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1. One major drawback of this app is its reliance on Bluetooth for accessing sensor data from Aranet 4. Consequently, users are unable to view data when they are outside the range of their home's Bluetooth network. 2. Despite the app indicating smart home integration, it lacks compatibility with any smart home systems except for Homey, which requires additional payment. This additional expense burdens customers unnecessarily. 3. The data visualization aspect of the app is lacking. It displays CO2 levels above normal occasionally, but fails to provide insights such as the duration of harmful exposure or the significance of the data. This lack of clarity reflects poorly on both the app and its developers. 4. The product's price, almost 200€, is exorbitant considering its limited features compared to other CO2 monitors on the market. 5. Lastly, the app's restrictive nature gives the impression that the developers are attempting to confine customers within a closed ecosystem, depriving them of the freedom to utilize the product as they see fit.
