Alternative to Denoise on Iphone for background noise removal

My wife has her own business and does a lot of her advertising on her Instagram. A lot of times she records at her co-working office, which has a pretty bad echo/background noise. I can remove it on my computer but was looking for an app she could use on her phone. I saw denoise get some mentions but it has some pretty bad reviews.

Any Suggestions?

Also if you have used denoise and thought it was awesome, that would be good to know!