SpotHero is a parking reservation service. They partner with garages throughout the country to provide you with a guaranteed parking spot at a discounted price. For every friend you refer who completes a first-time SpotHero reservation over $8 using a referral code, you receive a promo code for $7 off your next SpotHero reservation. Your reward promo code will be delivered via email within 2 days after your friend's valid reservation ends. Promo codes expire 18 months after delivery. Total savings limited to $200 per year.