. 2021 Mar 30;279(3):1257–1267. doi: 10.1007/s00405-021-06767-9

Table 2.

Criteria for selecting a tested application

Inclusion criteria	Exclusion criteria
- Free of charge - In Polish - Using elements of sound therapy - Enables patients to have more options than a conventional sound generator - Supported by phones with Android or IOS systems	- Chargeable - In a language other than Polish - Mechanism of action not based on sound therapy - Requiring a special device (other than a mobile phone) - Special software requirements

Inclusion criteria

Exclusion criteria

- Free of charge

- In Polish

- Using elements of sound therapy

- Enables patients to have more options than a conventional sound generator

- Supported by phones with Android or IOS systems

- Chargeable

- In a language other than Polish

- Mechanism of action not based on sound therapy

- Requiring a special device (other than a mobile phone)

- Special software requirements