I just don’t see the point in this, especially since this is a derivatives exchange.
Maybe OP is looking for products that are not offered by the popular derivatives exchanges
You mean Etherdelta that was a decentralized exchange way back when the likes of Uniswap wasn't a thing? I remember that one but I think you need to connect it only with a browser extension wallet like Metamask but before it was MyEtherWallet is the trend. I don't know if they are related but I feel the likes that they are somehow connected in some way, I could be wrong too.
No OP is asking about Delta.exchange not Etherdelta. The two are different
I have never used the exchange before but after looking at the reviews on trustpilot and google play, the most common complaints are
1. Slow withdrawals that can take more than 24 hours at times
2. They have a habit of suspending the markets when the market crashes, even the most recent crash
3. App freezes at times during volatile markets. You don't want that to happen when you have an open position.
I suggest you read the reviews
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https://www.trustpilot.com/review/www.delta.exchange-
https://play.google.com/store/apps/details?id=exchange.delta&showAllReviews=true