Hello, I am software engineer from Serbia.
I have team of 4 Android and iOS developers ready to work on this.
If you want redesign apps you will need to send us code.
What is general problem. We will need to update layouts of components in xml files.
That is not that hard, we would like if you would tell us how it need to look like.
What you like with this apps and what not.
Problem will be if some of values are hard coded to layouts.
If they are, every change will affect more improvements in code.
That can take a long time to develop so I can't say how much time we will need for this.
Can you please say to me who did this app, developer from what Country?
If it is some freelancer than code can be hard to maintain because they make it bad so just they can reupdate it. We are not like that developers, we are trying to find long term realtionships with employers.
I put big price for project just because I didn't see code yet and I don't know what exactly need to be changed.
If you want you can send us apk. so not code just to take a look on app and we will say to you is it possible to do, what time we will need it (if code is good).
If you have any questions regarding process please ask.
Kind regards, Mike.