms, and dials. 3. n-depth analysis of fault codes, including causes of generation, potential impacts of fault codes on vehicles, maintenance suggestions, and estimated costs, etc. 4. Maintenance records and reminders. 5. Community and Knowledge Base.
ShellMan
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ShellMan is the most powerful local-network controller for your Shelly Gen 2, Gen 3, and Gen 4 smart home devices. No cloud. No subscription. Pure local control. Disclaimer: This app is an independent, unofficial third-party tool and is not affiliated with, endorsed by, sponsored by, or in any way connected to Allterco Robotics Ltd. or its subsidiaries. "Shelly®" is a registered trademark of Allterco Robotics Ltd. All product names, logos, and brands mentioned are property of their respective owners and are used solely for identification purposes. This app communicates with devices using their publicly documented, open JSON-RPC 2.0 API. DISCOVER YOUR DEVICES • Auto-discover devices instantly via mDNS — no IP addresses needed • Scan your entire subnet to find every Shelly on your network • Add devices manually by entering their IP address CONTROL EVERYTHING • Turn switches on/off with a single tap • Dim lights to the perfect level • Adjust colour temperature and RGB colour for smart bulbs • Open, close, and position covers and blinds with precision REAL-TIME MONITORING • Live status updates via WebSocket — see your devices react in real time • Energy dashboard with power, voltage, current, and consumption data • Sensor readings: temperature, humidity, flood, smoke, motion, and illuminance MANAGE YOUR DEVICES • View firmware versions and update devices over the air • Batch-update multiple devices at once • Create and manage schedules directly on each device • Reboot or factory-reset devices when needed WORKS WITH YOUR HOME • Full support for password-protected devices (SHA-256 Digest authentication) • Automatic reconnection if a device drops off the network • Dark mode, light mode, and system theme support • Available in English, Deutsch, Français, Español, 中文, and 日本語 Compatible with all Shelly Gen 2, Gen 3, and Gen 4 devices. Gen 1 devices are not supported.
Screenshots
Verdict
The clearest difference is update cadence: ShellMan at fortnightly against OBD Compass's monthly. On price, ads, in-app purchases and device support 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.
OBD Compass ships an update monthly, ShellMan fortnightly. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.
| Parameter | OBD Compass | ShellMan |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 25 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | HK TOPDON TECHNOLOGY Co., LIMITED | Lars Roth |
In-app purchases
OBD Compass
No in-app purchases
ShellMan
No in-app purchases









