Separate checking accounts not required, but you need to maintain separate books and records.The TREC requirement is correct, but odds of enforcement seem low.

I have a savings and checking account for my llc, and each property, all under the same banking app.

Quote from @Sharad Bagri: For a general partnership (without the LLC), that will invest in real estate in Ohio, what kind of bank account can we open, like checking, saving or anything else?

In doing so you create an accounting nightmare.

Below are some important things for you to be mindful when you have to file a partnership tax return1) A partnership return generates a form K-1 that each investor will need to complete his / her tax return.Will the accountant be able to complete the tax return by April 5th to give the investor/partner enough time to file his individual return?

What I loved about them was that each property could have it's own checking account.

(although, with the new smart phone technology, they do require gmail accounts, as such, sending from that account from your phone is fine, but you should be sending to people who already know you have a real email account.

From my perusal of what the software offers, it appears to be quite comprehensive both on the management and accounting side and the monthly cost is not excessive.However, I wanted to check in with fellow investors on this platform to see if anyone is currently using or have used STESSA and what has been their experience, particularly on the security, functionality, user friendliness and stability of the online software system.Many thanks in advance for your feedback. 

That said the best way to pick your accounting software is to find a Tax CPA you like and ask them what they prefer.

You should also have a conversation with your tax accountant about your bank account setup.