Online image markup platform

[tricky]

Any suggestions for an online image markup solution that will help our clients to log in and give comments/scribbles on draft images? We tried ReviewStudio for a while but found it a bit cumbersome and it didn't fully support tablets/smartphones.

[glorybound]

I use Review Studio, my clients, do get frustrated on their phone or tablet. https://cageapp.com/media-collaboration

[Vizioen]

We use proofhq (https://www.workfront.com/proofhq/). It has his Pros en Cons. We also had a client that wanted to use his own called filestage (https://filestage.io/)