For himself, Riles said his cards help remind him of God both during ordinary, daily life and before big events, like when he was taking a test to become a captain of a fishing boat on the Jersey Shore. His daughter used them before she took her boards test to become a nurse.
And fifteen years ago, when Riles was diagnosed with a serious blood disorder, he was able to recall the presence of God even in the midst of a life-altering diagnosis.
During a routine physical, Riles found out that his body was producing too much blood. Having never donated blood before - "I was always too busy and I hated needles" - Riles had to have some of his excess blood taken out immediately.
While sitting in the recovery room snacking on the typical juice and cookies, Riles saw the nurse discard the blood, which he thought might have been used to help other people.
"When I saw they threw my blood in the garbage, I almost choked on my Lorna Doone, and I said what are you doing?"
But because Riles' blood contained too many red blood cells, it had to be discarded.
"So I got down on my knees at that moment and I said Lord Jesus, I want to thank you...for bringing me to this point in my life. I don't even know what's going on yet, but through your mercy and your love, you will bring good out of this to others."
Ever since, Riles made it his mission to organize blood drives and inspire others to donate blood.
"Fifteen years and 200 pints of my blood in the garbage can ago, and through the grace and mercy of God, I am still alive...and God is inspiring me through these affirmations and scripture passages to speak to other people who are inspired to donate blood to save other people's lives."
The process of building the app has just begun, Riles said.
"It takes a village to build a mobile app," he said. He still needs backers to reach the necessary funding of $30,000, as well as additional quotes and, of course, prayers so that all goes according to God's will.
(Story continues below)
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"I'm asking people to send me some quotes that have been meaningful to them, that have given them peace and joy and drawn them closer to Christ over the years."
A couple of Riles' favorites include:
"I believe I am always divinely guided, I believe I will always take the right turn in the road, and I believe God will always make a way where there is no way."
He also loves Philippians 4:13: "I can do all things through Christ who strengthens me."
Riles said he's been very humbled to be involved in the process of creating an app at his age - "My kids think it's a hoot. When I'm on the computer it's like watching 4-hour paint dry."
But every time he's tempted to think "Why me?" he changes his tune to "Why not me, by the grace of God?" he said.