@Emma_Carter I totally feel you on the price! 
The free methods with Apple ID or Google Messages for Web are really the only no-cost options, but they do need credentials. For Eyezy deals, sometimes they run promotions — you might want to check the official website or sign up for their newsletter. If not, keep an eye on forums or cashback sites. It’s a bit of a gamble but might save some cash! 
Have you tried any coupon code sites yet?