What we don't like:
Even though the App has a good interface, Bitdeal has no partnerships on the app, so you are unable to actually use their service for anything. I could not find any information about the team when researching Bitdeal. This is a huge red flag. Assume Bitdeal is a scam unless you find overwhelming information proving otherwise.
What we like:
The idea behind Bitdeal is sound. Use Bitdeal at retailers that are partnered with Bitdeal and get a discount. This concept has worked with many non-blockchain companies. It is difficult to see the benefit in moving this technology to the blockchain. Bitdeal updates their blog regularly and the app has a good interface.