We have recently (end of October, 2018) released new filtering functionality based on customer feedback!
Version 2.3.0 or higher provides you the ability to now filter on (1) and/or (2) trainers. If you select a group of gyms you will then have the ability to further filter on (active) trainers in those gyms. You can also not filter on gym, and choose to just filter on trainer(s). Within each area you can select multiple gyms or multiple trainers.
As you select the location you want or the trainer you want from their respective drop down selections simply select 'apply filters'. You will then see the quantity of filters you've applied in the 'filter results' menu bar. To clear these simply tap on 'reset' within filter results.
Your filters are saved for when you next return into the app.
We plan to continue building on the ability to filter/search functionality, stay tuned!!
Thanks for your feedback, we're always listening!