Betterment.com offers an annual fee of only one-quarter of one percent. This is better than a charge of $1 per month on an account for a beginning investor.

Betterment.com is an app that charges 0.25 percent

If I have $100 in my account, then the amount is 0.0025 x $100 =  $0.25  
Twenty five cents.

Perfect for the beginning investor who is in an entry level job.

The app checks your understanding of the terms

The account verifies your email address

The 

You can begin with a single deposit

I left the following message for the Betterment management team:

i am a high school teacher. I found out that other micro investing apps charge $1 per month.  I selected your company because you charge 0.25% on the account.  that will help my students who are 19-21 years old and newly employed


I look forward to recommending this microinvesting system to my students.