It wasn't working for me initially. The overlay didn't seem to do anything and no additional currency. Seems that it's not an issue with the mod but possibly something to do with software/security on the device. Here's a solution for other people with same issue:
1. Download Parallel App from App Store.
2. Run Parallel App, and click "+"(Add)
3. Find the Modded App (Anime Chat) and click Add
4. Run the Modded Application (Anime Chat) within Parallel App
5. You're welcome