Definitely
- responsive
Scale outer and some fancy positioning and resizing, CSS with web elements.
- sending/receiving data from servers
Easy: PHP/MySql over ajax
Hard(er): Websocket/nodejs
- could support some sort of payment system? even if it's redirecting to a browser link or something like that
Lots of methods to implement paypal, mollie, stripe etc all these has some form of web interface.
- has text chat features
The multiplayer object has decent chat features
- safe? (i'm not a web developer, idk i'm not sure if Construct has the tools to ensure privacy and safety for transactions, text messages etc)
It is all web based, so, any form of payment system that has web based interaction will suffice. It is just a matter of how well you implement it that could lend itself for problems.
- that could show you content based on your gps location?
I used a separate PHP page for a solution like this once, a simple post to to PHP page helps determine location etc and based off that perform actions.
I won't go in too much detail here, but I'm looking at ways to share mutual aid requests/offers
Will require some sort of database backend to store related information. Again, PHP/MySql lends itself for this.
Also, with the web3 and ether contracts, you could make a really fancy payment system, but will require some hefty insights on the whole crypto based contracts (not to mention the currency would be crypto). The former mentioned should be a lot easier if your able to communicate with databases over php.
I know a few people that could help me with the technical needs of an app like that, as I definitely don't have the expertise for this, but I was wondering if you did a non-game app with C3 or something similar? if yes how did it go?
Most of the apps I made were generally customized to meet specific needs. Those I made work well.