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| SN | Wearable device | Mobile supported OS | Remarks | Connection |
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| 1 | Smart biomedical system | Mobile app android | Null | Wi-Fi, Bluetooth, GSM |
| 2 | Smart glasses | No | Wearable IoT with complex artificial perception embedding for AD patients | N/A |
| 3 | Smart assistive mhealth system | No | For optimal performance, the system can be further miniaturized into a wearable device | GSM, SIM (SMS is used to send message) |
| 4 | Environment aware system | Android application | To increase the acceptance, rate the authors stated that the proposed system can be decreased to a smaller size due to the feedback was uncomfortable by many of the patients. | DFRobot GPS/GPRS/GSM shield V3.0 |
| 5 | AD-patient monitoring device | Software was written into AppInventor | It is suggested by the authors that by using higher performance sensors it can be upgraded, and for reducing the device size a PCB is needed. | Bluetooth |
| 6 | Halcyon device | Full-fledged Android 4.2.2 OS is running on the “XTouch-Wave”. Android mobile app | Since there are chances that a patient might takes of the wearable like watch and not wear it again that is where halcyon device can be effective solution | Near field communication (NFC), bluetooth, and RFID (radio frequency identifier‐cation) |
| 7 | Intelligent assistive tool | Mobile app | As future work, it is suggested a few more features may be added and developing the system into a wearable device to provide more patient’s medical details. | GPS-WiFi |
| 8 | Autonomous tracking device | Mobile text on number | In the future, the authors mentioned that more features can be added that are lacked now and improve the system. | GSM |
| 9 | Smart assistive glasses | No | The smart glasses were developed as a prototype and suggested to be a practical solution in the future that can help AD patients. | Wi-Fi, bluetooth |
| 10 | Smart glasses | Web-based frontend server | Null | BLE (bluetooth low energy) gateway |
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