Invanto 

Invanto is the best solution if you want to have a virtual school. Easy to use, easy navigation for your clients...and a really good support.

The owner sold me a Lifetime deal through Appsumo. Meaning I need to pay a lumpsum once and no need to pay recurring monthly fees.
And now the owner Deep is saying that he is going to shut down all lifetime paid accounts. Deep also keeps flipping on to his commitments, and takes criticisms about his products too seriously.
I think this business is going to go bankrupt, not worth to use because Invanto is $hit!

Dishonest platform and owners ask for unreal money oftentimes.

Used Appsumo to gain traction and following, then repeatedly went back on his word, stealing everyone's money. This behaviour does not inspire trust.

they do not respect their customer, they are not interested in helping us, support us, and at the end they only thinking in money nothing else
the app is very slow, never do the job
not user friendly and it hard to integrate it with other

I bought invanto and found out there was alot of bugs in it. Yesterday they send me an email that they are cancelling all LTD account due to their dispute with appsumo.
This is big shame for a company that it's causing trouble for end users because of their dispute with other company.
I highly doubt that if our data is secure with their server even. They might be using your clients emails for marketing purpose.

Bought an early bird lifetime deal with this company. They have just sent out emails telling us they decided to terminate all lifetime accounts despite us paying for a LIFETIME account.

They keep the money, we get the boot.Tough luck!

To make things worse, they hold our data and businesses hostage to get further payments.

Do not, under ANY circumstance trust this company with your business.