Hey suheri we have answered your questions a while ago in the appics telegram group so I will quote our last response:
We have already addressed this issue several times before, it is no secret.
The APX price inside the app wallet is currently fixed to our last ICO price of $0.15 .
As soon as we are listed on coinmarketcap, we can implement the API from coinmarketcap inside the wallet so that the price is always accurate and up to date, as it is with the steem price at the moment.

And about the issues inside the app, I’ve already addressed this multiple times as well.
These errors happen due to our underlying technology, the steem blockchain. it is currently slowed down and not in sync due to constant microforks and different hardfork versions, which results in blocks not getting added into the chain and therefore transactions (like posting/voting/commenting) not going through.
Please remain patient as the developers are already working on this, however this is NOT in our hands and entirely managed by the Steemit team.

remember that the app has always been running smoothly before, it's only the changes in the blockchain that caused all of this. we know exactly when this started - when the witnesses changed... before everything was working fine

📣 However, we have amazing news for you:
We are developing an independent blockchain solution so that we won't have to depend on technology issues like this anymore.
The development is mostly ready for internal testing already. We will make an announcement about it soon!
(this doesn't mean that posts will not show up on steemit anymore, quite the contrary, we will implement a cross-posting solution so that users can decide for themselves whether their APPICS posts should be reflected on steem, hive, or other social media platforms.)

It is frustrating for everyone that you can't use the app as it worked before. but please remain patient, our backend is being migrated to the new blockchain and then we will not have to deal with this anymore.
An official announcement is coming. stay tuned ✌️