Thanks for your answer. Is there any exchange in your mind that has very low withdral fees please? Please keep up great work. Sometimes people are weird and don't appreciate if someone creates something useful. Once the tool has a bit more features I won't mind to pay for it but still need to figure out how to avoid fees. BTW. I noticed that Yobit site has some coins that have same symbols like famous coins for example BCC. BCC is bitcoin cash but on yobit it's bitconnect coin. The tool automatically pairs these coins and shows the difference in price but they are not the same! There are many like this on Yobit. Please be aware exchange.blue.
What kind of features would you like to see in the app?
1) I would like to see percentage between two exchanges after all the fees so I don't have to calculate it myself all the time. I can easily forget some fee and then there is a risk that my arbitrage won't be succesfull. I would like to see pure percentage after all the fees.
2) Definitely alerts would be nice so I can be notified by email when something pops up. I should be able to setup my own alert for example I should be able to choose exchange where I want to buy and exchange where i want to sell and percentage between them (something like lower then ..., or higher then....). Once it reaches my requirements I will be notified so I can buy immediatelly.
These are just some tips for now. I will be thinking of more features. Happy to help, you do a great job. Please let me know if you would like to get any feedback on something regarding to the app.