No, it's usually easier to get a house where you can come up with your own down payment. If you qualify for an FHA loan, you can keep your down payment to a minimum, maybe only 3%. But then you will have to pay a premium on your monthly payments, for having less than 20% down.
Rent-to-own programs have risks for both the seller and the buyer. One thing to consider is if your financial situation is such that you can't come up with your own down payment, how ready are you to take on all the financial responsibilities of home ownership (property taxes, maintenance, etc.)? How sure are you that you definitely want to stay in that area long enough to commit to buying a home that you can't yet afford? How do you feel about taking on that risk of possibly losing all that extra money paid to the landlord?
Me personally, I wouldn't do it. I'd rather look for the cheapest, smallest rental I could afford, and put my extra money into the best savings account I could find, until I had enough for a down payment. The risk with that plan is that if home prices keep going up by more than what I'm saving, I might never reach that point of having "enough." But I personally would rather face that risk rather than the risk of losing all the extra money to the landlord/seller, if I change my mind, lose my job, decide I want to live someplace else, etc.
It's a personal decision. You have to consider carefully your own situation, and what home prices are doing in your area (increasing, declining, holding steady).
Back in the '80's, when home prices were going up by tens of thousands of dollars, year after year, rent-to-buy made more sense than it does today, when home prices are holding steady or declining.
You just have to know your own area, make your best guess about your own personal situation, and see how the pluses and minuses shake out.