Smart FM+ vs deviceOwl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart FM+
This app helps you locate your parked car using your phone's location and Bluetooth connectivity. It also monitors your car's battery voltage and provides historical data. Simply plug in the transmitter, connect via Bluetooth, and set your car radio to a matching FM frequency.
- Car-seeking positioning
- Voltage detection
- FM frequency settings
- Bluetooth connectivity
- Parking location recording
- Map navigation to car
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Smart FM + is an application based on Bluetooth and mobile location Usage:Plug smart FM+ transmitter into the vehicle's DC 12V or 24V cigarette lighter socket. After the car is started, the transmitter will be automatically turned on. The indicator light flashes blue to enter the Bluetooth pairing mode.Open the Smart FM+ APP and click “Connect” to connect the device via Bluetooth. Once connected, the icon “Connected” appears. Major function: 1、FM Settings:Turn on the car radio, set the frequency between 88.1-107.9 MHZ, plug in the device, adjust the frequency to the same frequency you set on the radio. 2、Voltage Detection:Voltage Detection:\nThis product will automatically detect the battery voltage of your car and the voltage of USB1 and USB2 outputs. The log icon below can check the voltage history of the car. Click the battery voltage to check the battery voltage status of the car. Green/Yellow/Orange icons are to help you determine battery status. 3、Car-seeking positioning:Find My Car:\nWhen your stop the engine, the product will automatically record the location and time of your current parking. When you don't remember the parking position of your car, open the app and follow the direction of the arrow. You can also open the map navigation to help you find the last recorded parking position. When you are close to the car, you will be prompted “The car is close, please unlock your car.“.
deviceOwl
This app uses AI to identify household and covert spy devices by simply pointing your smartphone at them. It reveals device capabilities, privacy implications, and manufacturer details to help you protect your privacy.
- AI device identification
- Privacy implications revealed
- Device capabilities details
- Manufacturer information
- Offline device checking
- Basic and Advanced Editions
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Discover Device Potential deviceOwl is an AI point-and-shoot hardware device checker that helps you identify the make and model of devices, and reveal their privacy implications. Covert spy devices are cameras and microphones that are either miniaturized, or disguised as other trusted household objects. They have serious implications, because they can be well disguised, highly reliable, and are widely available for purchase. Household smart devices can enhance the convenience and peace of mind we have at home, but sometimes at a cost of privacy and security. With an eye towards privacy, deviceOwl helps you quickly identify these devices, providing both simple, and in-depth details about their capabilities. Simply point your smartphone at a device, and let deviceOwl intelligently check it, based on its knowledge of thousands of devices. If a device is recognized, deviceOwl provides details about the device's capabilities, helping you to make the right decisions about how to protect your privacy, and the privacy of the people you care about. Information includes make, model, privacy and safety considerations, sensors, network, storage, power, remote control, AI capabilities, and manufacturer information, including origin, parent companies, privacy policy, and the current government blacklist status of the manufacturer. FEATURES —————-- - Basic Edition helps identify popular consumer household smart devices. - Advanced Edition helps identify covert consumer spy devices, and provides in-depth device capabilities with a focus on privacy. - Regular device knowledge updates keep deviceOwl aware of new devices. - Heads up display and interactive guidance to make it easier to check devices. - Designed for traveling. Once installed and updated, check devices without a cloud or network connection. IMPORTANT NOTES & LIMITATIONS —————————————————---- - Checks visible devices that are roughly up to the size of a shoebox. - Please follow the guidance provided on safely and correctly checking devices. - Some devices may look similar to each other, especially under different lighting conditions, and from different angles. Please confirm all device detections using the reported make and model. - DeviceOwl is not a network device scanner, or camera lens reflection checker. Instead, it uses AI to visually recognize devices by their shape and form. - Does not identify individual components of dismantled devices, such as their circuit boards and other components. - Does not identify certain device types whose surface is dominated by an LCD screen, including TV's, tablets, and smartphones. Refer to the device type selection screen for the most current list of supported device types. - Due to the volume of sample submissions, Entropic Labs responses to device sample submissions may be limited. SUBSCRIPTION DETAILS ———————————- deviceOwl “Basic Edition” - Check popular consumer household smart devices using AI computer vision. - Reveal basic information, and in-depth device capabilities with a focus on privacy. deviceOwl “Advanced Edition” (Subscription) - Boosts deviceOwl with knowledge of covert consumer spy devices. - Reveal important privacy and safety considerations for select devices. - Cognition Boost feature helps to help identify partially damaged or marked devices. - Payment will be charged to your iTunes Account at confirmation of purchase. - Subscription renews automatically unless auto-renew is turned off at least 24-hours before the end of the current period. - Manage your subscriptions, and turn off automatic renewal by going to your Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription.
Screenshots
Verdict
The clearest difference is rating: deviceOwl at 4.3 against Smart FM+'s 2.3. deviceOwl also leads on ratings volume (539 vs 15). Smart FM+'s advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 2 months). On price, review sentiment, ads 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. deviceOwl sells 1 in-app purchase, starting at $9.99 per year. Smart FM+ asks for nothing beyond the download.
deviceOwl holds the better App Store score, 4.3 against 2.3. That said, the two scores are not equally well evidenced: deviceOwl has 539 ratings behind it against 15, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 49% positive.
Smart FM+ ships an update every 3 weeks, deviceOwl every 2 months. Both last shipped on November 3, 2026.
| Parameter | Smart FM+ | deviceOwl |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (15 ratings) | 4.3 (539 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 49.1% of reviews |
| Number of ratings | 15 | 539 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 17 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | 桂标 曾 | Entropic, LLC |
Customer experience
Smart FM+
deviceOwl
Bugs and requests
Smart FM+
Not enough reviews yet to summarise bugs or requests.
deviceOwl
Reported bugs
4 issues- Frequent crashes and freezes
- Unreliable device detection
- Subscription management problems
- Unresponsive customer support
Requested features
4 requests- Free trial period for premium features
- Expanded device database
- Improved user interface
- Seamless integration with other security apps
In-app purchases
Smart FM+
No in-app purchases
deviceOwl
- Annual Advanced Subscription$9.991 Year









