Two different period apps. Glow and Ovia.

bailey🖤 • I pray that we all get what we want. 🖤
I'm currently late for my period. 8 days late on Glow and 3 days late on Ovia. I've discovered that Ovia was correct at predicting my period last month. I havent tested due to being afraid I'm late just because. If i were to test now, what brand should I use? Would the dollar store test be alright?