Tinnitus-retraining therapy will be offered in the control arm which represents the standard evidence-based intervention on the NHS. (2) Participants enrolled to this arm will undertake tinnitus retraining therapy with a trained audiologist. The sessions will last 30 minutes with the option for further sessions should the patient which to have more support with their tinnitus to mimic the NHS programme as much as possible. These sessions will encompass a brief audiological history followed by therapy tailored to the patient's needs allowing for patient-centred optimisation of tinnitus burden and secondary comorbidities. This may include relaxation, CBT and advice surrounding sound as well as white noise masking therapy.

The smartphone application delivers personalized tinnitus therapy combining evidence-based CBT with mindfulness, patient education as well as physical therapy such as stretches and exercises. There are additional sounds available to listen to from the sound library. There will be a structured programme that the participants can work through however they are encouraged to personalise their own therapy.

The smartphone application delivers personalized tinnitus therapy combining evidence-based CBT with mindfulness, patient education as well as physical therapy such as stretches and exercises. There are additional sounds available to listen to from the sound library. There will be a structured programme that the participants can work through however they are encouraged to personalise their own therapy.

Tinnitus burden via Tinnitus Functional Index questionnaires at 0 months (T0), 1 month (T1), 3 months (T2) and 6 months (T3).

Insomnia index as calculated via Insomnia Severity Index questionnaire at 0 months (T0), 1 month (T1), 3 months (T2) and 6 months (T3).